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, as
you say, the tape drive itself is a standard lto4 from HP. The old
internal 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 be
inclined (as Paul suggested) to run amtapetype. It will take a long
time, but it will spit out a configuration specific to your server, and
you will see how your server handles the tape drive. And, actually, it
would take less time than this thread has been running. ;-)
Then compare your configuration to the published specifications for the
drive (see, e.g.
http://en.wikipedia.org/wiki/Linear_Tape-Open#Generations).
Theoretically, you should get somewhere up around 120MB/s. If you end up
with a speed down around 31MB/s as the one configuration someone posted
on the wiki, then you probably need to evaluate your backup server,
because it's not keeping up with the tape, and the tape is probably
shoe-shining.
---------------
Chris Hoogendyk
-
O__ ---- Systems Administrator
c/ /'_ --- Biology & Geology Departments
(*) \(*) -- 140 Morrill Science Center
~~~~~~~~~~ - University of Massachusetts, Amherst
<hoogen...@bio.umass.edu>
---------------
Erdös 4
Uwe Bartels wrote:
Hi,
does any has experiences with amanda and sun(storagetek) sl24 or
better 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 - HP
LTO4-800 tape"?
best regards,
Uwe
2009/5/18 Paul Bijnens <paul.bijn...@xplanation.com
<mailto:paul.bijn...@xplanation.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
}