On Wed, May 10, 2006 at 09:04:30AM +0200, Stefan MARTEL wrote:
> Quoting Ian Turner <ian AT zmanda DOT com>:
> 
> >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.
> >--
> >Wiki for Amanda documentation: http://wiki.zmanda.com/
> >
> 
> 
> the problem is that in /dev i don't have sg0 or sg1

You have /dev/.static/dev/sg0.  Is there also in that
directory other sg#'s and st#'s?  I'm unfamiliar with
ubuntu's /dev/.static   But the tape drive (you see it
on sg0, and the changer mechanism, should appear as
different devices.

You earlier said your tape hardware was an HP 24x6.

> Product ID: 'C1557A

When I install this unit on Solaris or linux, the two
devices come in as the same scsi id number,
but different LUN's.

  # tapeinfo -f /dev/sg0
  Product Type: Tape Drive
  Vendor ID: 'HP      '
  Product ID: 'C1557A          '
  Revision: 'U610'
  Attached Changer: No
  MinBlock:1
  MaxBlock:16777215
  SCSI ID: 5                    <=======
  SCSI LUN: 0                   <=======
  Ready: no

  # tapeinfo -f /dev/sg1
  Product Type: Medium Changer
  Vendor ID: 'HP      '
  Product ID: 'C1557A          '
  Revision: 'U610'
  Attached Changer: No
  SCSI ID: 5                    <=======
  SCSI LUN: 1                   <=======
  Ready: no

If your hardware or kernel is not scanning on boot for
LUN's greater than 0, it may be missing the changer.

This HP model has several configuration switches, some
on the back panel and some internal (may require removal
for access).  Some of these have to be set to OS-specific
settings (AIX, HP-UX, Solairs, Windows, ...)  It made a
big difference when I used that same unit on my Solaris
system.  If you don't have an installation manual, you
might want to check HP's very good web support pages
for the manual and look up what the settings should be
for linux.  Then confirm your device is correctly set.

Then check your kernel settings (I'm not sure how to
check this, but others will chime in) to be certain
you are scanning for LUN's > 0.

-- 
Jon H. LaBadie                  jon AT jgcomp DOT com
 JG Computing
 4455 Province Line Road        (609) 252-0159
 Princeton, NJ  08540-4322      (609) 683-7220 (fax)