[CentOS] Problems with LTO-3 and U320 on Centos 4.4
wpilorz at bdk.pl
Wed Nov 8 13:01:19 UTC 2006
On Wed, 8 Nov 2006, Joshua Baker-LePain wrote:
> Date: Wed, 8 Nov 2006 07:43:23 -0500 (EST)
> From: Joshua Baker-LePain <jlb17 at duke.edu>
> Reply-To: CentOS mailing list <centos at centos.org>
> To: CentOS mailing list <centos at centos.org>
> Subject: Re: [CentOS] Problems with LTO-3 and U320 on Centos 4.4
> On Wed, 8 Nov 2006 at 12:21pm, Adam Huffman wrote
> > Apologies for hijacking the thread, but I'm seeing speeds of only around
> > 30MB/s with an LTO3 library connected via 2Gb fibre channel, both with
> > tar and with Bacula.
> > Would you know how to go about investigating this?
> What blocksize are you using? That has the biggest impact on tape
> performance of any of the factors I've looked at.
I had some experiences with much slower systems (both tapes, connections
and CPU/memory) when to get any performance close to rated tape speed, I
had to use buffering (there was buffer utility); I guess -fifo feature of
star should be looked at.
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