From: Richard Miller <miller@hamnavoe.demon.co.uk>
To: 9fans@cse.psu.edu
Subject: Re: [9fans] venti ports and productization
Date: Wed, 22 Oct 2003 15:57:15 +0100 [thread overview]
Message-ID: <11aaa855361fd5ac7e637be3d37d3116@hamnavoe.com> (raw)
In-Reply-To: <E1ABymF-0000VR-7q@t40.swtch.com>
> We have had some problems
> with the big Venti server, but my understanding is that
> all of the problems appeared to be disk corruption rather
> than software error.
The software could do a bit better in recovering from hardware errors.
If a bad sector makes a venti block unreadable, rdarena and wrarena
could use the redundant information in the arena trailer to skip the
bad block and continue, but they just give up. Worse, if checkarenas
(with -f) fails to read a block, instead of using the trailer information
to skip the block, it tries to correct the mismatch between block label
and trailer by copying garbage into the trailer entry from the buffer
it just failed to read into. Oops.
-- Richard
next prev parent reply other threads:[~2003-10-22 14:57 UTC|newest]
Thread overview: 22+ messages / expand[flat|nested] mbox.gz Atom feed top
2003-10-11 0:37 a
2003-10-11 1:45 ` jmk
2003-10-11 1:50 ` bs
2003-10-11 2:14 ` Russ Cox
2003-10-11 17:05 ` a
2003-10-21 10:14 ` Martin C.Atkins
2003-10-21 10:20 ` a
2003-10-21 14:26 ` jmk
2003-10-21 15:35 ` a
2003-10-21 15:50 ` Russ Cox
2003-10-21 18:24 ` rog
2003-10-22 4:33 ` okamoto
2003-10-22 5:15 ` okamoto
2003-10-22 9:48 ` a
2003-10-22 14:57 ` Richard Miller [this message]
2003-10-22 16:54 ` jmk
2003-10-21 17:20 ` Scott Schwartz
2003-10-21 21:30 ` C H Forsyth
2003-10-21 22:13 ` Dan Cross
2003-10-21 16:05 ` Rob Pike
2003-10-21 16:50 ` rog
2003-10-22 9:52 ` Martin C.Atkins
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