From: "Russ Cox" <rsc@plan9.bell-labs.com>
To: 9fans@cse.psu.edu, Axel.Belinfante@cs.utwente.nl
Subject: Re: [9fans] dossrv: I/O error: dev 3 sector ..., read: 0, should be 4608
Date: Mon, 17 Jul 2000 17:03:35 -0400 [thread overview]
Message-ID: <200007172103.RAA17759@smtp4.fas.harvard.edu> (raw)
The first thing to do is see if the sector
numbers make any sense. First,
multiply them by 512 and see if they're
still 31-bit numbers. If not, you need
to change devio.c thusly:
g% diff /n/dump/2000/0601/sys/src/cmd/dossrv/devio.c devio.c
38c38
< seek(xf->dev, xf->offset+addr*Sectorsize, 0);
---
> seek(xf->dev, xf->offset+(vlong)addr*Sectorsize, 0);
57c57
< seek(xf->dev, xf->offset+addr*Sectorsize, 0);
---
> seek(xf->dev, xf->offset+(vlong)addr*Sectorsize, 0);
g%
If that's not the problem, make sure you
actually can read from those sectors:
dd -if /dev/sdC0/dos -bs 512 -count 9 -iseek sectornumber >/dev/null
Russ
next reply other threads:[~2000-07-17 21:03 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2000-07-17 21:03 Russ Cox [this message]
2000-07-18 15:18 ` Axel Belinfante
-- strict thread matches above, loose matches on Subject: below --
2000-07-17 17:26 Axel Belinfante
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