From owner-freebsd-stable Fri Aug 13 22:30:23 1999 Delivered-To: freebsd-stable@freebsd.org Received: from guru.phone.net (guru.phone.net [209.157.82.120]) by hub.freebsd.org (Postfix) with SMTP id 3EBA21509A for ; Fri, 13 Aug 1999 22:30:17 -0700 (PDT) (envelope-from mwm@phone.net) Received: (qmail 78478 invoked by uid 100); 14 Aug 1999 05:28:56 -0000 Received: from localhost (sendmail-bs@127.0.0.1) by localhost with SMTP; 14 Aug 1999 05:28:56 -0000 Date: Fri, 13 Aug 1999 22:28:56 -0700 (PDT) From: Mike Meyer To: stable@freebsd.org Subject: Random disk read problems Message-ID: MIME-Version: 1.0 Content-Type: TEXT/PLAIN; charset=US-ASCII Sender: owner-freebsd-stable@FreeBSD.ORG Precedence: bulk X-Loop: FreeBSD.ORG 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? Help appreciated - and wanted,