Hi,

I wonder what transfer rates (move data from drive to drive) I am
supposed to see with LTO3.

I have two TSM servers, one 32-bit Win2k3 and one 64-bit 2.6.9-11.Elsmp,
with a SL500 and FC LTO3 drives. 
Similar HW (HP DL585) except for one server have HP- and the other have
IBM drives. Drives are on separate PCI busses.

I used a dataset of 50Gb with large files, same file type on both
systems. Only scratch tapes and no expiration on the datasets.
No other tape activity on the systems during the tests.

I tested disk->mt0->mt1->mt2->mt3->mt1->mt0->disk
>From disk to tape I get a throughput of 74-76Mb/s with IBM drives,
(migration).
>From tape to tape, (move data), with HP drives I get a throughput of
30-46Mb/s and with IBM drives I get 39-59Mb/s.
>From disk to tape, (move data), with IBM drives I get a throughput of
44Mb/s.

Apperently write speed seems OK but read spead is an issue?! Or is this
normal?



Thanks
Henrik




















-------------------------------------------------------------------
The information contained in this message may be CONFIDENTIAL and is
intended for the addressee only. Any unauthorised use, dissemination of the
information or copying of this message is prohibited. If you are not the
addressee, please notify the sender immediately by return e-mail and delete
this message.
Thank you.