[clug] LTO-4 drive, turn on compression? [SEC=PERSONAL]

Roppola, Antti - BRS Antti.Roppola at daff.gov.au
Wed Aug 12 23:33:20 MDT 2009

On our Exabyte drives, the compression settings showed up as devices (on
Solaris anyway).

So something like....

  tar cvf /dev/nrst7

Would do a vanilla EXB-8200 write, while....

  tar cvf /dev/nrdst21

Would write to the drive as EXB-8500 in a compressed format. (and nrst14
would be uncoompressed EXB-8500)

However I'm pretty sure the same device mapping behaviour didn't occur
with Linux, or it could be I only had a vanilla 8200 drive.



-----Original Message-----
From: linux-bounces at lists.samba.org
[mailto:linux-bounces at lists.samba.org] On Behalf Of Chris Smart
Sent: Tuesday, 11 August 2009 9:04 AM
To: CLUG List
Subject: [clug] LTO-4 drive, turn on compression?

Anyone know how to turn on compression on an LTO-4 tape drive?
Have tried:
mt -f /dev/nst0 compression 1

But that didn't work. The man page is not super helpful and my Google-fu

I have a Quantum SAS connected LTO-4 drive which works a treat, but I'd
like to backup more than 800GB onto a single tape.

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