Thread View: comp.os.linux.hardware
11 messages
11 total messages
Started by Nick Andrew
Mon, 11 Dec 2000 11:24
Reading ancient tapes using Emulex MD21 SCSI board
Author: Nick Andrew
Date: Mon, 11 Dec 2000 11:24
Date: Mon, 11 Dec 2000 11:24
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I have a quantity of 60 mbyte 1/4" cartridges which I wish to read,
and copy the data onto a CDR for posterity. Unfortunately, my gear
doesn't quite work ...
1 x Linux box (2.2.17 kernel)
with 1 x AHA1542CF SCSI controller (ISA, very old one, 50-pin centronics)
with 1 x Centronics DB50 to old Sun type (50-pin, 3 rows) cable
1 x Sun 3 shoebox
containing 1 x Emulex MD21 SCSI-to-ESDI card
and 1 x 1/4" 60 mbyte cartridge drive. No other SCSI devices.
I remember the ESDI disk used to go in the bottom of the shoebox,
and the MD21 did the SCSI-to-ESDI mapping so the Sun3 box could
access it as a SCSI disk.
I don't remember whether the MD21 drove the tape also.
In configuring the AHA1542CF, I had to turn off Fast SCSI (quite
understandable considering the age of the gear it is driving). Also
the cable isn't terminated, not sure whether this is causing
further problems. Can't find my old Sun3 terminator.
When I boot Linux it recognises the controller and spends a long
time to identify 2 (yes!) SCSI disks, at id=1 and id=5. Both the
MD21. Now interestingly there aren't any disks there at all. It
can't see any tapes. When I use the AHA1542 BIOS diagnostics the
controller sees the MD21 on id=1 and it pauses on id=5, but does
not recognise a device on it.
Now on the kernel side I note that drivers/scsi/scsi.c has the
Emulex in its blacklist to prevent multi-LUN scanning. I seem
to recall the MD21 can actually map 2 ESDI disks; don't recall
whether they appear as 2 separate SCSI ids.
Theories:
- the tape drive is too old to obey the identification protocol
- the unterminated cable makes the comms dodgy
- my AHA1542CF is too old to recognise the tape drive
- the MD21 is not needed and is confusing the issue
I'm about to go and pull the tape unit apart to see whether I do
actually need the MD21. Does anybody have any other ideas? (apart
from borrowing a working internal SCSI drive).
Nick.
--
Pacific Internet SP4 Fax: +61-2-9247-4738 Voice: 03-9674-7543
http://www.zeta.org.au/~nick/
"Sorry to say this, but the job falls to the ultimate defenders
of liberty - you and me." [Keith Henson, 2000-06-29]
Re: Reading ancient tapes using Emulex MD21 SCSI board
Author: Dave Merrill
Date: Mon, 11 Dec 2000 12:29
Date: Mon, 11 Dec 2000 12:29
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Find a QIC-150 scsi drive. It will read 60Mb tapes, just not write them. They're a dime-a-dozen here in the States, probably pretty cheap down under too.
Re: Reading ancient tapes using Emulex MD21 SCSI board
Author: Nick Andrew
Date: Mon, 11 Dec 2000 14:04
Date: Mon, 11 Dec 2000 14:04
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nick@zeta.org.au (Nick Andrew) writes:
>Theories:
> - the MD21 is not needed and is confusing the issue
I found the tape drive is actually driven by its own controller
board (not the Emulex MD21, thankfully!). I unplugged the MD21
and Linux can now see the tape drive but read/write operations
do not work.
Also the tape drive identifies itself as "Sequential Access" but
the SCSI identification fields are all null. Maybe normal...!
Nick.
--
Pacific Internet SP4 Fax: +61-2-9247-4738 Voice: 03-9674-7543
http://www.zeta.org.au/~nick/
"Sorry to say this, but the job falls to the ultimate defenders
of liberty - you and me." [Keith Henson, 2000-06-29]
Re: Reading ancient tapes using Emulex MD21 SCSI board
Author: M. Buchenrieder
Date: Mon, 11 Dec 2000 17:16
Date: Mon, 11 Dec 2000 17:16
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nick@zeta.org.au (Nick Andrew) writes:
>nick@zeta.org.au (Nick Andrew) writes:
>>Theories:
>> - the MD21 is not needed and is confusing the issue
>I found the tape drive is actually driven by its own controller
>board (not the Emulex MD21, thankfully!). I unplugged the MD21
>and Linux can now see the tape drive but read/write operations
>do not work.
[...]
This is probably caused by the missing terminator. You'll need
at least passive termination on the drive to get that working.
I have to agree with the previous' poster: Get yourself a
borrowed QIC-150 SCSI tape drive instead, as it can easily
read 60 MB cartridges, although you'll have to experiment
with the blocksize that the Sun had used when writing to the
tape.
Michael
--
Michael Buchenrieder * mibu@scrum.greenie.muc.de * http://www.muc.de/~mibu
Lumber Cartel Unit #456 (TINLC) & Official Netscum
Note: If you want me to send you email, don't munge your address.
Re: Reading ancient tapes using Emulex MD21 SCSI board
Author: B'ichela
Date: Mon, 11 Dec 2000 22:52
Date: Mon, 11 Dec 2000 22:52
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On Mon, 11 Dec 2000 06:29:49 -0600, Dave Merrill <r390a@enteract.com> wrote: >Find a QIC-150 scsi drive. It will read 60Mb tapes, just not write >them. They're a dime-a-dozen here in the States, probably pretty >cheap down under too. > > having a Wangtek 5150es (its the scsi version). I have made DC600A tapes on it without a hitch! Forget those DC300XLs! Those wont write (never tried a read). if the tapes are DC600s you should not have a problem. PROVINDING that the restore software is the same type as on the SUN. If the sun used dump. use dump to read em back. if tar use tar. if it was cpio, try the gnu cpio. -- B'ichela
Re: Reading ancient tapes using Emulex MD21 SCSI board
Author: chris ulrich
Date: Tue, 12 Dec 2000 09:16
Date: Tue, 12 Dec 2000 09:16
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In article <slrn93amkg.daq.mdalene@pinkrose.ctol.net>, B'ichela <mdalene@home.ctol.net> wrote: %%gOn Mon, 11 Dec 2000 06:29:49 -0600, Dave Merrill <r390a@enteract.com> wrote: %%g having a Wangtek 5150es (its the scsi version). I have made %%gDC600A tapes on it without a hitch! Forget those DC300XLs! Those wont %%gwrite (never tried a read). if the tapes are DC600s you should not %%ghave a problem. PROVINDING that the restore software is the same type %%gas on the SUN. If the sun used dump. use dump to read em back. if tar %%guse tar. if it was cpio, try the gnu cpio. %%g B'ichela If you use the lower density DC600A tapes and write with a QIC150 tape drive, the resulting tapes will be 125mb and will not be readable in a 60mb tape drive. You will be able to read them with a QIC150 tape drive, though. chris
Re: Reading ancient tapes using Emulex MD21 SCSI board
Author: Nick Andrew
Date: Tue, 12 Dec 2000 13:09
Date: Tue, 12 Dec 2000 13:09
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mibu@scrum.muc.de (M. Buchenrieder) writes:
>This is probably caused by the missing terminator. You'll need
>at least passive termination on the drive to get that working.
>I have to agree with the previous' poster: Get yourself a
>borrowed QIC-150 SCSI tape drive instead, as it can easily
>read 60 MB cartridges, although you'll have to experiment
>with the blocksize that the Sun had used when writing to the
>tape.
A kind soul is going to post me a QIC-150 SCSI drive tomorrow ... :-)
Nick.
--
Pacific Internet SP4 Fax: +61-2-9247-4738 Voice: 03-9674-7543
http://www.zeta.org.au/~nick/
"Sorry to say this, but the job falls to the ultimate defenders
of liberty - you and me." [Keith Henson, 2000-06-29]
Re: Reading ancient tapes using Emulex MD21 SCSI board
Author: Nick Andrew
Date: Tue, 12 Dec 2000 13:15
Date: Tue, 12 Dec 2000 13:15
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mdalene@pinkrose.local.net (B'ichela) writes:
> having a Wangtek 5150es (its the scsi version). I have made
>DC600A tapes on it without a hitch! Forget those DC300XLs! Those wont
>write (never tried a read). if the tapes are DC600s you should not
>have a problem. PROVINDING that the restore software is the same type
>as on the SUN. If the sun used dump. use dump to read em back. if tar
>use tar. if it was cpio, try the gnu cpio.
The interesting things will be tars. Sometimes many to a tape. There
will be some dumps as well, perhaps Linux dump can read the format
written by SunOS 4.x
Whatever files I can get out of it, I will uncompress, compare
(disregarding duplicate versions), rearrange a bit then write
onto a few CDRs. When the CDRs become an obsolete storage medium
I'll copy them onto something else :-)
Nick.
--
Pacific Internet SP4 Fax: +61-2-9247-4738 Voice: 03-9674-7543
http://www.zeta.org.au/~nick/
"Sorry to say this, but the job falls to the ultimate defenders
of liberty - you and me." [Keith Henson, 2000-06-29]
Re: Reading ancient tapes using Emulex MD21 SCSI board
Author: Hauke Fath
Date: Tue, 12 Dec 2000 14:22
Date: Tue, 12 Dec 2000 14:22
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[f'up to comp.sys.sun.hardware]
Nick Andrew <nick@zeta.org.au> wrote:
> The interesting things will be tars. Sometimes many to a tape. There
> will be some dumps as well, perhaps Linux dump can read the format
> written by SunOS 4.x
With tar, you'll have an endian issue reading sun3-written tapes on
Lunix (i386, I assume). At least that's what I saw reading tar tapes
from an NCR tpwer (68020) on NetBSD/i386.
hauke
Re: Reading ancient tapes using Emulex MD21 SCSI board
Author: jason andrade
Date: Tue, 12 Dec 2000 22:18
Date: Tue, 12 Dec 2000 22:18
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nick@zeta.org.au (Nick Andrew) writes: >mibu@scrum.muc.de (M. Buchenrieder) writes: >>This is probably caused by the missing terminator. You'll need >>at least passive termination on the drive to get that working. >>I have to agree with the previous' poster: Get yourself a >>borrowed QIC-150 SCSI tape drive instead, as it can easily >>read 60 MB cartridges, although you'll have to experiment >>with the blocksize that the Sun had used when writing to the >>tape. >A kind soul is going to post me a QIC-150 SCSI drive tomorrow ... :-) hmm. i think i have sunos 4.1.1_u1 for sun3 and sun3x on qic60.. when you're done with the drive, maybe i can borrow it so i can rescue the data and write it out to cdrom too :-) regards, -jason
Re: Reading ancient tapes using Emulex MD21 SCSI board
Author: Peter Koch
Date: Thu, 14 Dec 2000 10:19
Date: Thu, 14 Dec 2000 10:19
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Hi! jason@azure.dstc.edu.au (jason andrade) wrote: > hmm. i think i have sunos 4.1.1_u1 for sun3 and sun3x on qic60.. > when you're done with the drive, maybe i can borrow it so i can > rescue the data and write it out to cdrom too :-) You can always download SunOS 4.1.1 for sun3 or sun3x from the Sun3/3x-Archive: http://sun3arc.krupp.net The stuff will be available as long as the trusty ol' Sun3/260 runs... and maybe much much longer... Tschuess Peter Sent via Deja.com http://www.deja.com/
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