Summary: Question regarding SUN StorEdge Availability Suite

From: Husemann, Harald <harald.husemann_at_Materna.DE>
Date: Tue Mar 18 2003 - 11:33:24 EST
<Original posting below>

Hi all,

and thanks to Darren Dunham and John Riddoch for their responses.
Finally, I got a call from SUN, and they explained it. It's really as I
supposed, although the Config-Location requires only 5.5 MB Diskspace
(You're right, Darren, that's just a small slice), the entire disk cannot be
part of a diskgroup. That makes it impossible to use the disk for storing
other data in a cluster environment, since every metaset had to be part of
diskset.
It's even worse, 'cause you even can't use Software-RAID (like SDS or
Veritas) to mirror the disk holding the config-location - to do this, it
would be necessary that the config-slice is part of a metaset, so, the disk
has to be part of a diskset...
This makes the config-location a classical single point of failure, and - in
my opinion - is not really useful in a HA-environment.
SUN suggests using A3310 Storages or similiar, 'cause these have
HW-RAID-Controllers. With this, it is possible to configure a small LUN of
abt. 10 MB, putting this in a mirrored state with the HW-RAID-Controller,
and use it as a config-location.
Hm, that's of course right, that's the best solution - but, we already
bought the D1000s, so it's more for the future.

Thanks to all, have a nice hackin',

Harald

============================================
Harald Husemann
Systems Engineer
Teammanager Unix administration and Configuration Management
Materna Gmbh - Vo_kuhle 37 -
D-44141 Dortmund, Germany
Phone:  +49-231-5599-8684
Mobile: +49-179-2300651



-----Urspr|ngliche Nachricht-----
Von: Husemann, Harald [mailto:harald.husemann@Materna.DE]
Gesendet: Dienstag, 18. Mdrz 2003 11:37
An: Sunmanagers@Sunmanagers. Org
Betreff: Question regarding SUN StorEdge Availability Suite


Managers,

at the moment, we're "playing around" with the SUN StorEdge Availability
Suite in a SUN Cluster 3.0 Environment.
I've read the documentation, and saw the following:

"The configuration location needed for the Availability Suite must be under
Device ID (DID) Control only, it cannot be under Volume-Manager control. I.
e. it cannot be part of a diskset, and it cannot reside on the boot-device.
Also, the disk must not be used as a quorum device."

Hmmmm... As far as I understand, I have to configure a volume on a disk as
configuration location, and this disk cannot be used to store any data
anymore - wasting almost the whole diskspace, since I have to use a 18
GB-HDD, and the config location just needs 5,5 MB...

Is this right?! I can't imagine, but it seems that's was the docu tells me.
Anyone made experiences with this, and can tell me if I'm right?

Thanks,

and keep on hackin',

Harald

============================================
Harald Husemann
Systems Engineer
Teammanager Unix administration and Configuration Management
Materna Gmbh - Vo_kuhle 37 -
D-44141 Dortmund, Germany
Phone:  +49-231-5599-8684
Mobile: +49-179-2300651
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Received on Tue Mar 18 11:47:22 2003

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