[Networker] Cloning from Disk

Good morning to all,
Just need to clarify and ask some question regarding cloning.
We are currently using an AX100i Storage Array for our disk backup with 12x 7.2 
RPM SATA disk drives.
On backup process, I'm getting a descent throughput of 25 to 30 MB/s, but when 
I start the cloning session, the throughput drops down to 10 to 15 MB/s.
Here's a possible explanation on the throughput issue, during backup, data is 
written to disks at random while on cloning, Legato NetWorker is 
de-multiplexing the savesets from the disk before it saves it to tapes, thus 
reducing the throughput. Is this how is supposed to be? Is there anyway to 
speed up cloning? or this any other faster method/process to transfer the data 
from disk to tape?

Environment:
Server: PowerEdge 2850 dual 3.2 GHz processor with 4 GB RAM
O/S: Red Hat ES 3
NICs: 2 Intel PRO/1000 MT connected directly to tha AX100i storage array
Tape Library/Drive: ADIC Scalar 100 with 2 LTO-2 tape drives (scsi 
connectivity).

thanks in advance,

Librado Pamintuan
Technical Support Analyst II
Information Systems Dep.
Operations Group
City of Regina

Phone:          (306) 777-7573
General Fax: (306) 777-6804
eFax:             (306) 546-6002
eMail:            lpamintuan AT regina DOT ca



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