SLUG Mailing List Archives
Re: [SLUG] mt for backup to DAT tape
- To: slug@xxxxxxxxxxx
- Subject: Re: [SLUG] mt for backup to DAT tape
- From: Jobst Schmalenbach <jobst@xxxxxxxxxxxxxx>
- Date: Wed, 17 Sep 2008 09:33:33 +1000
- Organization: Barrett Consulting Group Pty Ltd
- User-agent: Mutt/1.5.14 (2007-02-12)
On Sun, Sep 14, 2008 at 07:31:20PM +1000, Ben Donohue (donohueb@xxxxxxxxxxxx) wrote:
> Thanks Mick,
> that worked. mt installed now.
> now i'm trying to figure out what device it is...
> I have two DAT drives connected via SCSI.
> the command
> |mt -f /dev/st0 status
> says no such file or directory.
Depending on the version of OS (later Fedora only install the devices
that are actaully in the system) I would:
ls -al /dev/nst*
ls -al /dev/st*
to see WHICH devices are available and then decide what you need to do,
mt -f /dev/nst0 status
which should yield something like (if there is NO TAPE in the drive)
SCSI 2 tape drive:
File number=-1, block number=-1, partition=0.
Tape block size 0 bytes. Density code 0x0 (default).
Soft error count since last status=0
General status bits on (50000):
There are two types of tapes nstX and stX where X is the number of the tape device.
Both indicate tape driver, and point to the same device.
The major difference is after performing a task, /dev/st0 will rewind to the begining of the tape, but /dev/nst0 won't.
If you do not see any of those devices (assuming you have
a SCSI adapter) I would do a
ls -al /proc/scsi
to see what ADAPTORS your system can see. If you do not
see any like for example in my case
dr-xr-xr-x 4 root root 0 2008-09-17 09:14 .
dr-xr-xr-x 161 root root 0 2008-04-08 18:07 ..
dr-xr-xr-x 2 root root 0 2008-09-17 09:25 aic7xxx
-r--r--r-- 1 root root 0 2008-09-17 09:25 device_info
-r--r--r-- 1 root root 0 2008-09-17 09:25 scsi
dr-xr-xr-x 2 root root 0 2008-09-17 09:25 sg
then you have a driver problem AND/OR your system cannot
see the adaptor. If you can see something I would
ls -la aic7xxx/
or whatever your driver of your adaptor is named to
see whether the drives are recognised.
> Are these devices supposed to be detected on startup?
> Or do I make the directories and then they will be detected, or
> different devices not st0 or st1?
> I'm currently looking for info on this but any pointers greatly appreciated.
> Mick Pollard wrote:
> >On Sun, 14 Sep 2008 00:28:36 +1000
> >Daryl Thompson <daryl.francis.thompson@xxxxxxxxx> wrote:
> >>Hi Ben
> >>you should be able to install the mt with
> >>yum install mt
> >make that
> >yum install mt-st
> >It is in the base repo of CentOS 5.2
> >>note this will need to be run as root
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