Networker

Re: [Networker] AIT2 device cinfig in Solaris

2003-06-11 15:43:32
Subject: Re: [Networker] AIT2 device cinfig in Solaris
From: fred.korz AT SMARTS DOT COM
To: NETWORKER AT LISTMAIL.TEMPLE DOT EDU
Date: Wed, 11 Jun 2003 15:43:27 -0400
[Looks like I'm going to have to reply on-list]

Had similar 'Tape positioning by record is disabled.' for over a year and
couldn't get it fixed.  Turned out to be a WHITESPACE problem in st.conf.

Here's what works for us on an ultra II running 2.5.1 (legacy box about to
be replaced with a 280R running Sol 9 ... someday).  Because of the
sensitivity to the exact form of whitespace, and because your mail client
may gratuitiously change what I've sent, I include "od -a" output too.

# grep AIT /kernel/drv/st.conf
        "SONY    SDX-500C",     "SONY AIT-2 tape drive",        "AIT2_TAPE",
AIT2_TAPE       =       1,0x36,0,0xd639,4,0x00,0x00,0x00,0x00,0;

# grep AIT /kernel/drv/st.conf | /opt/gnu/bin/od -a
0000000  ht   "   S   O   N   Y  sp  sp  sp  sp   S   D   X   -   5   0
0000020   0   C   "   ,  ht   "   S   O   N   Y  sp   A   I   T   -   2
0000040  sp   t   a   p   e  sp   d   r   i   v   e   "   ,  ht   "   A
0000060   I   T   2   _   T   A   P   E   "   ,  nl   A   I   T   2   _
0000100   T   A   P   E  ht   =  ht   1   ,   0   x   3   6   ,   0   ,
0000120   0   x   d   6   3   9   ,   4   ,   0   x   0   0   ,   0   x
0000140   0   0   ,   0   x   0   0   ,   0   x   0   0   ,   0   ;  nl
0000160

Fred Korz        Manager, Development Support, System Management Arts
korz AT smarts DOT com                                          914 798 8546

On Mon, 9 Jun 2003, Oscar NOSPAM Olsson wrote:

>| I get some warnings from time to time, when it tries to do tape
>| positioning by record. It complains that the block size is 32k instead of
>| 64k. An example message below:
>|
>| Jun  9 16:39:56 britt root: NetWorker media: (notice) Volume "SL000010" on
>| device "/dev/rmt/8cbn": Cannot decode block. Verify the device
>| configuration. Tape positioning by record is disabled.
>|
>| I remember that I had some problems finding a good configuration for the
>| AIT2 drives for Solaris7 when we first installed the drives. It has been
>| an ongoing issue since then. However, since it doesn't seem to affect the
>| backup reliability, I haven't bothered looking into it before. But I am
>| curious about what could be causing this, and more important, how can it
>| be fixed? :)
>|
>| Below is an excerpt from st.conf on the backup server:
>|
>| tape-config-list=
>|         "SONY    SDX-500C","SONY AIT2 8mm","SONY_AIT";
>|
>|         SONY_AIT = 1,0x36,0,0xd679,4,0x00,0x00,0x00,0x00,0;
>|
>| name="st" class="scsi"
>|         target=0 lun=0;
>|
>| name="st" class="scsi"
>|         target=1 lun=0;
>|
>| name="st" class="scsi"
>|         target=2 lun=0;
>|
>| name="st" class="scsi"
>|         target=3 lun=0;
>|
>| name="st" class="scsi"
>|         target=4 lun=0;
>|
>| name="st" class="scsi"
>|         target=5 lun=0;
>|
>| name="st" class="scsi"
>|         target=6 lun=0;
>|
>| How is one supposed to REALLY know what the best definition is? I have
>| seen several suggestions for the same drives in several places. The
>| firmware on the drives themselves is fairly recent.
>|
>| One more RTFM question, the memory chip on the AIT2 tapes, how is it used
>| by networker, if at all? Does it need some kind of special configuration,
>| or is it used by default automatically?
>|
>| //Oscar

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