From owner-freebsd-geom@FreeBSD.ORG  Sat Apr 29 00:34:05 2006
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Date: Fri, 28 Apr 2006 20:34:03 -0400
From: "Rong-En Fan" <grafan@gmail.com>
To: geom@freebsd.org, "Pawel Jakub Dawidek" <pjd@freebsd.org>
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Cc: 
Subject: v_vfs_done error = 1 on gconcat device
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Hi Pawel,

I'm running RELENG_6 around Apr 6. Sometimes, I saw lots of

g_vfs_done():concat/tmp[WRITE(offset=3D25658605568, length=3D114688)]error =
=3D 1
g_vfs_done():concat/tmp[WRITE(offset=3D25658605568, length=3D114688)]error =
=3D 1
g_vfs_done():concat/tmp[WRITE(offset=3D25658605568, length=3D114688)]error =
=3D 1
g_vfs_done():concat/tmp[WRITE(offset=3D25658605568, length=3D114688)]error =
=3D 1
g_vfs_done():concat/tmp[WRITE(offset=3D25658605568, length=3D114688)]error =
=3D 1

in my console. The concat/tmp is consist of two disk:

Geom name: tmp
State: UP
Status: Total=3D2, Online=3D2
Type: AUTOMATIC
ID: 2047271624
Providers:
1. Name: concat/tmp
   Mediasize: 62055485440 (58G)
   Sectorsize: 512
   Mode: r1w1e1
Consumers:
1. Name: da0s1d
   Mediasize: 25658654720 (24G)
   Sectorsize: 512
   Mode: r1w1e2
   Start: 0
   End: 25658654208
2. Name: da1s1e
   Mediasize: 36396831744 (34G)
   Sectorsize: 512
   Mode: r1w1e2
   Start: 25658654208
   End: 62055485440

If the offset in the console is in the same unit as "Mediasize" in gconcat =
list,
then, it looks like it tries to write something that crossing two
physical disks.
IIRC, everytime I see those messages, the offset is really close to the
end of the first disk.

Any ideas?

Thanks,
Rong-En fan