From mboxrd@z Thu Jan  1 00:00:00 1970
Message-ID: <732f0af01df4a24f0cea8a11046f4817@tombob.com>
To: 9fans@cse.psu.edu
Date: Wed, 28 Nov 2007 22:42:27 +0000
From: Robert Raschke <rrplan9@tombob.com>
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Subject: [9fans] venti wrarena i/o errors
Topicbox-Message-UUID: 0e0ddfec-ead3-11e9-9d60-3106f5b1d025

Hi,

I am trying to migrate my old venti/fossil from one machine to another
(the new machine is running the new venti).  I am doing this pretty
piecemeal and by hand to find my bearings.  When I'm running
venti/wrarena on the old machine pointing at the new one, I am getting
i/o errors on the new machine.  I'm wondering if these point to disk
problems, or if they are benign?

On "new" I created the partitions and did venti/fmtarenas,
venti/fmtisect, venti/fmtindex and finally venti/venti with the
following venti.conf:
index main
isect /dev/sdC0/isect
arenas /dev/sdC0/arenas
mem 5M
bcmem 10M
icmem 15M

On "old", I saved the first arena into a file using venti/rdarena.
And then I'm running
venti/wrarena -h new arenas0
on "old" and the copying starts.

But on "new" I get these errors like these during the copy:
2007/1128 22:10:54 err 4: write /dev/sdC0/arenas offset 0x312a000 count 8192 buf 3458000 returned -1: i/o error
venti/venti: writeproc: part /dev/sdC0/arenas addr 0x312a000: write error: write /dev/sdC0/arenas offset 0x312a000 count 8192 buf 3458000 returned -1: i/o error
2007/1128 22:10:55 err 4: read /dev/sdC0/isect offset 0x7767e000 count 8192 buf 3836000 returned -1: i/o error
2007/1128 22:18:50 err 4: write /dev/sdC0/arenas offset 0x6c86000 count 8192 buf 3c0c000 returned -1: i/o error
venti/venti: writeproc: part /dev/sdC0/arenas addr 0x6c86000: write error: write /dev/sdC0/arenas offset 0x6c86000 count 8192 buf 3c0c000 returned -1: i/o error
2007/1128 22:18:50 err 4: read /dev/sdC0/isect offset 0x5d686000 count 8192 buf 348c000 returned -1: i/o error
2007/1128 22:18:50 err 4: write /dev/sdC0/arenas offset 0x6c88000 count 8192 buf 353e000 returned -1: i/o error
venti/venti: writeproc: part /dev/sdC0/arenas addr 0x6c88000: write error: write /dev/sdC0/arenas offset 0x6c88000 count 8192 buf 353e000 returned -1: i/o error
2007/1128 22:22:50 err 4: write /dev/sdC0/arenas offset 0x9e9e000 count 8192 buf 33ac000 returned -1: i/o error
venti/venti: writeproc: part /dev/sdC0/arenas addr 0x9e9e000: write error: write /dev/sdC0/arenas offset 0x9e9e000 count 8192 buf 33ac000 returned -1: i/o error
2007/1128 22:22:51 err 4: read /dev/sdC0/isect offset 0x139dc000 count 8192 buf 39b0000 returned -1: i/o error
2007/1128 22:22:51 err 4: write /dev/sdC0/arenas offset 0x9ea0000 count 8192 buf 3c00000 returned -1: i/o error
2007/1128 22:22:51 err 4: read /dev/sdC0/isect offset 0x36c6c000 count 8192 buf 3b1c000 returned -1: i/o error
venti/venti: writeproc: part /dev/sdC0/arenas addr 0x9ea0000: write error: write /dev/sdC0/arenas offset 0x9ea0000 count 8192 buf 3c00000 returned -1: i/o error
2007/1128 22:34:58 err 4: write /dev/sdC0/arenas offset 0x19a06000 count 8192 buf 3312000 returned -1: i/o error
venti/venti: writeproc: part /dev/sdC0/arenas addr 0x19a06000: write error: write /dev/sdC0/arenas offset 0x19a06000 count 8192 buf 3312000 returned -1: i/o error
2007/1128 22:34:58 err 4: read /dev/sdC0/isect offset 0x85130000 count 8192 buf 3626000 returned -1: i/o error
2007/1128 22:34:58 err 4: write /dev/sdC0/arenas offset 0x19a08000 count 8192 buf 349e000 returned -1: i/o error
venti/venti: writeproc: part /dev/sdC0/arenas addr 0x19a08000: write error: write /dev/sdC0/arenas offset 0x19a08000 count 8192 buf 349e000 returned -1: i/o error


So, I am wondering if I've got a duff disk, or if there is something
else that I can investigate.  Any pointers are gratefully received.

Robby

--
r.raschke can be found at tombob.com .