Re: Erroneous data with ext2fs

Harald Koenig (
Mon, 10 Mar 1997 10:19:47 +0100 (MET)

> So there DOES seem to be something wrong with the e2fs presently.
> Now, I wondered if it was the SCSI driver, rather than the file-system
> Therefore, I proceeded as follows:
> # umount /mnt
> # cp /dev/zero /dev/sdc1 # Copy to the raw partition.
> The results were * S P E C T A C U L A R * (don't try this at home)!

one more data point, maybe completely unrelated, but maybe pointing to
some severe buffer cache problems ?! ::

last week I created a 130MB MSDOS partition (reusing the swap partition
for a moment;) on a 4GB SCSI disk at NCR 53C810 in a PPro200/128MB box
with plain 2.0.29 because I needed real M$-Win31 for an hour...

after the dos job was finished I booted Linux again, mounted the msdos fs
in Linux and tried to fill up this file system with one big file using

cat /dev/zero > /msdos/bigfile

when the file system run full, the machine completely crashed (no kernel mgs,
no screen flashing; just completely halted).

trying to reboot showed a *completely* hosed 1GB root file system !!!
I tried to repair the thing for some time using e2fsck (needed several runs
because lost+found couldn't be expanded anymore and then e2fsck crashed;
so I had to move some suff out off lost+found and start over again 2 more times)
finally I re-installed the whole machine :-((

I'll try this again tomorrow after having made a full backup.
any ideas what should be tested or what may be the reason ?


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