From: Schaper, Soeren (Schaper@media-saturn.com)
Date: Thu Feb 12 2004 - 08:32:40 EST
Hi Managers,
I've got 2 AIT tape drives ( rmt/2 and rmt/3 ) connected to a V880
for the last 2 years they where running without problems. Suddenly the
tranfer rate on one of these tape drives has gone down. While rmt/3 has
tranfer rates between 5 to 8MB, rmt/2 only reaches 1.5 to 2.3MB. If I write
data an both tapes at the same time, rmt/3 also drops his transferrate to
about 2MB. That leaves me with the fact that using only one drive ( rmt/3 )
for backup is actually faster than using both.
I already did the following:
1. Running an backup via backup software, same backup on each tape. Same
transfer rates as above.
2. Running tar manually on both drives. Same transfer rates as above.
3. Replaced the slow drive with new hardware ( 2 times ). No improvement.
4. Checked sd.conf ( even if that are global configurations that can not
affect only one drive ).
Has anyone an idea what happens here or where to look further ?
Regards
Soeren
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