Manual page for REASB(8)
reasb - reassign SCSI logical block
SYNOPSIS
/usr/etc/reasb
raw_device
SCSI_block_number
[
-r
]
DESCRIPTION
This command causes a logical block on a SCSI disk drive to be reassigned to a new location on the disk. The actual relocation and reassignment is performed by the disk drive (as opposed to the operating system). The algorithms used to allocate spare sectors vary between drive manufacturers.
SCSI_block_number
is generally obtained from console error information, printed by the SCSI disk driver upon detection of media errors reported by the drive during normal operation.
OPTIONS
- -r
-
When this flag is specified,
20 attempts are made to read the current contents of
SCSI_block_number.
If any one read attempt is successful, the reassignment takes place
and then the previously read contents of
SCSI_block_number
are written back to the newly relocated sector.
If all 20 read attempts result in errors, the user will be notified and
asked whether or not to continue with the reassign block command.
Responding with anything other than 'y' results in the operation
being aborted with no further I/O.
FILES
/dev/rsd?
SEE ALSO
sd(4)
BUGS
Some SCSI drives do not implement the SCSI Reassign Block command;
reasb
will fail on these drives. Also, blocks in a given area of a disk can in general only be reassigned a small number of times before the drive runs out of spare locations. The
reasb
command should be used sparingly.
The
reasb
command takes a decimal SCSI block number as an argument,
but the sd driver reports media errors in hexadecimal.
Created by unroff & hp-tools.
© somebody (See intro for details). All Rights Reserved.
Last modified 11/5/97
