User manual
SANtools® S.M.A.R.T. Disk Monitor (SMARTMon-UX)216
SANTOOLS® is registered in US Patent and Trademark Office No 3,107,854 All rights reserved.
SSP Target Enabled: No No No No No No No No
Port Configuration: Auto Auto Auto Auto Auto Auto Auto Auto
Target IDs per enclosure: 1
Persistent mapping: Disabled
Physical mapping type: Direct Attach
Target ID 0 reserved for boot: No
Starting slot (direct attach): 0
Target IDs (physical mapping): 0
Interrupt Coalescing: Enabled, timeout is 16 us, depth is 4
Persistent Mappings
-------------------
No persistent entries found
SAS1068's phylinks are (Port 0,1,...,8): 1.5 G, down, 3.0 G, down, down, 3.0 G, down, down
Discovered ST3500630NS S/N "9QG43RVS" on RAID (Not Enabling SMART) (476940 MB)
Discovered WDC WD2500AAJS-22VTA0 S/N "WD-WMART1663590" on RAID (Not Enabling SMART) (238475 MB)
Discovered LSILOGIC Logical Volume S/N "" on RAID (Not Enabling SMART) (69618 MB)
1 volume is active, 2 physical disks are
Volume 0 is Bus 0 Target 4, Type IM (Integrated Mirroring)
Volume Name:
Volume WWID: 0a0cade5ed79d4ab
Volume State: degraded, enabled
Volume Settings: write caching disabled, auto configure
Volume draws from Hot Spare Pools: 0
Volume Size 69618 MB, Stripe Size 0 KB, 2 Members
Volume Device:
Member 1 is PhysDisk 0 at (Bus 0 Target 5)
Discovered HP DF072BAFDT S/N "BJL4P86004TB0862" at Bus 0 Target 5 (70007 MB) state=online PhysDisk=0
Discovered HP DF072BABUD S/N "J2YD2PCA" at Bus 0 Target 8 (70007 MB) state=missing, out of sync PhysDisk=1
Volume 0 State: degraded, enabled
Volume 1 State: optimal, disabled
(Additional output follows, but was truncated as it isn't relevant to the -zd command)
There are several points of interest in this dump.
· Note that the HP Disk S/N J2YD2PCA shows state=missing. That is because this disk is no longer plugged into the system, and really is missing. The RAID controller remembers the serial number, and smartmon-ux reports it, so you can see what was manually removed).
· Some ports are running at 1.5 Gbit/sec, others are running at 3 Gbit/sec
· The logical device is degraded (one disk is missing from the RAID-1 mirror)
1.53 Background Media Scan Functions
Reasonably current SCSI, FC and SAS disk drives (such as the Seagate 10K.5 family and above) have a
programmable feature that lets the disk be configured so it scans the disk for correctable errors during idle time. If
your disk has this firmware and capability, you can us the software to configure, disable, and report test results.
What is Background Scanning
The best way to describe background media scanning and explain the benefits comes from Seagate's patent
#7490261 - Background media scan for recovery of data errors. The following abridged text comes from the published
patent itself:
"Media defects can arise at any sector on your disk drive during the lifetime of the storage system (grown
defects). These grown defects include, for example, invading foreign particles which become embedded
onto the surface of the disc, or external shocks to the storage system which can cause the transducer to
nick or crash onto the surface of the disc. Defective sectors pose either temporary or permanent data
retrieval problems.
Read errors are typically determined when the host computer attempts to retrieve user data from a sector
and one or more uncorrected errors exist. Typically, the data storage system includes internally
programmed error recovery routines such that upon determination of a read error, the data storage
system applies a variety of corrective operations to recover user data. Occasionally, the data storage
system exhausts all available corrective operations for recovery of data without success. The data
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