topic Re: EMC cx400 disks & luns in Disk Enclosures

EMC cx400 disks & luns

Ian Vaughan — Wed, 04 Dec 2002 15:31:03 GMT

We are thinking about purchasing an EMC cx400 for use in a mixed HP-UX and win2K environment. Can this class of array do mirroring / striping etc only at the whole disk level or can the disks (73GB) be carved up into LUNs and then the LUNs mirrored / made part of a raid set etc ?
TIA
Ian

Re: EMC cx400 disks & luns

Stephanie Nicholls — Thu, 05 Dec 2002 22:46:00 GMT

Hi

We are in the same situation, looking at purchasing a CX400. My understanding of the beast is that you combine whole disks from teh array into RAID groups, and then assign a 'slice' of the raid group to be a LUN.

Regards

Steph

Re: EMC cx400 disks & luns

Michael Tully — Fri, 06 Dec 2002 01:20:25 GMT

First place to look would be what EMC has to say from their blurb:

http://www.emc.com/products/systems/clariion_cx400.jsp

Second: if you have an EMC engineer, ask home/her for the information. Ours is excellent.

Re: EMC cx400 disks & luns

Vincent Fleming — Fri, 06 Dec 2002 01:29:48 GMT

The EMC does behave as you describe. This is the traditional way of implementing RAID.

What you describe as "carved up into LUNs and then the LUNs mirrored" is what we at HP call Virtualization.

Virtualization actually works by allowing you to define a LUN at a RAID level, and the array applies the RAID level on the fly as you use the LUN. This allows a group of drives to have LUNs on it that use different RAID levels (RAID 1/0 and RAID 5 for example).

HP Products are currently the only ones on the market that do RAID this way - and we have 2 product lines that do it - the EVA and the VA7000 products (VA7100, VA7410).

I hope this helps - Good luck!

Re: EMC cx400 disks & luns

Marek Kormanovic_1 — Fri, 24 Jan 2003 16:07:51 GMT

Hi Ian.

we have CX600, and prepearing migration from MA8000 to CX600.

PLS can you specify servers farm and OS environment ?

Witch type of FC SWITCH are you using ?

If you are using Claster PLS specify ?

THX. MAREK.