topic Re: external tape drive in Operating System - Linux

external tape drive

haeman — Thu, 28 Aug 2008 13:56:17 GMT

I have a external tape drive that connect to the server , I can see the tape drive via my backup software , but when I try to tar file to /dev/st0 , but it not work , what is the device name ( eg. /dev/st0 , /dev/st1 or something ) that the external tape drive atached ? how can i check it ? thx

Re: external tape drive

Ivan Ferreira — Thu, 28 Aug 2008 18:41:09 GMT

The file should be /dev/st0, what is the output of?:

mt -f /dev/st0 status

Â¿What is the error you get when you try to tar to the device?

Â¿What kind of device is it?

Re: external tape drive

yuk1 — Thu, 28 Aug 2008 23:30:56 GMT

thx reply ,

in my system , no /dev/st0 , what device path should I mount to ? thx

#ls /dev/st0
ls: /dev/st0: No such file or directory

Re: external tape drive

Hemmetter — Fri, 29 Aug 2008 05:32:53 GMT

Hi haeman,

What Linux version do you use?
What type is your tape, how is it connected?
Is "st" loaded, check with "lsmod"
Any /var/log/messages?
What says dmesg?

Does it show up in "lsscsi" and /proc/scsi/scsi?

Thats the first points to check.

rgds
HGH

Re: external tape drive

haeman — Sat, 30 Aug 2008 02:50:50 GMT

RH ,

SDLT via scsi

# lsmod |grep st
st 31524 0 (unused)
scsi_mod 115496 5 [sg st aic7xxx ips sd_mod]

# messages |grep tape
Aug 21 09:04:01 ORA kernel: Attached scsi tape st0 at scsi1, channel 0, id
5, lun 0

#dmesg |grep tape
Attached scsi tape st0 at scsi1, channel 0, id 5, lun 0

but the st0 is not present , can advise what is it ? thx

# ls /dev/st0
ls: /dev/st0: No such file or directory

Re: external tape drive

Hemmetter — Sat, 30 Aug 2008 09:15:58 GMT

Hi again haeman,

What Linux/Kernel version is it?

Can do do a "rescan-scsi-bus.sh" if available ( www.garloff.de/kurt/linux/rescan-scsi-bus.sh)

or
# echo "- - - " > /sys/class/scsi_host/host${i}/scan

with ${i} the appropriate number for your scsi-bus.

rgds
HGH

Re: external tape drive

Deepak Kr — Mon, 01 Sep 2008 05:13:00 GMT

Hi,

As asked above provide us version of OS and which Linux distribution are you using here.

Also what is backup software and what you see in that for verifying tape drive.