Well considering the hardware, I'm impressed that you've got it cooking at all. As far as termination goes, there's really only one place to check. It sounds to me like you've got a single scsi device on that chain. Since the AIC 78xx auto terminate their end by default, that shouldn't be a problem, so all you have to do is double check that the drive itself is either properly set up to terminate the chain or that there is a terminator after it. You can also play with the powered termination if that drive supports it, but I honestly have never been able to figure out when that is necesary, and when it isn't. Just as an FYI ... I had the exact same problem with my 386 back in the day, where it would just freak out every so often. After moving that drive off of the wimpy little trantor card that it was on, and putting it in a real case (with better cooling) I never recieved the errors again. So to sum up. Check to make sure the drive is staying cool. Check to make sure the drive is terminated. Play with termination power to see if it makes that problem go away. And when all else fails, say f**k it, and just live with the random log messages. Hope that helps a little. Cheers, Lee On Wed, 22 May 2002, Chuck Homic wrote:
Hey guys... from my syslog:
May 22 17:05:28 biznatch kernel: scsi : aborting command due to timeout : pid 5591, scsi0, channel 0, id 2, lun 0 Read (10) 00 00 61 01 11 00 00 80 00 May 22 17:05:28 biznatch kernel: (scsi0:0:2:0) SCSISIGI 0x44, SEQADDR 0x110, SSTAT0 0x0, SSTAT1 0x3 May 22 17:05:28 biznatch kernel: (scsi0:0:2:0) SG_CACHEPTR 0x0, SSTAT2 0xf, STCNT 0xe8 May 22 17:05:29 biznatch kernel: SCSI host 0 abort (pid 5591) timed out - resetting May 22 17:05:29 biznatch kernel: SCSI bus is being reset for host 0 channel 0. May 22 17:05:30 biznatch kernel: (scsi0:0:2:0) Synchronous at 10.0 Mbyte/sec, offset 15.
Can anyone who knows more about SCSI tell me what can cause a command timeout, etc... Do I need a terminator or something? I thought my configuration was right, since I can transfer hundreds of megabytes between errors. Can a problem with terminator configuration even be that subtle? (Forgive a SCSI newbie!)
So, the error resolves itself in 7 seconds, and no data is lost, so maybe I don't care. ;) Really, the problem is that it muddies up the console when it happens, and I have to press ^a l.
The system is a decade-old experimental dual Pentium-133 running 2.2.21 SMP, with an onboard AIC-7870 (with a BIOS that says "EVALUATION VERSION. DO NOT DISTRIBUTE.") and a 4GB Western Digital Enterprise that someone told me was dead. Heh... okay that sounds pretty bad.
So, I guess only pay attention to the terminator question. ;)
Thanks.
-Chuck
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-- Lee Keyser-Allen lkeyser@wpi.edu WPI CS 2002