Re: Massive e2fs corruption with 2.2.9/10?

Philip Gladstone (philip@raptor.com)
Thu, 17 Jun 1999 10:53:06 -0400

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ron flory wrote:
>
> > We are getting strange disk corruptions on 2.2.9 -- well actually I
> > think that they are buffer cache corruptions. The odd bit gets
> > flipped in files....
>
> This agress with problems I've been chasing for a few days now...
>
> If I copy a large (650Mb) file to a different filename, then perform a
> compare on them, I encounter random, different miscompares. I've seen
> this on several 2.2.9 and 2.2.10 systems.

Ahah -- when I try this with a 120MB file, I get non-random miscompares!

530> cp bigone bigtwo; cmp bigone bigtwo
bigone bigtwo differ: char 1365812, line 13789
531> cp bigone bigtwo; cmp bigone bigtwo
bigone bigtwo differ: char 24542708, line 277660
531> cp bigone bigtwo; cmp bigone bigtwo
bigone bigtwo differ: char 1365812, line 13789
531> cp bigone bigtwo; cmp bigone bigtwo
bigone bigtwo differ: char 2195188, line 18770
531> cp bigone bigtwo; cmp bigone bigtwo
bigone bigtwo differ: char 1365812, line 13789
531> cp bigone bigtwo; cmp bigone bigtwo
bigone bigtwo differ: char 1365812, line 13789
531> cp bigone bigtwo; cmp bigone bigtwo
bigone bigtwo differ: char 2756020, line 22704
531> cp bigone bigtwo; cmp bigone bigtwo
bigone bigtwo differ: char 24542708, line 277660
531> cp bigone bigtwo; cmp bigone bigtwo
bigone bigtwo differ: char 13589420, line 77196
531> cp bigone bigtwo; cmp bigone bigtwo
bigone bigtwo differ: char 4263028, line 34554
531> cp bigone bigtwo; cmp bigone bigtwo
531> cp bigone bigtwo; cmp bigone bigtwo
bigone bigtwo differ: char 2195188, line 18770

Out of 12 tests,

it compared OK once.
It broke at byte 1365812 four times
24542708 twice
2195188 twice
three different place once each

This does seem to point the finger at a software problem. Anyway,
we'll try 2.0.36 and see what happens.

Philip

-- 
Philip Gladstone                           +1 781 530 2461
Axent Technologies, Waltham, MA
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