IBM R/S6000 7012 300 Series Operator's Manual page 80

Update Disk Based Diagnostics
This service aid allows fixes (APARs) to be applied.
This task invokes the SMIT Update Software by Fix (APAR) task. The task allows the input
device and APARs to be selected. Any APAR can be installed using this task.
Certify Media
This task allows the selection of diskette or hardfiles to be certified.
Hardfile Certify
Certify reads all of the ID and data fields. It checks for bad data and counts all errors
encountered. If more than 10 hard data errors or more than 1 hard equipment error is
found, the user is prompted to replace the drive. One or less recovered data errors per
megabyte is normal. More than one recoverable data error per megabyte indicates that
the disk should be formatted and certified. Disk errors are not logged during certify.
Diskette Certify
This selection provides a way to verify the data written on a diskette. When this service
aid is selected, 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.
This task may be run directly from the AIX command line. The following usage statement
describes the syntax of the command:
diag –c –d <deviceName> –T "certify"
Format Media
This task allows the selection of diskettes or hardfiles to be formatted.
Hardfile Format
Writes all the disk. The pattern put on the disk is device dependent, i.e. some drives may
put all 0s, while some may put hexadecimal number 5F. No bad block reassignment
occurs.
Hardfile Format and Certify
Does the same as format. After Format is completed, Certify is run. This Certify
reassigns all bad blocks encountered.
Hardfile Erase Disk
This option can be used to overwrite (remove) all data currently stored in
user–accessible blocks of the disk. The Erase Disk option writes one or more patterns to
the disk. An additional option allows data in a selectable block to be read and displayed
on the system console.
To use the Erase Disk option, specify the number (0–3) of patterns to be written. Select
the patterns to be written; the patterns are written serially. That is, the first pattern is
written to all blocks. Then the next pattern is written to all blocks, overlaying the previous
pattern. A random pattern is written by selecting the "Write random pattern?" option.
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Operator Guide