Hitachi Universal Storage Platform V Hitachi Universal Storage Platform VM User and Reference Guide FASTFIND LINKS Document Organization Product Version Getting Help Contents MK-96RD635-04
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Contents Preface .................................................................................................. vii Safety and Environmental Notices....................................................................... viii Intended Audience .............................................................................................. ix Product Version................................................................................................... ix Document Revision Level .........................
Back-End Directors and Array Domains ........................................................ 2-9 Hard Disk Drives ...................................................................................... 2-11 Service Processor..................................................................................... 2-11 Power Supplies ........................................................................................ 2-12 Batteries ..............................................................................
Units and Unit Conversions....................................................................
vi Contents Hitachi Universal Storage Platform V/VM User and Reference Guide
Preface This document describes the physical, functional, and operational characteristics of the Hitachi Universal Storage Platform V (USP V) and Hitachi Universal Storage Platform VM (USP VM) storage systems and provides general instructions for operating the USP V and USP VM. Please read this document carefully to understand how to use this product, and maintain a copy for reference purposes.
Safety and Environmental Notices Federal Communications Commission (FCC) Statement This equipment has been tested and found to comply with the limits for a Class A digital device, pursuant to part 15 of the FCC Rules. These limits are designed to provide reasonable protection against harmful interference when the equipment is operated in a commercial environment.
Intended Audience This document is intended for system administrators, Hitachi Data Systems representatives, and authorized service providers who are involved in installing, configuring, and operating the Hitachi Universal Storage Platform V and/or Hitachi Universal Storage Platform VM storage systems. This document assumes the following: • The user has a background in data processing and understands RAID storage systems and their basic functions.
Changes in this Revision • Added the 400-GB disk drive (Specifications at a Glance, Hard Disk Drives). • Updated the maximum usable capacity values (Specifications at a Glance). • Added a table of specifications for the disk drives (new Table 2-3). • Updated the list of public system option modes (Table 3-1). – Added the following new modes: 545, 685, 689, 690, 697, 701, 704. – Modified the description of mode 467 as follows: – • Changed the default from OFF to ON.
Referenced Documents Hitachi Universal Storage Platform V/VM documentation: • Table 1-3 lists the user documents for Storage Navigator-based software. • Table 1-4 lists the user documents for host- and server-based software. • Table 3-5 lists the configuration guides for host attachment.
Document Conventions The terms “Universal Storage Platform V” and “Universal Storage Platform VM” refer to all models of the Hitachi Universal Storage Platform V and VM storage systems, unless otherwise noted. This document uses the following icons to draw attention to information: Icon Meaning Description Note Calls attention to important and/or additional information. Tip Provides helpful information, guidelines, or suggestions for performing tasks more effectively.
Getting Help If you need to call the Hitachi Data Systems Support Center, make sure to provide as much information about the problem as possible, including: • The circumstances surrounding the error or failure. • The exact content of any message(s) displayed on the host system(s). • The exact content of any message(s) displayed by Storage Navigator. • The service information messages (SIMs), including reference codes and severity levels, displayed by Storage Navigator and/or logged at the host.
xiv Preface Hitachi Universal Storage Platform V/VM User and Reference Guide
1 Product Overview This chapter provides an overview of the Universal Storage Platform V and VM storage systems.
Universal Storage Platform V Family The Hitachi Universal Storage Platform™ V family, the industry’s highest performing and most scalable storage solution, represents the first implementation of a large-scale, enterprise-class virtualization layer combined with thin provisioning software, delivering virtualization of internal and external storage into one pool.
New and Improved Capabilities The Hitachi Universal Storage Platform V and VM storage systems offer the following new and improved capabilities as compared with the TagmaStore Universal Storage Platform and Network Storage Controller: • NEW! Hitachi Dynamic Provisioning™ Hitachi Dynamic Provisioning is a new and advanced thin-provisioning software product that provides “virtual storage capacity” to simplify administration and addition of storage, eliminate application service interruptions, and reduce cos
Specifications at a Glance Specifications for the Universal Storage Platform V Table 1-1 provides a brief overview of the USP V specifications. Table 1-1 Specifications – Universal Storage Platform V Controller Basic platform packaging unit: Integrated control/array frame and 1 to 4 optional array frames Universal Star Network Crossbar Switch Number of switches 8 Aggregate bandwidth 106 GB/sec Aggregate IOPS 4.
Internal Raw Capacity Minimum (73-GB disks) 82 TB Maximum (750-GB disks) 850.8 TB Maximum Usable Capacity—RAID-5 Open systems (750-GB disks) 739.3 TB Mainframe (400-GB disks) 374.3 TB Maximum Usable Capacity—RAID-6 Open systems (750-GB disks) 633.7 TB Mainframe (400-GB disks) 318.5 TB Maximum Usable Capacity—RAID-1+ Open systems (750-GB disks) 423.9 TB Mainframe (400-GB disks) 207.
Specifications for the Universal Storage Platform VM Table 1-2 provides a brief overview of the USP VM specifications. Table 1-2 Specifications – Universal Storage Platform VM Controller Single-rack configuration: controller and up to two disk chassis Optional second rack: up to two disk chassis Universal Star Network Crossbar Switch Number of switches 2 Aggregate bandwidth 13.3 GB/sec Aggregate IOPS 1.
Controller Maximum Usable Capacity—RAID-5 Open systems (750-GB disks) 144.7 TB Mainframe (400-GB disks) 73.3 TB Maximum Usable Capacity—RAID-6 Open systems (750-GB disks) 124 TB Mainframe (400-GB disks) 62.4 TB Maximum Usable Capacity—RAID-1+ Open systems (750-GB disks) 87.1 TB Mainframe (400-GB disks) 42.
Software Products The Universal Storage Platform V and VM provide many advanced features and functions that increase data accessibility and deliver enterprise-wide coverage of online data copy/relocation, data access/protection, and storage resource management.
Table 1-3 Storage Navigator-Based Software Name Description Documents Obtains system configuration and status information and sends userrequested commands to the storage systems. Serves as the integrated user interface for all Resource Manager components. MK-96RD621 NEW: Hitachi Dynamic Provisioning Provides “virtual storage capacity” to simplify administration and addition of storage, eliminate application service interruptions, and reduce costs. See Hitachi Dynamic Provisioning.
Encrypted Communications Allows users to employ SSL-encrypted communications with the Hitachi Universal Storage Platform V/VM. MK-96RD631 Hitachi LUN Expansion Allows open-system users to concatenate multiple LUs into single LUs to enable open-system hosts to access the data on the entire Universal Storage Platform V/VM using fewer logical units. MK-96RD616 Hitachi Virtual LVI/LUN Enables users to convert single volumes (LVIs or LUs) into multiple smaller volumes to improve data access performance.
Table 1-4 Host/Server-Based Software Name Description Documents Hitachi Command Control Interface Enables open-system users to perform data replication and data protection operations by issuing commands from the host to the Hitachi storage systems. The CCI software supports scripting and provides failover and mutual hot standby functionality in cooperation with host failover products.
HiCommand Tuning Manager Provides intelligent and proactive performance and capacity monitoring as well as reporting and forecasting capabilities of storage resources.
2 Architecture and Components This chapter describes the architecture and components of the Hitachi Universal Storage Platform V and VM storage systems: Hardware Architecture Hardware Components Control Panel and Emergency Power-Off Switch Intermix Configurations Architecture and Components Hitachi Universal Storage Platform V/VM User and Reference Guide 2-1
Hardware Architecture Figure 2-1 illustrates the hardware architecture of the Universal Storage Platform V storage system. Figure 2-2 illustrates the hardware architecture of the Universal Storage Platform VM storage system. As shown, the USP V and USP VM share the same hardware architecture, differing only in number of features (FEDs, BEDs, etc.), number of hard disk drives (HDDs), and power supply.
Channel Interface Controller Power Supply SMA SMA SM Path Input Power PDB-Box PDU DKA PDB-Box PDU CHA CHA CHA CSW CSW CMA CMA DKA AC-DC AC-DC Power Power Supply Supply Battery Battery Box Box Input Power CHA CHA CHA Cache Path Power Supply Disk Path (max. 8 paths) AC-DC Power AC-DC Supply Power Supply FC-AL (4 Gbps/port) Max. 60 HDDs Disk Unit Figure 2-2 Max.
Storage Clusters Each controller consists of two redundant controller halves called storage clusters. Each storage cluster contains all physical and logical elements (for example, power supplies, channel adapters, disk adapters, cache, control storage) needed to sustain processing within the storage system.
Hardware Components The USP V/VM hardware includes the controller, disk unit, and power supply components. Each component is connected over the cache paths, shared memory paths, and/or disk paths. The USP V/VM controller is fully redundant and has no active single point of failure. All components can be repaired or replaced without interrupting access to user data.
Shared Memory The nonvolatile shared memory contains the cache directory and configuration information for the USP V/VM storage system. The path group arrays (for example, for dynamic path selection) also reside in the shared memory. The shared memory is duplexed, and each side of the duplex resides on the first two shared memory cards, which are in clusters 1 and 2. In the event of a power failure, shared memory is protected for at least 36 hours by battery backup.
Front-End Directors and Host Channels The Universal Storage Platform V and VM support all-mainframe, all-opensystem, and multiplatform configurations. The front-end directors (FEDs) process the channel commands from the hosts and manage host access to cache. In the mainframe environment, the front-end directors perform CKDto-FBA and FBA-to-CKD conversion for the data in cache.
Table 2-1 lists the specifications and configurations for the front-end directors and specifies the number of channel connections for each configuration.
Back-End Directors and Array Domains The back-end director (BED) features control the transfer of data between the disk drives and cache. The BEDs are installed in pairs for redundancy and performance. The USP V can be configured with up to eight BED pairs, providing up to 64 concurrent data transfers to and from the disk drives. The USP VM is configured with one BED pair, which provides eight concurrent data transfers to and from the disk drives.
Figure 2-3 illustrates a conceptual array domain. All functions, paths, and disk drives controlled by one BED pair are called an “array domain.” An array domain can contain a variety of LVI and/or LU configurations. RAID-level intermix (all RAID types) is allowed within an array domain (under a BED pair) but not within an array group.
Hard Disk Drives The Universal Storage Platform V/VM uses disk drives with fixed-blockarchitecture (FBA) format. Table 2-3 lists and describes the currently available hard disk drives: 72 GB, 146 GB, 300 GB, 400 GB, and 750 GB. Table 2-3 Disk Drive Specifications Disk Drive Size Formatted Capacity* Revolution Speed Interface Interface Data Transfer Rate (maximum) 72 GB 71.50 GB 15,000 rpm FC 400 MB/s 146 GB 143.76 GB 15,000 rpm FC 400 MB/s 300 GB 288.
Power Supplies Each storage cluster is powered by its own set of redundant power supplies, and each power supply is able to provide power for the entire system, if necessary. Because of this redundancy, the Universal Storage Platform V/VM can sustain the loss of multiple power supplies and still continue to operate.
Control Panel and Emergency Power-Off Switch Control Panel Figure 2-4 shows the location of the control panel on the USP V, and Figure 2-5 shows the location of the control panel on the USP VM. Table 2-4 describes the items on the USP V/VM control panel. To open the control panel cover, push and release on the point marked PUSH.
Table 2-4 Name Control Panel (USP V and USP VM) Type Description SUBSYSTEM READY LED (Green) When lit, indicates that input/output operation on the channel interface is possible. Applies to both storage clusters. SUBSYSTEM ALARM LED (Red) When lit, indicates that low DC voltage, high DC current, abnormally high temperature, or a failure has occurred. Applies to both storage clusters. SUBSYSTEM MESSAGE LED (Amber) On: Indicates that a SIM (Message) was generated from either of the clusters.
Emergency Power-Off Switch Figure 2-6 shows the location of the emergency power-off (EPO) switch on the USP V (top right corner of the back side of controller frame). Figure 2-7 shows the location of the EPO switch on the USP VM (next to the control panel on the primary rack). Use the EPO switch only in case of an emergency. To power off the USP V/VM storage system in case of an emergency, pull the EPO switch up and then out towards you, as illustrated on the switch.
Intermix Configurations RAID-Level Intermix RAID technology provides full fault-tolerance capability for the disk drives of the Universal Storage Platform V/VM. The cache management algorithms enable the USP V to stage up to one full RAID stripe of data into cache ahead of the current access to allow subsequent access to be satisfied from cache at host channel transfer speeds.
Hard Disk Drive Intermix All hard disk drives (HDDs) in one array group (parity group) must be of the same capacity and type. Different HDD types can be attached to the same BED pair. All HDDs under a single BED pair must operate at the same data transfer rate (200 or 400 MB/sec), so certain restrictions apply.
2-18 Architecture and Components Hitachi Universal Storage Platform V/VM User and Reference Guide
3 Functional and Operational Characteristics This chapter discusses the functional and operational capabilities of the USP V.
RAID Implementation This section provides an overview of the implementation of RAID technology on the Universal Storage Platform V: • Array Groups and RAID Levels • Sequential Data Striping • LDEV Striping Across Array Groups Array Groups and RAID Levels The array group (also called parity group) is the basic unit of storage capacity for the USP V.
RAID-1 using 2D + 2D and 3390-x LDEVs Track 0 to Track 7 Track 0 to Track 7 Track 8 to Track 15 Track 8 to Track 15 Track 16 to Track 23 Track 16 to Track 23 Track 24 to Track 31 Track 24 to Track 31 Track 32 to Track 39 Track 32 to Track 39 Track 40 to Track 47 Track 40 to Track 47 Track 48 to Track 55 Track 48 to Track 55 Track 56 to Track 63 Track 56 to Track 63 Figure 3-1 Sample RAID-1 2D + 2D Layout RAID-5. A RAID-5 array group consists of four (3D+1P) or eight (7D+1P) disk drives.
RAID-5 using 3D + 1P and 3390-x LDEVs Track 0 to Track 7 Track 8 to Track 15 Track 16 to Track 23 Parity Tracks Track 32 to Track 39 Track 40 to Track 47 Parity Tracks Track 24 to Track 31 next 8 tracks Parity Tracks next 8 tracks next 8 tracks Parity Tracks next 8 tracks next 8 tracks next 8 tracks Figure 3-2 Sample RAID-5 3D + 1P Layout (Data Plus Parity Stripe) RAID-6. A RAID-6 array group consists of eight (6D+2P) disk drives.
LDEV Striping Across Array Groups In addition to the conventional concatenation of RAID-1 array groups (4D+4D), the Universal Storage Platform V supports LDEV striping across multiple RAID-5 array groups for improved LU performance in open-system environments. The advantages of LDEV striping are: • Improved performance, especially of an individual LU, due to an increase in the number of HDDs that constitute an array group.
LDEV#A LDEV#B B-1 B-2 B-3 B-4 A-1 A-2 A-3 A-4 Array group 1 (7D+1P) Array group 2 (7D+1P) LDEV#D LDEV#C D-1 D-2 D-3 D-4 C-1 C-2 C-3 C-4 Array group 3 (7D+1P) Array group 4 (7D+1P) LDEV Striping B-1 A-2 D-3 C-4 A-1 D-2 C-3 B-4 Array group 1 (7D+1P) Array group 2 (7D+1P) D-1 C-2 B-3 A-4 C-1 B-2 A-3 D-4 Array group 3 (7D+1P) Figure 3-4 Array group 4 (7D+1P) LDEV Striping Across 4 RAID-5 (7D+1P) Array Groups All disk drives and device emulation types are supported for LDEV striping.
CU Images, LVIs, and LUs CU Images The Universal Storage Platform V/VM is configured with one control unit image for each 256 devices (one SSID for each 64 or 256 LDEVs) and supports a maximum of 510 CU images (255 in each logical disk controller, or LDKC). The USP V/VM supports the following control unit (CU) emulation types: • 3990-6, 3990-6E • 2105, 2107 Note: The mainframe data management features of the USP V/VM may have restrictions on CU image compatibility.
Logical Units The Universal Storage Platform V/VM is configured with OPEN-V LU types. The OPEN-V LU can vary in size from 48.1 MB to 4 TB. For information on other LU types (OPEN-3, OPEN-9), contact your Hitachi Data Systems representative. For maximum flexibility in LU configuration, the USP V provides the Virtual LVI/LUN (VLL) and LUN Expansion (LUSE) features.
Storage Navigator The Hitachi Storage Navigator software communicates directly with the the Universal Storage Platform V and VM storage systems via a local-area network (LAN) to obtain storage system configuration and status information and send user-requested commands to the storage systems. Storage Navigator displays detailed storage system information and allows users to configure and perform operations on the Universal Storage Platform V/VM.
System Option Modes, Host Modes, and Host Mode Options System Option Modes To provide greater flexibility and enable the Universal Storage Platform V/VM to be tailored to unique customer operating requirements, additional operational parameters, or system option modes, are available. At installation, the modes are set to their default values (specified in below). Be sure to discuss these settings with your Hitachi Data Systems team.
Mode 269 Category Function High-Speed Format for Virtual LVI/LUN (VLL) (available for all device emulation types). Common Default MCU/RCU OFF – OFF – OFF MCU/RCU (1) High-Speed Format support: When redefining all LDEVs in an array group using VLL Volume Initialize or Make Volume operation, LDEV format, as the last process, will be performed in high speed.
Mode 346 Category Function If an HBA containing HP WWN being connected, the LUN Security function is operational by setting system option mode 346. Open Default MCU/RCU OFF – OFF – OFF – OFF – OFF – Mode 346 = ON: LUN Security is operational without host mode setting restriction. Mode 346 = OFF: LUN Security is operational only when host mode 03 is set to ON. Note: For a new storage system, system option mode 346 ON can be set as the default setting.
Mode 460 Category Function When turning off PS, the control information of the following software stored in shared memory will be backed up in SVP. After that, when performing volatile PS ON, the control information will be restored into shared memory from SVP.
Mode 471 Category Function SIMs that require action only by the user and not maintenance personnel are displayed on the Information of SVP and Storage Navigator and are not reported to maintenance personnel. This mode is provided for sites where it is required to report all SIMs to maintenance personnel. Common Default MCU/RCU OFF – OFF MCU/RCU OFF – OFF MCU/RCU OFF – Mode 471 = ON: Report SIMs to maintenance personnel. Mode 471 = OFF: Not report SIMs to maintenance personnel.
Mode 493 Category Mainframe Function The CUIR function requires that the SA_ID reported to the host is unique. The SA_ID value cannot be changed during online operations. To change the SA_ID value from normal to unique, set mode 493 to ON and then perform a power cycle*. Setting mode 493 to ON without performing a power cycle does not enable the function.
Mode 503 Category Function For the Install CV, Make Volume, and Volume Initialize functions of Virtual LVI/LUN, after LDEVs are installed, LDEV format is suppressed, and a blocked LDEV is created. Common Default MCU/RCU OFF – OFF – OFF RCU OFF MCU/RCU OFF MCU Also, VLL operations and the UVM Add LU and Delete LU operations are available even when an LDEV is blocked or being formatted.
Mode 676 Category Audit Log Function Store an audit log on the system disk as specified by the user. Default MCU/RCU OFF – OFF MCU/RCU OFF MCU/RCU OFF MCU/RCU Mode 676 = ON: Store an audit log onto the system disk. Mode 676 = OFF: Do not store an audit log onto the system disk. 677 OPEN and mainframe This option is used not to perform SM backup for saving battery consumption after planned PS Off. Mode 677 = ON: Mode 677 is available only when Mode 460 is ON.
Mode 690 Category Universal Replicator and Universal Replicator for z/OS Function This option is used to prevent Read JNL or JNL Restore when the Write Pending rate on RCU exceeds 60% as follows: When CLPR of JNL-Volume exceeds 60%, Read JNL is prevented. When CLPR of Data (secondary)-Volume exceeds 60%, JNL Restore is prevented. Default MCU/RCU OFF RCU OFF MCU/RCU OFF – Mode 690 = ON: Read JNL or JNL Restore is prevented when the Write Pending rate on RCU exceeds 60%.
Mode 704 Category OPEN and mainframe Function To reduce the chance of MIH, this option can reduce the priority of SI, VM, CoW Shapshot, Flash Copy or Resync copy internal IO requests so that host IO has a higher priority. This mode creates new work queues where these jobs can be assigned with a lower priority. Default MCU/RCU OFF – Mode 704 = ON: Copy processing requested is registered into a newly created queue so that the processing is scheduled with lower priority than host I/O.
Table 3-2 Modes 503 and 269: Storage Navigator Operations Mode 269 Mode 503 ON OFF Table 3-3 Operation Target of Operation ON OFF Virtual LVI/LUN (CVS) All LDEVs in a PG No format No format Virtual LVI/LUN (CVS) Some LDEVs in a PG No format No format Format PG is specified No operation No operation Format All LDEVs in a PG Low speed Low speed Format Some LDEVs in a PG Low speed Low speed Virtual LVI/LUN (CVS) All LDEVs in a PG High speed Low speed Virtual LVI/LUN (CVS) Some
Host Modes and Host Mode Options The Universal Storage Platform V/VM supports connection of multiple server hosts of different platforms to each of its ports. When your system is configured, the hosts connected to each port are grouped by host group or by target.
Mainframe Operations Mainframe Compatibility and Functionality In addition to full System-Managed Storage (SMS) compatibility, the Universal Storage Platform V and VM provide the following functionalities and support in the mainframe environment: • Sequential data striping • Cache fast write (CFW) and DASD fast write (DFW) • Enhanced dynamic cache management • Extended count key data (ECKD) commands • Multiple Allegiance • Concurrent Copy (CC) • Peer-to-Peer Remote Copy (PPRC) • FlashCopy •
Mainframe Configuration After physical installation of the Universal Storage Platform V or VM storage system has been completed, the user configures the storage system for mainframe operations with assistance as needed from the Hitachi Data Systems representative.
Open-Systems Operations Open-Systems Compatibility and Functionality The Universal Storage Platform V/VM supports and offers many features and functions for the open-systems environment, including: • Multi-initiator I/O configurations in which multiple host systems are attached to the same fibre-channel interface • Fibre-channel arbitrated-loop (FC-AL) and fabric topologies • Command tag queuing • Industry-standard failover and logical volume management software • SNMP remote storage system manage
Open-Systems Host Platform Support Table 3-5 lists the open-systems host platforms supported by the USP V/VM and the corresponding Configuration Guide for each host platform. The Configuration Guides provide information and instructions on configuring the USP V/VM disk devices for open-systems operations.
Open-Systems Configuration After physical installation of the Universal Storage Platform V/VM has been completed, the user configures the storage system for open-systems operations with assistance as needed from the Hitachi Data Systems representative.
Battery Backup Operations Figure 3-6 illustrates the two types of backup operations: backup mode and destage mode. Backup Mode (USP V and VM) When backup mode is chosen and a power failure occurs, storage system operations will continue normally for 200 milliseconds. If the power failure exceeds 200 ms, the storage system uses power from the batteries to back up the cache memory and shared memory for 36 hours or 48 hours, depending on the amount of cache memory.
AC Input Power Failure Occurs Detection of Power Failure Universal Storage Platform V: 48 hours: CM up to 128 GB 36 hours: CM 132 GB to 256 GB Universal Storage Platform VM: 36 hours 200 ms Backup Mode USP V/VM Power Failure Ç*1 Storage System Operating CM and SM are backed up by battery.
4 Troubleshooting This chapter provides basic troubleshooting information for the Universal Storage Platform V/VM and instructions for calling technical support.
General Troubleshooting The Hitachi Universal Storage Platform V and VM storage systems are not expected to fail in any way that would prevent access to user data. The READY LED on the control panel must be ON when the storage system is operating online. Table 4-1 lists potential error conditions and provides recommended actions for resolving each condition.
Service Information Messages The Universal Storage Platform V and VM generate service information messages (SIMs) to identify normal operations (for example, TrueCopy pair status change) as well as service requirements and errors or failures. For assistance with SIMs, please call the Hitachi Data Systems Support Center. SIMs can be generated by the front-end and back-end directors and by the SVP.
Calling the Hitachi Data Systems Support Center If you need to call the Hitachi Data Systems Support Center, make sure to provide as much information about the problem as possible, including: • The circumstances surrounding the error or failure • The exact content of any error messages displayed on the host system(s) • The error code(s) displayed on the Storage Navigator • The service information messages (SIMs) displayed on the Storage Navigator and the reference codes and severity levels of the re
A Units and Unit Conversions Table A-1 provides conversions for standard (U.S.) and metric units of measure associated with the Universal Storage Platform V/VM storage systems. Table A-1 Conversions for Standard (U.S.) and Metric Units of Measure From Multiply By: To Get: British thermal units (BTU) 0.251996 Kilocalories (kcal) British thermal units (BTU) 0.000293018 Kilowatts (kW) Inches (in) 2.54000508 Centimeters (cm) Feet (ft) 0.3048006096 Meters (m) Square feet (ft2) 0.
A-2 Units and Unit Conversions Hitachi Universal Storage Platform V/VM User and Reference Guide
Acronyms and Abbreviations A ACP ASTM ATA AVE ampere array control processor (another name for back-end director) American Society for Testing and Materials Advanced Technology Attachment standard average BC BED BS BSA BTU business continuity back-end director basic (power) supply bus adapter British thermal unit °C ca CC CCI CD CEC CFW CH CHA CHIP CHL CHP CHPID CIFS CKD CL CLI CLPR CMA CPU CSA CSW CU CV degrees Celsius cache Concurrent Copy Command Control Interface compact disk Canadian Electroacoust
CVS Custom Volume Size (another name for Virtual LVI/LUN) DASD dB(A) DFDSS DFSMS DFW DKA DKC DKP DKU DLM DNS dr DRAM DSF DTDS+ direct access storage device decibel (A-weighted) Data Facility Dataset Services Data Facility System Managed Storage DASD fast write disk adapter disk controller (DKC610 = USP V, DKC615 = USP VM) disk processor (microprocessors on the BED features) disk unit data lifecycle management domain name system drive dynamic random access memory Device Support Facilities Disaster Toleran
HDS HDU HGLAM Hi-Star HSN HWM Hz Hitachi Data Systems hard disk unit HiCommand Global Link Availability Manager Hierarchical Star Network Hierarchical Star Network high-water mark Hertz ICKDSF IDCAMS IML in.
ODM OEM OFC ORM OS Object Data Manager original equipment manufacturer open fibre control online read margin operating system PAV PB PC PCI P/DAS PDEV PDL PG PPRC PS Parallel Access Volume petabyte (see Convention for Storage Capacity Values) personal computer system power control interface PPRC/dynamic address switching (IBM mainframe software function) physical device Product Documentation Library parity group Peer-to-Peer Remote Copy (an IBM mainframe host software function) power supply RAB RAID RAM
UIM UL μm USP V USP VM unit information module Underwriters’ Laboratories micron, micrometer Hitachi Universal Storage Platform V Hitachi Universal Storage Platform VM VA VAC VCS VDE VDEV VM VOLID volser VSE VTOC volt-ampere volts AC VERITAS Cluster Server Verband Deutscher Elektrotechniker virtual device Virtual Machine (an IBM mainframe system control program) volume ID volume serial number Virtual Storage Extension (an IBM mainframe operating system) volume table of contents W WLM watt Workload Mana
Acronyms-6 Acronyms and Abbreviations Hitachi Universal Storage Platform V/VM User and Reference Guide
Index A alternate pathing scheme, 2-4 arbitrated-loop topology, 2-9 array domain, 2-10 group, 3-2 F B I fixed-block-architecture, 2-11 H hdd storage capacities, 2-11 Hierarchical Star Network, 2-3 back-end director, 2-9 intermix virtual lvi/lun, 2-17 C cache global, 3-24 memory battery backup, 2-6 switch cards, 2-3 canister mount, 3-2 commands cache fast write, 2-6 write inhibit, 2-14 conversion fba to ckd, 2-7 copy functions dasd on raid, 1-12 J Java applet, 3-9 L LDEV mapping scsi address, 3-
S scrubbing background, 2-11 service processor, 2-11 shared memory nonvolatile, 2-6 single points of failure, 2-4 spare disk drives max qty, 2-11 storage clusters, 2-4 U USP advanced features and functions, 1-8 USP hardware architecture, 2-5 W write penalty, 3-4 Index-2 Index Hitachi Universal Storage Platform V/VM User and Reference Guide
Hitachi Universal Storage Platform V/VM User and Reference Guide
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