RAID5 on AIX 3

[teddy74]

Hi all !

How can i implement RAID5 on AIX ?
I mean i have SSA disk subsystems attached to my aix
box , currently i am just using the physical volumes
as is and using volume management from AIX , can i
create RAID5 volumes or logical drives on the SSA
disksubsystem ?, all your ideas and suggestions r
welcome, thanks for any help
Rajesh rajeshrcmc@hotmail.com
"Better to ask a question once and be thought a fool once, than never to ask and remain a fool forever"

 

[PSD]

rajesh,

Take a look at smitty ssaraid

If you have SSA adapters and disks then yes you can set up RAID 5 and if you have the 4-P adapters and beyond you can look at RAID 0+1 with is striping amd mirroring - this is a whole lot faster.....

Take a look a the following redbooks:

http://www.redbooks.ibm.com

Understanding SSA Subsystems in Your Environment , SG24-5750-00

Once you have found out the type of SSA adapter you have i.e.:

4-P download the relevant manual from:

http://www.hursley.ibm.com/~ssa/docs/index.html#rs6k

HTH

Cheers

PSD
HAMCP Specialist

 

[carine]

You first have to check that the state of the hdisk's is "NONE" and that they aren't associated with a volume group.

* you have to declare the disks you want to be RAID5 disks as candidat : smit -> Devices -> SSA RAID Arrays -> Change Use of Multiple SSA Physical Disks,
choose a SSA adapter (Example : ssa0, select the disks with F7 (pdisk0,pdisk1,...) and in front of "New Use" select "Array Candidate Disks"

* To create the RAID5 array :
smit -> Devices -> SSA RAID Array -> Add an SSA RAID array
choose a ssa adapter, the type of RAID Array, put the name of the disks which are candidate, Unable Use of Hot Spares, etc...

That are the only things I have find about in the documents I have and I have never implement RAID5.
I hope it will help you but if not I haven't any other information.
Carine

 

[teddy74]

Thanks Paul and Carine , your information is very valuable , shall get in touch incase i have further queries.
regards,
Rajesh

|-0
rajeshrcmc@hotmail.com
"Better to ask a question once and be thought a fool once, than never to ask and remain a fool forever"

 

[PSD]

Rajesh,

Drop me a mail if you have any major problems :

psharped@csc.com

Cheers

PSD
HACMP Specialist