[5485] in linux-scsi channel archive
Re: Exabyte 8[25]00 8mm Tape drives & 53c810a , Troubles ?
daemon@ATHENA.MIT.EDU (Mr. James W. Laferriere)
Thu Dec 24 23:47:23 1998
Date: Thu, 24 Dec 1998 20:43:11 -0800 (PST)
From: "Mr. James W. Laferriere" <babydr@nwrain.net>
Reply-To: "Mr. James W. Laferriere" <babydr@nwrain.net>
To: Richard Waltham <dormouse@farsrobt.demon.co.uk>
cc: groudier@club-internet.fr, linux-scsi@vger.rutgers.edu
In-Reply-To: <199812230039.AAA21968@farsrobt.demon.co.uk>
Hello Richard, Thank you for the response . More below.
On Wed, 23 Dec 1998, Richard Waltham wrote:
> Mr. James W. Laferriere wrote:
> > Hello Gerard , Please find below a dmesg from a very bad tar
> > attempt to the tape drive mentioned . Also I tried the 8500
> > everything else same except used 8500 instead . IE:
> >
> > Vendor: EXABYTE Model: EXB-850085QANXRC Rev: 06X0
> > Type: Sequential-Access ANSI SCSI revision: 02
> >
> > Command used :
> >
> > tar --same-owner -cpf /dev/st0 /etc/passwd /[0-9A-Za-oq-z]*
> >
> > a few minutes after the 'command processing resumed'
> > the timeouts resumed & didn't stop , truth be told couldn't
> > be stopped with out 'reset switch' . :-{
>
> As the tape drive is on a different controller to the disks and it is the
> disks timing out I would suspect a problem with the controller/scsi bus the
> disks are on, not the tape unit.
OK quite poss. this is a strange setup here . But is supposed
to be ok as is . See below .
Though I have tried this command as a test to verify that I can
read the two filesystems at load . No errors were reported
during the below or any troubles with the scsi-chain . :-}
tar --same-owner -cpf /dev/null /etc/passwd /[0-9A-Za-oq-z]*
> I use an almost identical exb-8500, slightly different firmware level, with
> no problems. My disk is on its own controller SYM8951U and tape and CD on a
> second controller SYM8751SP - similar, but not identical, set up to yours.
Mine is a FirePort-40(875J) & Asus-SC200(810a)
io 0x6200 io 0x6100 sharing irq9
> A typical set up that is almost certain to generate timeouts is to have disk
> and tape on the same bus with the tape set up to _not_ disconnect. However
> with the tape on a different controller to the disks it is possible to set
> the tape to disconnect or not disconnect and there should be no timeouts.
>
> I would check out the disk scsi bus just in case you disturbed something
> when adding the tape unit.
The 810 has been the original ctrlr in this system since it was
built , I added the 875j a few months back & at that time had
a bit of trouble with -sssllllllooooooooowwwwwwwwwww- boots .
Until someone pointed out the lilo 'compact' option which speeded
boot times up to normal .
> Bye for now
> Richard
...snip...
> --
> Richard Waltham | Work: richard@digitalinterface.demon.co.uk
> At home in | Home: dormouse@farsrobt.demon.co.uk
> Southampton UK | 100421.1276@compuserve.com
Tia, JimL
+-----------------------------------------------------------------------+
| James W. Laferriere - Network Engineer - babydr@baby-dragons.com |
| System Techniques - 25416 - 22nd S. - Des-Moines, WA 98198 |
| Give me VMS -or- Give me Linux -but- only on AXP |
+-----------------------------------------------------------------------+
-------------------------------+ PC , Personal Computer ;-)
PC +---+ | HD , Scsi Hard Disk
+----+ |HD | | CD , Scsi CDrom
| HD | | T | | TD , Scsi Tape Drive
| T | +-+-+ +-----------+ N , Narrow Connections
+-++-+ +-----| N | n/c W , Wide Connections
++===============| W 53c875J | T , Terminations
+----+ +-----------+
| CD | |
| T | +-----------+
+-++-+ | N only | +-------+
+----------------| 53c810A |------++T TD |
+-----------+ +-------+
|
-------------------------------+
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