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tar command on ultrium sb920c tape blade

maurizio di salvo
Frequent Advisor

tar command on ultrium sb920c tape blade

Good morning, i have installe on c3000 tape blade the installation is ok. on the blade server ( the partner server of tape is a node of cluster ) i have red hat os i want know the command for backup file or directory. how to know the tape device ?? es: /dev/rmt0? or /dev/st0? and hoe to use the tar command ??

thanks for all
4 REPLIES
Matti_Kurkela
Honored Contributor

Re: tar command on ultrium sb920c tape blade

If you have RHEL 5, you can use the "lsscsi" command to see a listing of all SCSI and SCSI-like devices (FibreChannel, USB, Firewire, SATA...). It's very useful.

The "lsscsi" command is not installed by default; use "yum install lsscsi" if you don't have it installed yet.

With older versions, run "dmesg | less" to look at the kernel message buffer: when the kernel detects the tape drive, it prints out a message that includes the device name.

Most likely the "base" device name is /dev/st0. There is typically also /dev/nst0, the "no-auto-rewind" version of the device.

If you use /dev/st0, the tape is automatically rewound back to the beginning after each tape-access command is completed. Depending on what you're doing, you may or may not want that.

On the use of the tar command: use the command "man tar" to read the manual. The "tar" command has a *lot* of options.

MK
MK
Michael Steele_2
Honored Contributor

Re: tar command on ultrium sb920c tape blade

Hi

Use 'tar' in conjunction with 'mt'

'mt'

http://man.he.net/?topic=mt&section=all

'tar'

http://man.he.net/?topic=tar&section=all

All Linux Man pages

http://man.he.net/

Example:
Use /dev/nst0 - no rewind as well as /dev/st0.

cd dir
tar -cvf /dev/st0 *.*
tape finishes

Verify tape
tar -Tvf /dev/st0

Use mt like so

mt /dev/nst0 fsf 1 (* move tape one record ahead *)

mt /dev/st0 rew (* rewind *)
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maurizio di salvo
Frequent Advisor

Re: tar command on ultrium sb920c tape blade

thanks now is ok. the device is st0 and i have use tar command tar -cvf /dev/st0.
maurizio di salvo
Frequent Advisor

Re: tar command on ultrium sb920c tape blade

tha