Very Computer

I have two machines in a rack, set up to do HACMP (or will be, if this
works)...

I have a drawer of SSA drives between them, wired up like a christmas tree,
so that I have lots of redundancy.

I have all SSA-Raid adapters.

What is my limit on initiators per loop, doing RAID-5?

Can I have a RAID-5 hdisk configured and pass it back and forth, with
associated hot spares intact?  How do I go about configuring this beastie?

Last time I did this I just mirrored the drives, but this time we're trying
something new.  Any help is good.
-=-=-=-=-
Dwivian
dwivian at earthlink dot com is wrong, use dot net.

Hi,

the possible configuration depends on your Adapter Hardware. For details you
should contact the IBM storgage pages :
http://www.storage.ibm.com/hardsoft/products/ssa/docs/config_rules.html

In fact I'am no friend of SSA Raid 5. I prefer LVM mirroring.
LVM mirroring work also fine in large configurations and you have always
control over your disks. Additionaly when using AIX 4.3.3 you can do an split
off a mirrored LV. This can be usefull for backup.

Uwe

Two.  Note thats not "two per node"; that's "a total of two on the loop".

--
______________
Tom Weaver        (512) 838 8277, T/L 678-8277

Is it still true that the Cache cards are not supported on the SSA adapters in
a clustered env?

 - Matt
--
_______________________________________________________________________

   << Comments, views, and opinions are mine alone, not IBM's. >>

No.  The most recent version of the SSA raid adapters are able to handle cache
in a clustered environment.  This is the "6225 Advanced SerialRaid" adapter.

--
______________
Tom Weaver        (512) 838 8277, T/L 678-8277

I'm not sure. (Thought I'd never say that.) I think it can work now, but I'd
double check.

--
Urban A. Haas
CEO - Urban Technology, Inc.
Minneapolis, MN  USA
Phone: (952) 595-8810    Fax: (952) 595-8710

Web: http://www.urbantechnology.com

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