[comp.periphs.scsi] Problem with CDC Wren V scsi disk

neese@adaptx1.UUCP (03/15/91)

>/* ---------- "Problem with CDC Wren V scsi disk -" ---------- */
>We are using a 300 megabyte CDC Wren V + AHA1542A controller on a 386
>clone running SCO Xenix 2.3.2.  All of a sudden, the following errors
>are getting logged:
>
>Fri Mar 1 8:25:34
>
>scsi: ERROR: on disk dev=1/40 ha=0 id=0 lun=0 block=37364
>	sector=76776, cylinder/head = 37/31
>	hst 00 ust 02
>	AHA-1540  cmd  : 0A 01 2B E8 02 00
>	AHA-1540 sense : F0 00 03 00 01 2B E9 0A 00 00 00 00 10 00

This is a hard media error on a write command.  More specifically, it is
a CRC error.  You can get rid of this, on this particular drive, by enabling
the automatic write reallocation bit in the mode page of this drive.  Next
time a write to this block occurs, the drive will reallocate it and replace
it with a good one.  By default, this bit is turned off.
You will need SCSICNTL to do this, unless you want to write the software
yourself.

			Roy Neese
			Adaptec Senior SCSI Applications Engineer
			UUCP @  neese@adaptex
				uunet!cs.utexas.edu!utacfd!merch!adaptex!neese