Hello,

I can offer 1 data point of E2K on a SAN:

It worked fine for about a year, but then began failing about every 3 weeks.  Several 
of the failures required Disaster Recovery for the DBs.  Strangely it always happened 
just before I was going on a vacation, which does something bad for Quality of Life if 
you're married, etc...

Vendor replaced just about every single piece of hardware over the various failures.  
On the last one I DR'd to a JBOD we had laying around and everything has been fine 
since.  A relaxing Thanksgiving.

I had great hopes for Snapshotting and other such SAN possibilities, but Exchange 
doesn't support those natively.  And they aren't about to spend the money here for 
higher end Backup software like Comm Vault, etc...  So, that SAN got me nothing in 
added functionality, just a lot of aborted vacations.

YMMV, but what added functionality are you hoping to get from the SAN?  Are you sure 
Exchange/OS will actually support it?  And from the other E2K shops I know ... it 
looks like Clustering one way or the other ends up reducing your reliability and 
up-time.  But, if you're own of those Admins without family or interest in vacations 
there could be merit in these options.

Brent

-----Original Message-----
From: Hansen, Eric [mailto:[EMAIL PROTECTED]]
Posted At: Friday, December 06, 2002 10:42 AM
Posted To: MS Exchange List
Conversation: the IBM Shark
Subject: RE: the IBM Shark


Hehe

That would be me.  :|

We'll see how it goes.

-----Original Message-----
From: Schwartz, Jim [mailto:[EMAIL PROTECTED]] 
Sent: Friday, December 06, 2002 11:02 AM
To: Exchange Discussions
Subject: RE: the IBM Shark

You keep thinking your happy thoughts. <g>

Who is going to be running your SAN? If you find yourself arguing the
difference between spindles and storage space, you're going to have a grand
old time.

The architecture for the large SAN vendors was based on the limitations in
the IBM 3xxx mainframe systems. It was more cost effective to place large
amounts of cache in the storage system to accommodate its predictable, read
IO operations. You'll find that the typical answer to any issue you have
with a large SAN is to throw more hardware at it.

-----Original Message-----
From: Hansen, Eric [mailto:[EMAIL PROTECTED]] 
Sent: Friday, December 06, 2002 12:18 PM
To: Exchange Discussions
Subject: RE: the IBM Shark


:p that could be solved with proper planning and good lun management.  

-----Original Message-----
From: Schwartz, Jim [mailto:[EMAIL PROTECTED]] 
Sent: Friday, December 06, 2002 9:01 AM
To: Exchange Discussions
Subject: RE: the IBM Shark

You're going to carve up the disks and share spindles with "critcal" servers
running high intensive databases? <snicker>

Good luck.

-----Original Message-----
From: Hansen, Eric [mailto:[EMAIL PROTECTED]] 
Sent: Friday, December 06, 2002 10:52 AM
To: Exchange Discussions
Subject: RE: the IBM Shark


We plan on using it for our 17 "critical" servers and to cut the prices of
all the disk we have.  Mostly Windows/SQL, and some AIX and linux.  Out the
door we were going to start with 3tb so the rumor of a 3.36tb performance
boundary made me a little wary, but I'm not sure if there is any truth to
it.

e-

-----Original Message-----
From: John Allhiser [mailto:[EMAIL PROTECTED]] 
Sent: Friday, December 06, 2002 8:47 AM
To: Exchange Discussions
Subject: RE: the IBM Shark

As DASDI for os390/Zos mainframes they're great.
Not aware of the exact performance boundary.
What do you plan to use them for.

-----Original Message-----
From: Hansen, Eric [mailto:[EMAIL PROTECTED]] 
Sent: Friday, December 06, 2002 9:29 AM
To: Exchange Discussions
Subject: OT: the IBM Shark


Is anyone here happen to be running a IBM shark or possibly a Hitachi 9900
series SAN?  We are looking at both of these and I have heard rumors that
the shark has a performance boundary of 3.36 TB.  Just curious.

e-

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