RAID5 SSA Array (Basic Questions) 2

[TSch]

Hi folks,

we're trying to build a raid5 ssa array on one of our system..

The following questions came up so far:

1) How do we create a "candidate" disk for raid5 out of normal ssa disks ?

2) We'd like to use one disk for hot spare. Do we define this disk as a normal array member disk under smit and enable "use of hot spare disks" or do we have to create a separate "hot spare pool" and put the hot spare disk into that pool ? Would we also have to enable "use of hot spare disks" when defining the raid5 array using this option ?

Thanks in advance !

Regards
Thomas

 

[PSD]

Tsch,

Well simple really :

1) work out which disk you want to use in the raid array - that is the pdisk number : ssaxlate -l hdisk<>

smitty ssaraid

Change show/use of an SSA physical disk - select your pdisk

In the Current Use field F4 and select RAID candidate.

et voila...

2) You do not add the disk to the RAID array - identify which disk you want to be the hot spare and repeat the procedure above - i.e. but change the Current Use field to Hot Spare Disk. You will need to set the attribute &quot;Enable Use of hot spares&quot; to yes when creating the array.

Best of luck
PSD
IBM Certified Specialist - AIX V4.3 Systems Support
IBM Certified Specialist - AIX V4 HACMP

 

[TSch]

It worked so far...

I've also created a hot spare disk via your discription.
I can identify as well as list this disk. It comes up as &quot;spare&quot; with status &quot;good&quot;.

But whenever I try to &quot;add a hot spare pool&quot; the system tells me &quot;no item of this type available&quot; ...

What's wrong here ?

Regards
Thomas