Re: support for tape library sun sl24 or sun sl48

I use a lot of Sun equipment, but I haven't splurged on Sun tape drives(they haven't come up on the education deals for one thing). However, asyou say, the tape drive itself is a standard lto4 from HP. The oldinternal DAT drives on some of my Sun servers are also standard HP.

You could use one of the tapetypes from the wiki, but I would beinclined (as Paul suggested) to run amtapetype. It will take a longtime, but it will spit out a configuration specific to your server, andyou will see how your server handles the tape drive. And, actually, itwould take less time than this thread has been running. ;-)

Then compare your configuration to the published specifications for thedrive (see, e.g.http://en.wikipedia.org/wiki/Linear_Tape-Open#Generations).Theoretically, you should get somewhere up around 120MB/s. If you end upwith a speed down around 31MB/s as the one configuration someone postedon the wiki, then you probably need to evaluate your backup server,because it's not keeping up with the tape, and the tape is probablyshoe-shining.



---------------

Chris Hoogendyk

-
  O__  ---- Systems Administrator
 c/ /'_ --- Biology & Geology Departments
(*) \(*) -- 140 Morrill Science Center

~~~~~~~~~~ - University of Massachusetts, Amherst

<hoogendyk AT bio.umass DOT edu>

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Erdös 4




Uwe Bartels wrote:

Hi,

does any has experiences with amanda and sun(storagetek) sl24 orbetter sl48 with 2 lto4 tape drives?

the tape drives are normal lto4 tape drive from HP.

Or can I simply take the configuration from the "Arcvault 48 - HPLTO4-800 tape"?


best regards,
Uwe

2009/5/18 Paul Bijnens <Paul.Bijnens AT xplanation DOT com<mailto:Paul.Bijnens AT xplanation DOT com>>


    On 2009-05-18 16:28, Uwe Bartels wrote:

        Hi,

        does anybody know if the tape library sun(storagetek) sl24 or
        sun(storagetek) sl48 with 2 lto4 tape drives are working?

        If so. how are the general parameters, which i'm missing in
        the "Tape Type List
        <http://wiki.zmanda.com/index.php/Tapetype%20definitions> ".


    http://wiki.zmanda.com/index.php/Tapetype_definitions#LTO4

    Dell PowerVault LTO4-120 - LTO4-800 tape

    define tapetype LTO4 {
      comment "Dell LTO4 800Gb - Compression Off"
      length 802816 mbytes
      filemark 0 kbytes
      speed 52616 kps
    }

    Arcvault 48 - HP LTO4-800 tape

    define tapetype HPLTO4 {
      comment "HP LTO4 800gb - Compression Off"
      length 772096 mbytes
      filemark 0 kbytes
      speed 31368 kps
    }