G'day Rex, 

The Hitachi RAID300, RAID400, RAID450 and RAID500 hardware is the same
for HDS/HP .. 

Here is a table of comparison models.

XP256   RAID300  DKC310  7700E (Enhanced) 
XP512   RAID400  DKC410  9960 
XP48             DKC415I 9910 
XP1024  RAID450  DKC460I 9980V 
XP128            DKC465I 9970V 
XP12000 RAID500  DKC510I TagmaStore USP (Universal Storage Platform) 
XP10000          DKC515I TagmaStore NSC(Network Storage Controller 

We (HP) just change the door panels and add some software (dialhome
monitoring stuff) to the SVP inside the XP.  HP has very good working
relationship with the factory and input into the microcode generation
process just as I'm sure HDS do. A company the size of HP obviously has
some good Open-Systems, FC and SCSI nous that Hitachi would find useful,
so I'm sure it is collaborative.

HP writes all kinds on SAN management and Performance Management
software (Commandview XP, Performance Advisor XP etc .. ) for the XP and
other arrays... But the core software that runs on the XP for things
like data replication (Trucopy, Shadowimage, HUR, Flashcopy etc... ) is
the same when provided by HP as that provided by HDS, just given a
different name (to confuse people like me and Ron) and a different
manual. 

IMO (and in my experience), the deciding differentials between all IT
hardware on this scale is rarely technical, but financial ... that is
why re-sellers exist.  

Cheers. 

Maurice Clark
Storage Specialist
AP Enterprise Solution Centre
Hewlett-Packard Australia Limited


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