IBM B50 - Manual (Page 194)

Replace Controller
Use this selection when it is necessary to replace a controller in the array.
Flash SK-NET FDDI Firmware
This task allows the Flash firmware on the SysKonnect SK-NET FDDI adapter to be
updated.
Format Media
This task allows the selection of diskettes, hardfiles, or optical media to be formatted.
Each selection is described below.
Hardfile Attached to SCSI Adapter (non-RAID)
Hardfile Format
Writes all of 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 function as Format. After the 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.
Note: The Erase Disk service aid has not been certified as meeting the
Department of Defense or any other organizations security guidelines.
9-22 7046 Model B50 User's Guide