[9fans] dossrv: I/O error: dev 3 sector ..., read: 0, should be 4608

[Axel Belinfante <Axel.Belinfante@cs.utwente.nl>]

During and after installation of the june 12 version I get
the error mentioned in the subject for some files from a
WIN95 FAT32 partition, while trying to read them using dossrv.
During installation of plan9, this problem caused making the
backup copy of msdos.sys to fail.
After installation, when I have done 'c:' and then do 'du -a /n/c:' 
I get a list of error messages.
The 4608 seems to be the Trksize (= Sectorsize*Sect2trk from
dossrv/iotrack.h). I found this in the source at
<http://offworld.fac.cs.cmu.edu/plan9/source//src/cmd/dossrv/devio.c#L23>

The problem seems to be reproducable, i.e. repeatedly trying to get
the wordcount of a file that showed the problem once keeps returning
the error. Also, it reproduces for the same files over a (warm) reboot.
It shows up, among other things, for some directories
that (according to Linux 'ls') have a size of 4096.
I can read those files/directories without problem using Linux.

Is this a known problem? If not, is there any information that I could
provide to help track down the problem?

Thanks,
Axel.
-- 
 <Axel.Belinfante@cs.utwente.nl>   <URL:http://www.cs.utwente.nl/~belinfan/>
 University of Twente, Dept. of Computer Science, Formal Methods & Tools Group
 P.O. Box 217; NL-7500 AE Enschede.  Phone: +31 53 4893774; Fax: +31 53 4893247
     "ili ne sciis ke estas neebla do ili simple faris" -- Loesje