RE: rh-l] Redhat ES4 and DLT tape drive

From: Greg Wiggill (gregw_at_pronto.com.au)
Date: 05/30/05

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    Date: Mon, 30 May 2005 16:26:34 +1000
To: "General Red Hat Linux discussion list" <redhat-list@redhat.com>

    On Fri, 27 May 2005, Greg Wiggill wrote:

    > Hi All,

    > anyone experiencing anything similar? Im thinking that a driver

    > is having a problem with the 2.6 kernel? Any ideas?

    The scsi module often gets auto-cleaned away if the tape channel is the
    only LUN on it. re-probe it in and check the lsmod before fireing off
    the backup.

    I might also thing about pre-computing the file list, with find, and
    then 'cat'ting it, rolling the backup in a later phase, rather than the
    pipelined approach, so that there are not 'find' induced waits, as would
    occur the dd catches up with the cpio, and the cpio inout is blocked, as
    the find has not yet offered the next name to handle.

    (the reason that the module might get auto-cleaned away again, during
    such waits.)

    - Russ herrold

    Thanks Russ,
           
            turns out the server has been spec'd incorrectly and the tape
    drive (DLT VS160) needs to be on a separate dedicated SCSI controller
    rather than on the ServerRAID 7k's 2nd onboard channel.

            Also found out that IBM don't support ES Version 4 for their
    xSeries236!

    Greg
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