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Date:      Sat, 14 Aug 1999 20:39:10 +1000
From:      Greg Black <gjb-freebsd@gba.oz.au>
To:        Mike Meyer <mwm@phone.net>
Cc:        stable@FreeBSD.ORG
Subject:   Re: Random disk read problems 
Message-ID:  <19990814103911.21042.qmail@alice.gba.oz.au>
In-Reply-To: <Pine.BSF.4.10.9908132223010.94664-100000@guru.phone.net>  of Fri, 13 Aug 1999 22:28:56 MST
References:  <Pine.BSF.4.10.9908132223010.94664-100000@guru.phone.net> 

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Mike Meyer writes:

> I've been shuffling some data around in preperation for archiving
> it. Being a bit paranoid, I tend to md5 sum the stuff at both ends,
> and then verify the checksums.
> 
> I'm getting random differences. I.e. - the diff of the md5 sums will
> turn up a file or two that are different. Running diff or cmp on them
> by hand - and they're the same. Likewise, running md5 on them by hand
> turns up correct sums.
> 
> This worries me. I'm running an older version of 3.2-stable on a
> SuperMicro motherboard with 256Meg of ram and a Seagate ST39173W SCSI
> drive. Is this something that udpating the OS might fix, or am I
> seeing evidence of hardware problems (but I'm not seeing anything in
> syslog!), or possibly bugs in both diff and md5?

It's a near certainty that you have bad memory.

-- 
Greg Black -- <gjb@acm.org>



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