HP StorageWorks Command Console V2.5 User Guide (AA-RV1UA-TE, March 2005)
Table Of Contents
- Contents
- About this Guide
- About SWCC
- Using Command Console
- Setting Up Notification
- Required Components for Notification
- Setting Up Pager Notification
- Using SWCC with a Third-Party Storage Management Program
- Using Event Logging on the Client System to Monitor Your Subsystem
- Interpreting Agent Email Messages
- About Event Information Fields
- Mapping State Change Digits to RAID System Components
- Table 11: State Change Digit Position and Corresponding RAID system Component
- The First Digit of the State Change Field (Overall RAID System)
- The Second Digit of the State Change Field (Disks)
- The Third Digit of the State Change Field (Power Supply)
- The Fourth Digit of the State Change Field (Fans)
- The Fifth Digit of the State Change Field (Battery)
- The Sixth Digit of the State Change Field (Temperature)
- The Seventh Digit of the State Change Field (This_Controller)
- The Eighth Digit of the State Change Field (Communications LUN)
- The Ninth Digit of the State Change Field (Other_Controller)
- The 10th Digit of the State Change Field (External Factors)
- The 11th Digit of the State Change Field (Logical Units)
- Using the Storage Window
- Why Use the Storage Window?
- Configuring a Controller
- Creating Virtual Disks
- Deleting Virtual Disks
- Modifying Virtual Disks
- Configuring the Operating System to Recognize Virtual Disk Changes
- Setting Passwords and Security Options (Network Only)
- Managing and Creating Spare Devices
- Using Configuration Files
- Understanding the Icons
- CLI Window
- Integrating SWCC with Insight Manager
- Troubleshooting
- Troubleshooting Connection Problems
- Invalid Network Port Numbers During Installation
- Network Port Assignments for UNIX-Client/Server Systems
- DHCP and WINS
- Connecting Via the Host SCSI Port
- “Access Denied” Message
- Adding New System by Using Internet Protocol Address May Cause Client to Stop Responding
- “No Agent Running” Message When Adding System to the Navigation Tree
- Troubleshooting the Client
- Authorization Error When Adding an Agent System
- Cannot Open Storage Window
- Client Hangs When LUN Is Deleted
- CLI RUN Commands
- Event Notification for Subsystems Connected to a Client System
- Invalid or Missing Fault Displays and Event Logs
- Pager Notification Continues After Exiting the Command Console Client
- Reconfiguration After Controller Replacement
- Some Graphics Do Not Scale Well with Large Fonts
- Starting Client from the Command Prompt
- Warning Message Windows
- Virtual Disk Recovery from a Configuration File
- Troubleshooting the HS-Series Agents
- Cluster Integration for the HS-Series Agents
- Troubleshooting Connection Problems
- Using the Command Console LUN
- Interpreting SNMP Traps
- Glossary
- Index
Glossary
136 Command Console V2.5 User Guide
RAID 0+1 RAID 0+1 combines the striping of RAID 0 and the mirroring
of RAID 1 to provide the best combination of high performance
and high availability. A RAID 0+1 virtual disk is also known as
a striped mirrored virtual disk.
In a RAID 0+1 virtual disk, each RAID 0 stripe is mirrored to
one or more duplicate device sets. This technique allows much
faster read and write performance than does reading and writing
to a single device. A six-device, RAID 0+1 virtual disk has
potentially three times the bandwidth of a single device because
three separate, small pieces of host data move in parallel.
In addition, the data is completely mirrored to one or more
device sets so there is complete data redundancy for very high
availability.
A RAID 0+1 virtual disk offers the highest performance and the
highest availability of any RAID virtual disk type, but its cost is
high. Such a configuration requires at least twice the number of
devices that a RAID 0 configuration requires.
RAID 1 RAID 1 is the industry-standard term for device mirroring. A
RAID 1 virtual disk is also called a mirrored virtual disk.
In a RAID 1 virtual disk, host data is written as a single large
block to one device and the data is mirrored to one or more
duplicate disks.
A RAID 1 virtual disk provides very high availability because
the data is completely mirrored to one or more devices. Its
performance is no better than that of a single device, however,
because the data is transferred as one large block to and from
these devices.