srm@unify.com (Steve Maraglia) (10/08/90)
I recently installed 3 Sun 4/20's (SLC's), each with a 150Mb external scsi
disk (Seagate Wren III model 94161). We've been getting the follow disk
errors on all three systems. On one system the errors occur 3-4 times a
day and the others 1-2 errors every couple days. They don't appear to be
fatal errors as the system continues to run fine, however, I'm very
curious to know if anyone else has experienced this problem and if anyone
can explain why this is happening?
/usr/adm/messages:
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>
Steve Maraglia internet: srm@unify.com
Unify Corporation ..!{uunet,csusac,pyramid}!unify!srm
3870 Rosin Court Sacramento, CA 95834 (916) 920-9092 GEHRI@cc.usu.edu (Gehri Grimaud) (11/02/90)
> 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@cc.usu.edu Utah State University gehri@usu.bitnet Office of Computer Services tel. (801) 750-2392 UMC 3700 Logan, Utah 84322