RE: Cybernetics HSTC

We're not really looking at the performance benefits, although they will be
a nice bonus.  We are replacing a 3570 and looking at the advantages of
fewer tapes that hold more data, plus a comprehensive solution to backup up
all the servers, Windoze and iSeries alike.

Jeff Green
ERP Manager
Metal Sales Manufacturing
Sellersburg, IN 47172
www.mtlsales.com



-----Original Message-----
From: Jones, John (US) [mailto:John.Jones@xxxxxxxxxx] 
Sent: Monday, January 31, 2005 16:54
To: Midrange Systems Technical Discussion
Subject: 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