Networker

[Networker] INCORRECT BLOCK SIZE / DRIVE FAIL?

2004-10-04 10:00:31
Subject: [Networker] INCORRECT BLOCK SIZE / DRIVE FAIL?
From: Matt Temple <mht AT RESEARCH.DFCI.HARVARD DOT EDU>
To: NETWORKER AT LISTMAIL.TEMPLE DOT EDU
Date: Mon, 4 Oct 2004 10:02:07 -0400
I had an event like this about half a year ago, but this one is new.
Does anyone want to venture an opinion about whether this is a hardware
(i.e. library) or software (networker) problem?


Environment:

        First, note that the setup I have has been working flawlessly
for 6 months.

        Linux tapes.dfci.harvard.edu 2.4.20-31.9 #1
                Tue Apr 13 18:04:23 EDT 2004 i686 i686 i386 GNU/Linux
        Redhat 9.
        Networker server 7.1.1.
                nst0 -- AIT-3
                nst1 -- AIT-3
                nst2 -- AIT-2

        Event -- computer hung.   On reboot, there was a bad block in one
of the resource files, and Networker thought there was no
jukebox defined.   I redefined jukebox.
==================================================================
In my startup file, I run stinit:

# This file contains example definitions for different kinds of tape
# devices. If the user agrees with the definitions, they can be used
# in the definition file stinit.def by changing the manufacturer and
# model fields to correspond the real tape device being defined.

# The common definitions that can usually be used
# {buffer-writes read-ahead async-writes }
{buffer-writes read-ahead async-writes scsi2logical=1}
# SONY AIT-3
manufacturer="SONY" model = "SDX-700C" {
can-bsr scsi2logical drive-buffering
timeout=800
long-timeout=14400
mode1 blocksize=0 density=0x00 }
# SONY AIT-2
manufacturer="SONY" model = "SDX-500C" {
can-bsr scsi2logical drive-buffering
timeout=800
long-timeout=14400
mode1 blocksize=0 density=0x00 }

==================================================================
and in my networker startup file I have the following definitions:

NSR_DEV_BLOCK_SIZE_8MM_AIT_3=192
export NSR_DEV_BLOCK_SIZE_8MM_AIT_3
NSR_DEV_BLOCK_SIZE_8MM_AIT_2=64
export NSR_DEV_BLOCK_SIZE_8MM_AIT_2

=====================================================================
I also define the device block size in the same  way in the devices
setup within nwadmin.

=====================================================================
since the reboot, when I try to mount a tape in /dev/nst0, the following
happens:

Oct  4 09:22:09 tapes logger: NetWorker media: (notice) setting (8mm
AIT-3) block size to (192 KB)
Oct  4 09:22:51 tapes kernel: st0: Block limits 2 - 16777215 bytes.
Oct  4 09:23:03 tapes kernel: st0: Incorrect block size.
Oct  4 09:23:25 tapes kernel: st0: Incorrect block size.
Oct  4 09:23:31 tapes logger: NetWorker media: (warning) /dev/nst0
reading: Success
Oct  4 09:23:45 tapes kernel: st0: Incorrect block size.
Oct  4 09:23:51 tapes logger: NetWorker media: (warning) /dev/nst0
reading: no tape label found

... and the tape is ejected.


If I do the same wih /dev/nst1, which is set the same, the mount is
successful.

I am assuming that something happened to the physical device, /dev/nst0,
which I've now disabled.  But because of this previous event, I need to
make sure there is no way this could be a software/settings failure.

What's the next step.

                                        mht

--
=============================================================
Matthew Temple                Tel:    617/632-2597
Director, Research Computing  Fax:    617/582-7820
Dana-Farber Cancer Institute  mht AT research.dfci.harvard DOT edu
44 Binney Street, LG300/300   http://research.dfci.harvard.edu
Boston, MA 02115              Choice is the Choice!

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