Problems with Quantum DLT 4000 + HP C5173-4000

Problems with Quantum DLT 4000 + HP C5173-4000

[ajit k jena]

Hi,

I hope the problem I am posting is appropriate for this forum.

We have a Quantum DLT 4000 SCSI-2 tape device connected to a
RedHat Linux 7.1 box using BusLogic BT-950 card.

When the system boots, we get the following messages on the
screen:

	Vendor: HP Model: C5173-4000 Media Changer Rev: 3.02
	Vendor: Quantum Model: DLT4000 Rev: CD3C

The /var/log/messages file shows the following message:

	st0: Block limits 1-16777215 bytes.

When I use the mtx utility on /dev/sg0, things are OK. I am
able to do 'inquiry', 'status', 'load', 'unload' operations
properly.

I put a tape cartridge into the drive by using the command

	mtx -f /dev/sg0 load 1

Then I use the mt command as below:

	mt -f /dev/st0 status

	the output is:

	SCSI 2 tape drive:

	File number = 0, block number=0, partition=0
	Tape block size 0 bytes, Density code 0x1a
				(unknown to this mt)
	Soft error count since last status=0
	General status bits on (41010000):
		BOT ONLINE IM_REP_EN

I am using HP 1/2" DLTtape IV Data cartridge.

When I try to do a tar onto the tape, I get the message:

	Wrote only 0 of 10240 bytes
	Error is not recoverable: exiting now

The tape unit was attached to an HP9000 system before. The
HP DLTtape IV cartridges are recommended for this drive.
I thought there may something wrong with the particular
cartridge and so I even tried brand new cartridges. The
results are the same every time.

Can someone please help me understand the problem here ?
I hope to benefit from someone else's experience in this
regard.

Thanks for your time.

--ajit

|-----------------------------------------------------------------|
| Ajit K. Jena                      Phone :                       |
|                                     Office +91-22-5767751       |
| Computer Centre                            +91-22-5722545 x8750 |
| Indian Institute of Technology      Home   +91-22-5722545 x8068 |
| POWAI, Bombay                     Fax   :        +91-22-5723894 |
| PIN 400076, India                 Email :    ajit@cc.iitb.ac.in |
|-----------------------------------------------------------------|

Re: Problems with Quantum DLT 4000 + HP C5173-4000

[Erik Mouw]

On Wed, Sep 12, 2001 at 10:05:17AM +0530, ajit k jena wrote:
> We have a Quantum DLT 4000 SCSI-2 tape device connected to a
> RedHat Linux 7.1 box using BusLogic BT-950 card.

[...]

> When I try to do a tar onto the tape, I get the message:
> 
> 	Wrote only 0 of 10240 bytes
> 	Error is not recoverable: exiting now

Try to play with the "-b" option to get a correct blocking size. 10,
20, and 40 are useful numbers to try. It worked for me with a DLT 7000
tape drive connected to an SGI Origin200, though IRIX is not that
verbose in its error messages.

> The tape unit was attached to an HP9000 system before. The
> HP DLTtape IV cartridges are recommended for this drive.
> I thought there may something wrong with the particular
> cartridge and so I even tried brand new cartridges. The
> results are the same every time.

In my experience the brand of tapes doesn't matter. We use a mix of
Sony, Quantum, and Fuji tapes without any problem.


Erik

-- 
J.A.K. (Erik) Mouw, Information and Communication Theory Group, Department
of Electrical Engineering, Faculty of Information Technology and Systems,
Delft University of Technology, PO BOX 5031,  2600 GA Delft, The Netherlands
Phone: +31-15-2783635  Fax: +31-15-2781843  Email: J.A.K.Mouw@its.tudelft.nl
WWW: http://www-ict.its.tudelft.nl/~erik/

Re: Problems with Quantum DLT 4000 + HP C5173-4000

[Stephan von Krawczynski]

On Wed, 12 Sep 2001 10:05:17 +0530 (IST) ajit k jena <ajit@indica.iitb.ac.in>
wrote:

> 
> Hi,
> [...] 
> Then I use the mt command as below:
> 
> 	mt -f /dev/st0 status
> 
> 	the output is:
> 
> 	SCSI 2 tape drive:
> 
> 	File number = 0, block number=0, partition=0
> 	Tape block size 0 bytes, Density code 0x1a
> 				(unknown to this mt)
> 	Soft error count since last status=0
> 	General status bits on (41010000):
> 		BOT ONLINE IM_REP_EN

That seems to be normal. I have the merely the same output on a HP Surestore
DLT.

> I am using HP 1/2" DLTtape IV Data cartridge.
> 
> When I try to do a tar onto the tape, I get the message:
> 
> 	Wrote only 0 of 10240 bytes
> 	Error is not recoverable: exiting now

Try to set a valid blocksize _before_ tar. Like mt setblk 32768.
DLT may have problems otherwise. Find a correct blocksize in your manual.

Regards,
Stephan

Problems with Quantum DLT 4000 + HP C5173-4000

[ajit k jena]

Hi,

I hope the problem I am posting is appropriate for this forum.

We have a Quantum DLT 4000 SCSI-2 tape device connected to a
RedHat Linux 7.1 box using BusLogic BT-950 card.

When the system boots, we get the following messages on the
screen:

	Vendor: HP Model: C5173-4000 Media Changer Rev: 3.02
	Vendor: Quantum Model: DLT4000 Rev: CD3C

The /var/log/messages file shows the following message:

	st0: Block limits 1-16777215 bytes.

When I use the mtx utility on /dev/sg0, things are OK. I am
able to do 'inquiry', 'status', 'load', 'unload' operations
properly.

I put a tape cartridge into the drive by using the command

	mtx -f /dev/sg0 load 1

Then I use the mt command as below:

	mt -f /dev/st0 status

	the output is:

	SCSI 2 tape drive:

	File number = 0, block number=0, partition=0
	Tape block size 0 bytes, Density code 0x1a
				(unknown to this mt)
	Soft error count since last status=0
	General status bits on (41010000):
		BOT ONLINE IM_REP_EN

I am using HP 1/2" DLTtape IV Data cartridge.

When I try to do a tar onto the tape, I get the message:

	Wrote only 0 of 10240 bytes
	Error is not recoverable: exiting now

The tape unit was attached to an HP9000 system before. The
HP DLTtape IV cartridges are recommended for this drive.
I thought there may something wrong with the particular
cartridge and so I even tried brand new cartridges. The
results are the same every time.

Can someone please help me understand the problem here ?
I hope to benefit from someone else's experience in this
regard.

Thanks for your time.

--ajit

|-----------------------------------------------------------------|
| Ajit K. Jena                      Phone :                       |
|                                     Office +91-22-5767751       |
| Computer Centre                            +91-22-5722545 x8750 |
| Indian Institute of Technology      Home   +91-22-5722545 x8068 |
| POWAI, Bombay                     Fax   :        +91-22-5723894 |
| PIN 400076, India                 Email :    ajit@cc.iitb.ac.in |
|-----------------------------------------------------------------|