All MIBs › CPQSCSI-MIB › cpqScsiPhyDrvUsedReallocs
cpqScsiPhyDrvUsedReallocs
Module: CPQSCSI-MIB
OID (symbolic): CPQSCSI-MIB::cpqScsiPhyDrvUsedReallocs
OID (numeric): 1.3.6.1.4.1.232.5.2.4.1.1.22
Node type: OBJECT-TYPE
Type: Counter
Access: read-only
Description: SCSI Physical Drive Used Reallocation Sectors.
This shows the number of sectors of the reallocation area that have been used by the physical drive over the life of the drive.
Because of the nature of magnetic disks, certain sectors on a drive may have media defects. The reallocation area is part of the disk drive that the drive manufacturer sets aside to compensate for these defects. The drive writes information addressed from these unusable sectors to available sectors in the reallocation area.
If all of the reserved sectors have been used, then there is no way for the drive to remap bad sectors and the drive will start failing. Unfortunately, the number of reallocation sectors originally reserved for this purpose is drive specific and you must contact the drive vendor for these values.
If the current value starts to approach the maximum reserved you may wish to replace the drive before it fails.
What is cpqScsiPhyDrvUsedReallocs?
This counter shows how many sectors from the drive's built-in reallocation (spare sector) area have been used to compensate for media defects over the drive's life. Because reallocation area is finite, a rising count signals the drive is accumulating bad sectors and consuming its remaining spare capacity. For example, an admin seeing usedReallocs climb steadily on a disk would treat it as an early warning to plan replacement before the spare area is exhausted.
Examples
Walk all instances (SNMPv2c):
snmpwalk -v2c -c public <target> 1.3.6.1.4.1.232.5.2.4.1.1.22 snmpwalk -v2c -c public <target> CPQSCSI-MIB::cpqScsiPhyDrvUsedReallocs
Get a specific instance (index 1):
snmpget -v2c -c public <target> 1.3.6.1.4.1.232.5.2.4.1.1.22.1 snmpget -v2c -c public <target> CPQSCSI-MIB::cpqScsiPhyDrvUsedReallocs.1
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OID Breakdown
Upper-level ancestors (7 from the standard OID tree / other modules)
| Numeric OID | Name | Module |
|---|---|---|
| 1 | iso | LANART-AGENT |
| 1.3 | org | AirPair-MIB |
| 1.3.6 | dod | AirPair-MIB |
| 1.3.6.1 | internet | AirPair-MIB |
| 1.3.6.1.4 | private | AirPair-MIB |
| 1.3.6.1.4.1 | enterprises | AirPair-MIB |
| 1.3.6.1.4.1.232 | compaq | COMPAQ-ID-REC-MIB |
| Numeric OID | Name | Module |
|---|---|---|
| 1.3.6.1.4.1.232.5 | cpqScsi | CPQSCSI-MIB |
| 1.3.6.1.4.1.232.5.2 | cpqScsiComponent | CPQSCSI-MIB |
| 1.3.6.1.4.1.232.5.2.4 | cpqScsiPhyDrv | CPQSCSI-MIB |
| 1.3.6.1.4.1.232.5.2.4.1 | cpqScsiPhyDrvTable | CPQSCSI-MIB |
| 1.3.6.1.4.1.232.5.2.4.1.1 | cpqScsiPhyDrvEntry | CPQSCSI-MIB |
| 1.3.6.1.4.1.232.5.2.4.1.1.22 | cpqScsiPhyDrvUsedReallocs | CPQSCSI-MIB |