SLC scsi disk problem

[Gehri Grimaud]

> 	esp0:	0.0 data transfer failure
> 		Stat=0x10<XZERO>, Intr=0x10<BUS>
> 		Last state='UNKNOWN', Last cmd='dma tran_info'
> 		DMA addr=0xff01a000, last=0xff018000;Dma CSR=0x80000000
> 		Mapped Dma Space:
> 			Base = 0xff018000 Count = 0x2000
> 		Transfer History:
> 			Base = 0xff018000 Count = 0x2000
> 	sd3:	SCSI transport failed: reason 'reset': retrying command
> 
> 
> Disk label:	<CDC Wren III 94161-155 cyl 965 alt 2 hd 9 sec 35>

I had a similar peoblem with my SLC.  I have a Fujitsu M2263S 670 MB
drive.  I would get the occational SCSI reset.  No probem since things
seemd to run normaly after that.  Then I tried to dump my file system to
tape.  No good!  When the tape drive sees the SCSI reset it unloads and
rewinds the tape!  This would not do!  After much adjustment of jumpers, I
narrowed the problem to the Read-Ahead Cache feature on my drive.  Since
disabling this feature, my drive has not timed out once.  I hope this is
useful.

Gehri Grimaud                           gehri at cc.usu.edu
Utah State University                   gehri at usu.bitnet
Office of Computer Services             tel. (801) 750-2392
UMC 3700
Logan, Utah  84322