Hi Carl

Thanks for posting this information!

Regarding your "Failed to read 65536 byte block with 32768 byte read."
issue, this sounds like a problem that's reported fairly often on this list.
It sounds like NetWorker's default block size for your tape device can't
work in your environment, perhaps because a driver is not allowing a 64KB
read?

Hope this helps.
tl

-----Original Message-----
From: Legato NetWorker discussion [mailto:NETWORKER AT LISTSERV.TEMPLE DOT EDU] 
On
Behalf Of Carl Bergmann
Sent: Thursday, February 17, 2005 1:58 AM
To: NETWORKER AT LISTSERV.TEMPLE DOT EDU
Subject: Re: [Networker] Very Frustrating Problem

Hello Ken
I'v struggeled with that problem for months. I have a case with Dell's
Goldsupport and RedHat. I'm running Networker 7.1.3 on a Dell Power Edge
2800 with a Dell PV136T library with 6 LTO-2 tapedrives. OS is RHEL ES 3
v. u3. SCSI-adapters are Adaptec 2860D. I'v found out that the problem
is the aic7xxx driver that come's with redhat. It's a very old version
(6.2.36). I'v mannaged to instal a newer driver (6.3.9) from adaptec and
the only messages(error) I now get in /var/log/messages is a warning:
kernel: st4: Failed to read 65536 byte block with 32768 byte read.
All my backup run's ok, and I'm able to restore from all my tapes. 
Yesterday I installed RHEL ES v 4 (just released) and hoped that the
aic7xxx driver had been replaced. But no, it's still version 6.2.36. I'm
looking forward to get a new rpm/driver from RedHat/Dell that solve the
problem.
Nb. If you look at the version  history from adaptec on the driver
aic7xxx there has been a lot of improvements from 6.2.36 to 6.3.9 so I
simply donn't understand why RedHat is still using the old version.
Regards
Carl Bergmann
Risoe Nat. Lab.
DK

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