Quoting Paul Haldane <Paul.Haldane AT newcastle.ac DOT uk>:

From: Ian Turner
Sent: 09 May 2006 16:54

On Tuesday 09 May 2006 11:06, Jon LaBadie wrote:
> > My autoloader is on /dev/st0 and tape are defined on /dev/nst0
>
> I don't think so.
> st0 and nst0 are the "same" device handled differenly on close.

The changer is probably on /dev/sg0 or /dev/sg1.

Yup - I would expect the device to use to talk to the changer to be of the form /dev/sgN.

There's a pair of useful utilities that come as part of the mtx RPM - loaderinfo and tapeinfo. If you use these with your sg devices it will soon become clear which one is your changer. Even if you use loaderinfo on a device which points at a tape drive) or even a disk drive) it's pretty obvious what it is. Here's output from one of my machines ...

# loaderinfo -f /dev/sg9
Product Type: Disk Drive
Vendor ID: 'COMPAQ  '
Product ID: 'BD300884C2      '
Revision: 'HPB7'
Attached Changer: No
Bar Code Reader: No
EAAP: No
Transport Geometry Descriptor Page: No
Device Configuration Page: No

# loaderinfo -f /dev/sg10
Product Type: Medium Changer
Vendor ID: 'HP      '
Product ID: 'MSL6000 Series  '
Revision: '0423'
Attached Changer: No
Bar Code Reader: Yes
EAAP: Yes
Number of Medium Transport Elements: 1
Number of Storage Elements: 58
Number of Import/Export Element Elements: 2
Number of Data Transfer Elements: 2
Transport Geometry Descriptor Page: Yes
Invertable: No
Device Configuration Page: Yes
Can Transfer: Yes

# loaderinfo -f /dev/sg11
Product Type: Tape Drive
Vendor ID: 'HP      '
Product ID: 'Ultrium 2-SCSI  '
Revision: 'F43W'
Attached Changer: No
Bar Code Reader: No
EAAP: No
Transport Geometry Descriptor Page: No
Device Configuration Page: No

Paul

Hi evrybody

I have tried to do loader -f /dev/sg0 but :
cannot open SCSI device '/dev/.static/dev/sg0' - No such device or address

root@ubuntu:/# loaderinfo -f /dev/.static/dev/st0
Product Type: Tape Drive
Vendor ID: 'HP      '
Product ID: 'C1557A          '
Revision: 'U812'
Attached Changer: No
EAAP: Yes
Number of Medium Transport Elements: 0
Number of Storage Elements: 6
Number of Import/Export Element Elements: 0
Number of Data Transfer Elements: 1
Transport Geometry Descriptor Page: No
Device Configuration Page: Yes
Can Transfer: No

ERROR: new tape not found in rack
       (expecting a new tape)

Have i a problem with amanda or with mtx ?