RE: Cybernetics HSTC

I'll mirror what John says.  Jumping from a 7xx box to a 8xx box was a 
huge increase in tape drive performance.

Rob Berendt
-- 
Group Dekko Services, LLC
Dept 01.073
PO Box 2000
Dock 108
6928N 400E
Kendallville, IN 46755
http://www.dekko.com





"Jones, John (US)" <John.Jones@xxxxxxxxxx> 
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01/31/2005 04:53 PM
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RE: Cybernetics HSTC






If you're doing it purely for performance, make sure your current tape
technology is the actual bottleneck.  A sample of our backup rates to
3580 LTO2:

730 (2000 CPWs, V5R1, 6534 controller): 70GB/hour
830 (1850 CPWs, V5R1, 2729 controller): 203GB/hour
i5 570 (6000 CPWs, V5R3, 5702 controller): 270+GB/hour

All tests were libraries with 70+GB and 4000+ objects (JDE database),
save settings included DTACPR(*YES).

Only the i5 actually pegs what the tape drive can handle; the other two
are hitting other limits in the AS/400.  For the 730, I'm firmly
convinced it's the SPD bus.  For the 830, it might be the PCI bus; I
never really investigated as it was 'fast enough', especially when
compared to the 730.

Also, again if backup window is a concern, would the faster
checkpointing in V5R3 help?

John A. Jones, CISSP
Americas Information Security Officer
Jones Lang LaSalle, Inc.
V: +1-630-455-2787  F: +1-312-601-1782
john.jones@xxxxxxxxxx

-----Original Message-----
From: Jeff Green [mailto:jgreen@xxxxxxxxxxxx] 
Sent: Monday, January 31, 2005 3:45 PM
To: midrange-l@xxxxxxxxxxxx
Subject: Cybernetics HSTC

We are considering a disk to disk to tape backup solution from
Cybernetics called the HSTC.  It's essentially a terabyte of disk with
software to make it look like LTO tapes, and an attached LTO tape drive.
Has anyone had any experience with this unit or this type of solution?
Any gotchas you could share?
 
Jeff Green
ERP Manager
Metal Sales Manufacturing
Sellersburg, IN 47172
 <http://www.mtlsales.com> www.mtlsales.com



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