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ssa_certify Command
Purpose
v To certify the physical disk drive so that data can be read from, or written to, the disk
drive without problems.
v To certify a RAID-5 array to determine whether any array logical block addresses
(LBAs) have been as unreadable.
Syntax
Description
If the ssa_certify command is issued to a pdisk, it uses the ISAL_Read, ISAL_Write,
or ISAL_Characteristics command to certify the disk drive. It returns 0 unless a
nonmedia-related problem occurs. If such a problem occurs, the ssa_certify command
prints a message to stderr.
If a media-related problem occurs, and the disk drive can perform automatic reassign
operations, the command attempts to reassign soft-error blocks.
If the attempt to reassign the soft-error blocks fails, if the block has a hard media error,
or if the disk drive cannot perform automatic reassign operations, the ssa_certify
command returns 0, but prints, to stdout, the LBA of the failing block in decimal,
followed by the word "Failed". For example:
If the disk drive cannot perform automatic reassign operations:
1. Stop all operations to the disk drive.
2. Use the -a flag, and rerun the Certify operation.
If the certify operation is successful, the ssa_certify command returns no output.
If the ssa_certify command is issued to a RAID-5 hdisk that contains LBAs that have
been marked as unreadable, an LBA or an LBA count is printed to stout. For example:
Flags
-l pdisk
-a
Specifies the physical disk drive (pdisk) that the user wants to certify.
Enables the reassign action on devices that cannot already perform automatic
Chapter 16. Using the SSA Command Line Utilities
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