IBM pSeries 615 Model 6C3, User Manual

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Hard files can be connected either to a SCSI adapter (non-RAID) or a PCI SCSI RAID adapter. The usage
and criteria for a hard file connected to a non-RAID SCSI adapter are different from those for a hard file
connected to a PCI SCSI RAID adapter.
Certify Media can be used in the following ways:
v
Certify Diskette
This selection enables you to verify the data written on a diskette. When you select this service aid, a
menu asks you to select the type of diskette being verified. The program then reads all of the ID and
data fields on the diskette one time and displays the total number of bad sectors found.
v
Certify DVD-RAM media
This selection reads all of the ID and data fields. It checks for bad data and counts all errors
encountered. If an unrecovered error occurs, or recovered errors exceed the threshold value, the data
on the media should be transferred to other media and the original media should be discarded.
The Certify service aid will display the following information:
– Capacity in bytes
– Number of Data Errors Not Recovered
– Number of Equipment Check Errors
– Number of Recovered Errors
If the drive is reset during a certify operation, the operation is restarted.
If the drive is reset again, the certify operation is terminated, and the user is asked to run diagnostics on
the drive.
This task can be run directly from the AIX command line. See the following command syntax: diag -c
-d -T certify
Flag Description
-c No console mode
-d Specifies a device
-T Specifies the certify task
v Certify Hardfile Attached to a Non-RAID SCSI Adapter
This selection reads all of the ID and data fields. It checks for bad data and counts all errors
encountered. If there are unrecovered data errors that do not exceed the threshold value, the hard file
must be formatted and certified. If the unrecovered data errors, recovered data errors, recovered and
unrecovered equipment errors exceed the threshold values, the disk must be replaced.
It also makes 2000 random seeks after the read certify of the surface completes. If a disk times out
before finishing the random seeks, then the disk needs to be replaced. The random seeks also count all
errors encountered.
The Certify service aid will display the following information:
– Drive capacity in megabytes.
– Number of Data Errors Recovered.
– Number of Data Errors Not Recovered.
– Number of Equipment Checks Recovered.
– Number of Equipment Checks Not Recovered.
This task can be run directly from the AIX command line. See the following command syntax: diag -c
-d deviceName -T "certify"
Flag Description
-c No console mode
-d Specifies a device
-T Specifies the certify task
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pSeries 610 Model 6C3 and Model 6E3 User’s Guide