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Date:      Thu, 28 Jan 1999 21:19:27 +0100 (CET)
From:      J.Klaus@sh.cvut.cz
To:        FreeBSD-gnats-submit@FreeBSD.ORG
Subject:   i386/9759: Tar process hangs on buggy tapes
Message-ID:  <199901282019.VAA14451@hell.sh.cvut.cz>

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>Number:         9759
>Category:       i386
>Synopsis:       Tar process hangs on buggy tapes
>Confidential:   yes
>Severity:       serious
>Priority:       high
>Responsible:    freebsd-bugs
>State:          open
>Quarter:        
>Keywords:       
>Date-Required:
>Class:          sw-bug
>Submitter-Id:   current-users
>Arrival-Date:   Thu Jan 28 12:20:00 PST 1999
>Closed-Date:
>Last-Modified:
>Originator:     Jaroslav Klaus
>Release:        FreeBSD 2.2.8-STABLE i386
>Organization:
>Environment:

dmesg:
  ncr0 <ncr 53c810 fast10 scsi> rev 1 int a irq 9 on pci0:11:0
  (ncr0:4:0): "UNISYS M1017UD-4MM 316H" type 1 removable SCSI 2
  st0(ncr0:4:0): Sequential-Access 
  st0(ncr0:4:0): 5.0 MB/s (200 ns, offset 8)
  density code 0x13,  drive empty

my kernel config:
  controller      ncr0
  controller      scbus0
  device          st0

>Description:

I have buggy 4mm DDS-90 tape (AIX reports I/O error after cca
800MB). After 800MB of writting data to the tape, tar process
hangs and device is busy. Restart is needed.

ps:
 5210  p1- DE     0:00.00  (tar)

/var/log/messages:
  Jan 28 17:42:47 **** /kernel: ncr0: timeout ccb=f11be800 (skip)
  Jan 28 17:44:52 **** /kernel: ncr0: SCSI phase error fixup: CCB
  already dequeued
  Jan 28 17:44:59 **** /kernel: ncr0: timeout ccb=f11be800 (skip)

>How-To-Repeat:

To store data by tar to buggy tape on system with ncr 53c810 and
UNISYS M1017UD-4MM 316H tape drive (it is one of SONY tape
drives).

>Fix:
	
	

>Release-Note:
>Audit-Trail:
>Unformatted:

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