SUMMARY: Problem with hard disk

From: Alfredo Sola (asola@intelideas.com)
Date: Tue Jan 07 1997 - 11:28:19 CST


        The question:

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I've got a Netra i4 with Solaris 2.5.1. It has an external box with a 2 Gb
Quantum Fireball TM hard disk and a 2 Gb HP DAT. It works just fine most of
the time, except when the following happens:

WARNING: /iommu@0,10000000/sbus@0,10001000/espdma@4,8400000/esp@4,880000

0 (esp0):
        Disconnected tagged cmds (15) timeout for Target 5.0
                                                            WARNING:
/iommu@0,10

000000/sbus@0,10001000/espdma@4,8400000/esp@4,8800000/sd@5,0 (sd5):
        SCSI transport failed: reason 'timeout': retrying command

WARNING:
/iommu@0,10000000/sbus@0,10001000/espdma@4,8400000/esp@4,8800000/sd@5,0

 (sd5):
        SCSI transport failed: reason 'reset': retrying command

        then, the hard disk thinks for a while (somewhat less than a
minute) and resumes working.

        This failures are very unoften; the last one happened on a period
of very low activity, some minutes ago (just one or two users were using
the proxy cache, which resides in this disk).

        Any clues besides cabling and the like? I have already checked
that. Ah, yes, the parameters:

# New disk/partition type saved on Thu Dec 5 22:14:38 1996
#
disk_type = "QUANTUM-FIREBALL_TM2110S-300N" \
         : ctlr = SCSI : ncyl = 6483 : acyl = 2 : pcyl = 6485 \
         : nhead = 4 : nsect = 159 : rpm = 4500

partition = "sda2" \
         : disk = "QUANTUM-FIREBALL_TM2110S-300N" : ctlr = SCSI \
         : 0 = usr, wm, 0, 4123188 : 2 = backup, wm, 0, 4123188

        They were guessed by John DiMarco's scsiinfo (thanks, John).

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        The contributors, in chronologial order:

Birger A. Wathne <birger@Vest.Sdata.No>
Darryl Levesque <darryl@tor.digidyne.ca>
Mark Hargrave <root@wisdom.maf.nasa.gov>
Bismark Espinoza <bismark@alta.Jpl.Nasa.Gov>
Chan Ling Ling <llchan@kdupg.edu.my>

        The answers (short):

- Disable tagged queuing
- Cabling problem, esp. length
- DAT drive must be at the end of the chain; remove slick active
terminator.
- Sun patch 101378
- Plain incompatibility

Saludos,

Alfredo Sola.



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