Problem with CDC Wren V scsi disk - advice requested

[Koos Remigius]

>From article <ccfj.667889673 at hippo>, by ccfj at hippo.ru.ac.za (F.F. Jacot Guillarmod):
> 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
> 
> The system is still running, though.
> 
> Questions:
> 
> 1 - what is going on?  (nobody around here knows all that much about
>     scsi's :-()
> 
> 2 - what needs to be done to fix the problem?
> 
> 3 - which FM's should I be reading to find out more?
> 
> Thanks
> --
>      F.F.  Jacot Guillarmod - Computing  Centre - Rhodes  University
>      Artillery Road - P.O Box 94 - Grahamstown - 6140 - South Africa
>      Internet: ccfj at hippo.ru.ac.za    Phone: +27 [0]461 22023 xt 284
>      uucp: ..!uunet!m2xenix!quagga!hippo!ccfj  Fax: +27 [0]461 25049


Item 1 >  cmd : 0A 01 2B E8 02 00 
	meaning: Write 2 blocks, starting at block $12BE8 = 76776

		During the write an unrecoverable error occured.

	sense:	F0 00 03 00 01 1B E9 0A 00 00 00 00 10 00
	meaning: There is a media error at block $12BE9 = 76777, the
		10 means < ID CRC or ECC error. >

Item 2 > To fix this, reformat the disk or replace the bad block.

Item 3 > Any book that describes the SCSI command's should help.


Cheers,

	Koos

-- 
Koos Remigius			      kr at mh.nl via internet backbones
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