Originally posted by: SystemAdmin

We just set up a new IBM p5 520 with 6 disks to run AIX 5.3 (hdisk0-hdisk5). The system is up, patches applied, security hardened, users created, have the base rootvg on hdisk0 and now it's time to install Oracle.

We intend to use one of the disks to extend the file system for the Oracle Base to install into and add a page space to conform to the pre-installation checklist, We DO want to use ASM so the remaining 4 disks will be for ASM disk group(s).

and our question is:

Do we just hand over the disks (hdisk(n)) to the Oracle installer to create ASM disk group(s)? Do we need to do anything in the LVM? Do we need to create LV's and hand THOSE over to the installer? I am sensing that we DO NOT want to go in and start mirroring and striping in the LVM...is there anything out there as to "best practices" for ASM on AIX specifically?
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Originally posted by: orphy

Try this "Implementing Oracle 10g RAC with ASM on AIX".

http://www-03.ibm.com/support/techdocs/atsmastr.nsf/5cb5ed706d254a8186256c71006d2e0a/f939ff19b6430df7862570e5005027dc/$FILE/10gRAC_ASM.pdf
Orphy
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Originally posted by: SystemAdmin

Thanks for the quick reply...that was an excellent reference; even though we are not implementing RAC; the ASM and the AIX tuning sections were VERY informative.

My plan is to hand over the rhdisk(n) not hdisk(n) respectively (for character not block) to ASM and avoid the LVM altogether.
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Originally posted by: orphy

If you are going to do ASM, hang over the disks and don't worry about LVM. When RDBMS deals with disks directly (bypassing volume manager), they typically deal with the raw devices. You can't just hand over the char devs but not the block devs. They are the same disks with the same exact data written to them. The only diff is really just how they are accessed.
Orphy
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