Reset Disk Performance Statistics
98 DD400 Series Restorer User Guide
Reset Disk Performance Statistics
To reset disk performance statistics to zero, use the disk reset performance operation. See
“Display Disk Performance Details” on page 97 for displaying disk statistics.
disk reset performance
Display Disk Reliability Details
Disk reliability information details the hardware state of each disk. The information is generally for
the use of Data Domain support staff when troubleshooting.
Disk is the disk ID number, from 1 (one) to 15.
The ATA Bus Soft Err column shows uncorrected raw UDMA CRC errors.
The Command Timeouts counts times that the operating system SCSI midlayer registers that a
command timed out.
Command Faults columns shows counts of commands that the operating system SCSI midlayer
registers as leading to read failures, write failures, and other command failures.
The Drive Soft Err columns show the number of errors corrected by the disk’s software error
correction control. The Soft column is the number of off track errors. The Err column is the number
of soft ECC errors.
Awaiting Realloc shows the number of sectors on a drive that have returned at least one error, but
that are not yet confirmed as bad.
Already Realloc indicates the end of the useful disk lifetime when the number of reallocated sectors
approaches the vendor-specific limit. The limit is 2000 for Western digital disks and 2000 for
Hitachi disks. Use the
disk show config command to display the disk vendor.
Temp shows the current temperature of each disk in degrees centigrade. The allowable temperature
range for disks is from 5 degrees centigrade to 58 degrees centigrade.
Display
Use the disk show reliability data operation or click Disks in the left panel of the DDR
Manager to see the reliability statistics.
disk show reliability-data
The display is similar to the following:
# disk show reliability-data
Disk ATA Bus Command Command Drive Awaiting Already Temp
Soft Err Timeouts Faults Soft Err Realloc Realloc
------ -------- -------- ------- -------- ------- ------- -----
disk1 0 0 0/0/0 6/0 0 0 28 C
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