2000-11-02 14:50:31

by Mike Dresser

[permalink] [raw]
Subject: issues with ide-tape under 2.4.x and with 2.2.x+ide patches

(originally posted to [email protected], but i figure more people read
this list <grin>)

Hi

Hoping someone can help. I'm running Debian 2.2, tar (GNU tar)
1.13.17. Hardware is a celeron 300, Abit BH6, but repeats itself on all
hardware i've tested(old dataexpert 8551/8661's, abit be6, some via686a
box at home, gigabyte mb's, you name it)

I'm currently running 2.4.0test10, running backups onto an IDE HP 7/14
gb drive. Using tar -cpvf /dev/ht0 myfiles backs up fine, no errors.

But..

promise:~# tar -tf /dev/ht0
tar: /dev/ht0: Cannot read: Input/output error
tar: At beginning of tape, quitting now
tar: Error is not recoverable: exiting now

and from dmesg:
ide-tape: ht0: I/O error, pc = 1e, key = 5, asc = 20, ascq = 0
ide-tape: ht0: I/O error, pc = 8, key = 5, asc = 2c, ascq = 0
ide-tape: ht0: I/O error, pc = 1e, key = 5, asc = 20, ascq = 0

(normal, i get those cause of the lock drive/unlock drive, which the
drive doesn't support)

If i bounce back to 2.2.17(18-18 as well), and do the exact same
command, I can read my tapes again. But I lose support for the Promise
Ultra/66 in the machine. So. I go back to 2.2.17, put in the ide
patches. I can't read my tapes again. Take out the patches. Tapes
restore fine. So I'm wondering what changed with Andre's patches, and
also with 2.4.x?

I also ran into the same issues, back when i was playing with 2.2.17,
using taper 6.9b, leading me to suspect it's not tar's fault. Just
tried dump, aside from it not agreeing with my /dev/md0 device, it backs
up fine, can't restore.

I get the same results with a Seagate IDE 10/20 drive.

ide-tape is compiled as a module, but IIRC it does the same behaviour as
built in.

Yes, the proper solution is buy a DDS-3 drive and a handful of tapes.
But my cheap employer doesn't want to spend the money to do it right.

Hoping for a solution,
Mike Dresser


2000-11-03 02:48:16

by Jens Axboe

[permalink] [raw]
Subject: Re: issues with ide-tape under 2.4.x and with 2.2.x+ide patches

On Thu, Nov 02 2000, Mike Dresser wrote:
> I'm currently running 2.4.0test10, running backups onto an IDE HP 7/14
> gb drive. Using tar -cpvf /dev/ht0 myfiles backs up fine, no errors.
>
> But..
>
> promise:~# tar -tf /dev/ht0
> tar: /dev/ht0: Cannot read: Input/output error
> tar: At beginning of tape, quitting now
> tar: Error is not recoverable: exiting now
>
> and from dmesg:
> ide-tape: ht0: I/O error, pc = 1e, key = 5, asc = 20, ascq = 0
> ide-tape: ht0: I/O error, pc = 8, key = 5, asc = 2c, ascq = 0
> ide-tape: ht0: I/O error, pc = 1e, key = 5, asc = 20, ascq = 0
>
> (normal, i get those cause of the lock drive/unlock drive, which the
> drive doesn't support)

Interesting, and this is test10? I submitted a patch for test10 to
not attempt prevent-removal commands in the ide-tape drives that
do not support it. If this is indeed test10, that would mean that
the HP drive misreports that capability. It'd be nice to know.

--
* Jens Axboe <[email protected]>
* SuSE Labs

2000-11-03 14:39:15

by Mike Dresser

[permalink] [raw]
Subject: Re: issues with ide-tape under 2.4.x and with 2.2.x+ide patches

(forgot to CC: this to the list when i replied to Jens, and decided to add
another paragraph)

I just tried my Seagate drive, and i can read my tapes in it. If i swap
over to the HP, i can't read the tapes. I'll look today, whether the
Seagate replies with a bunch of those I/O Errors. It's not like i'm doing
anything but working on making this damn tape drive work =)

Considering the HP 7/14 gig format is already a proprietory format(<sarcasm>
THANKS HP! </sarcasm>), it wouldn't surprise me if something else is non
standard. It's weird that i can read 7/14 gig tapes in the 10/20 Seagate
though. Nice of Seagate to include support for someone else's mistake =)

Jens Axboe wrote:

> On Thu, Nov 02 2000, Mike Dresser wrote:
> > I'm currently running 2.4.0test10, running backups onto an IDE HP 7/14
> > gb drive. Using tar -cpvf /dev/ht0 myfiles backs up fine, no errors.
> >
> > But..
> >
> > promise:~# tar -tf /dev/ht0
> > tar: /dev/ht0: Cannot read: Input/output error
> > tar: At beginning of tape, quitting now
> > tar: Error is not recoverable: exiting now
> >
> > and from dmesg:
> > ide-tape: ht0: I/O error, pc = 1e, key = 5, asc = 20, ascq = 0
> > ide-tape: ht0: I/O error, pc = 8, key = 5, asc = 2c, ascq = 0
> > ide-tape: ht0: I/O error, pc = 1e, key = 5, asc = 20, ascq = 0
> >
> > (normal, i get those cause of the lock drive/unlock drive, which the
> > drive doesn't support)
>
> Interesting, and this is test10? I submitted a patch for test10 to
> not attempt prevent-removal commands in the ide-tape drives that
> do not support it. If this is indeed test10, that would mean that
> the HP drive misreports that capability. It'd be nice to know.
>
> --
> * Jens Axboe <[email protected]>
> * SuSE Labs

2000-11-06 15:03:01

by Mike Dresser

[permalink] [raw]
Subject: Re: issues with ide-tape under 2.4.x and with 2.2.x+ide patches

> > ide-tape: ht0: I/O error, pc = 1e, key = 5, asc = 20, ascq = 0
> > ide-tape: ht0: I/O error, pc = 8, key = 5, asc = 2c, ascq = 0
> > ide-tape: ht0: I/O error, pc = 1e, key = 5, asc = 20, ascq = 0
> >
> > (normal, i get those cause of the lock drive/unlock drive, which the
> > drive doesn't support)
>
> Interesting, and this is test10? I submitted a patch for test10 to
> not attempt prevent-removal commands in the ide-tape drives that
> do not support it. If this is indeed test10, that would mean that
> the HP drive misreports that capability. It'd be nice to know.

Confirmed.

promise:~/crap# uname -a
Linux promise 2.4.0-test10 #4 Mon Oct 30 17:16:16 EST 2000 i686 unknown

And i think my clock chip is drifting, it's actually the 6th of November. =)

Anyways...... Spent 15 minutes trying to figure out why it couldn't read the
tape, and kept giving me the errors. Then i remembered the whole point of
this bug-report WAS about it not reading tapes. It's Monday morning, but my
brain is still out there in the wild blue yonder. :)

I'm interested in why the HP drive won't read tapes, but if i swap in my
Seagate, it reads them just fine. Well, aside from media errors. Seems HP
can't build a tape drive OR tape media that is reliable =)