HP 7936 Support Manual page 135

HELP
INIT MEDIA
OPER
PRESET
READ FULL
SECTOR
REQSTAT
RESET STATS
REV
ROERT
Troubleshooting and Diagnostics
7936 and 7937
Table 8-1. External Exerciser Commands (3 of 4)
No device-specific information.
This utility destroys all user data. When executed, a worst case data pattern
(22 hex) is written in the data field of all of the user sectors, and header in-
formation is recorded in the first six bytes of each sector. The postamble is
also rewritten to reflect an ECC pattern matching the data.
Options allow the user to retain only primary spares (P), retain primary and
secondary spares (A), or initialize only the maintenance tracks (M). All disc
logs are cleared when performing an INIT MEDIA operation.
No device-specific information.
No device-specific information.
Returns all of the data in a sector including the 6 header bytes, 2 CRC
bytes, and 12 ECC bytes. The sector address value used when executing this
command represents a physical sector address. If the track on which the
specified sector resides has undergone a sparing operation, the logical and
physical sector addresses may not correspond.
No device-specific information.
Clears cache table on 7936XP /7937XP drives.
No device-specific information.
During an ERT the ECC circuit is functioning, but no data correction takes
place. Retrys are not performed during an ERT. No offset is allowed when
performing an ERT. The format for the printed error information is
defined in the details for the ERT LOG command.
8-13