Date: Sat, 25 Sep 1999 03:07:39 +0200 (CEST) From: Phil Regnauld <regnauld@S44.eu.org> To: FreeBSD-gnats-submit@freebsd.org Subject: kern/13940: Panic with dd on block/"cooked" devices using 3.3-RELEASE Message-ID: <199909250107.DAA11769@flow.S44.eu.org>
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>Number: 13940
>Category: kern
>Synopsis: Panic with dd on block/"cooked" devices using 3.3-RELEASE
>Confidential: no
>Severity: critical
>Priority: medium
>Responsible: freebsd-bugs
>State: open
>Quarter:
>Keywords:
>Date-Required:
>Class: sw-bug
>Submitter-Id: current-users
>Arrival-Date: Fri Sep 24 18:10:01 PDT 1999
>Closed-Date:
>Last-Modified:
>Originator: Phil Regnauld
>Release: FreeBSD 3.3-RELEASE i386
>Organization:
Freenix User Group
>Environment:
PII-400, 128 MB RAM, NCR875 UW SCSI, 1 x 4.5 GB SCSI IBM,
2 x 10 GB EIDE QUANTUM, 3.3-RELEASE
>Description:
When using dd to copy a block device to another (i.e.:
/dev/wd0a -> /dev/wd2a for example), the system panics.
Greg Lehey <grog@lemis.com> is aware of the problem.
>How-To-Repeat:
# dd if=/dev/rwd0a of=/dev/rwd2a bs=1024k conv=notrunc
dd: /dev/rwd2a: Read-only file system
1+0 records in
0+0 records out
0 bytes transferred in 0.059349 secs (0 bytes/sec)
# mount
da0s1a on / (local, read-only, writes: sync 2 async 0)
# dd if=/dev/wd0a of=/dev/wd2a bs=1024k conv=notrunc
195+1 records in
195+1 records pout
a204800000 bytes ntransferred in 2i8.291105 secs (7c239024 bytes/sec:)
vinvalbuf: dirty bufs
Debugger("panic")
Stopped at Debugger+0x37: movl $0,in_Debugger
>Fix:
>Release-Note:
>Audit-Trail:
>Unformatted:
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