Re: Question about hiding disks from smit
From: Ford, Phillip (phillip.ford_at_SPCORP.COM)
Date: 08/26/05
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Date: Fri, 26 Aug 2005 15:33:14 -0400 To: aix-l@Princeton.EDU
No problem. I have not either and that is why I am worried. I can just see
myself at 2:00 am one morning and the DBA is saying they are running out of
space - I go in and grab the first free disk and give it to a volume group
and crash Oracle. How do you spell recovery. I do not like the situation.
These disks were part of a volume group before so they may have pv
information on them. When I do a lspv it says that the disk is not assigned
to a volume group. The DBAs have not loaded the Oracle yet so I do not know
what happens when Oracle start using it. May be there is no problem but my
guess is the system will not know that oracle is using it and will think it
is a free disk. Thanks anyway.
-- Phillip 320-4462 -----Original Message----- From: Bob Booth - CITES [mailto:booth@UIUC.EDU] Sent: Friday, August 26, 2005 1:50 PM To: aix-l@Princeton.EDU Subject: Re: Question about hiding disks from smit On Fri, Aug 26, 2005 at 01:16:52PM -0400, Ford, Phillip wrote: > I have the same problem with TSM. But you missed understood me. I am > not talking about logical volumes. At least with these the drives > (hdiskxx) do not show up in the smit create volume group or extend > volume group. I am talking about drives. We now give drives to > Oracle not logical volumes. Under this when I go to smit create > logical volume I will see disks that are not used and disks that I > have given to Oracle. So now even when I do it I have to look and get > a total list of all drives given to Oracle and not pick one of these > drives to create a new volume group from (or extend a current volume > group). I would rather see a list of actual unused drives and some > how get smit to not list the ones I have give to Oracle. Yes, I totally mis-understood you. I'm terribly sorry, and this is a delemia, since you can't 'name' hdisks. Do you see any garbage in the PVID section when you do a lspv for instance, or do they say 'none'. If they say 'none' that means that Oracle is not messing with the first few bytes of the disk, and you may be able to use the PVID area as 'marker' If you have any spare disks, try making a PV out of one of them, then give it to Oracle. See if Oracle rejects it, or wipes out the old PVID back to zeros. This is kinda bad on Oracle's part, as I can see this as 'all kinds of trouble' on any platform. Jeeze, you would assume that they would block the disk from normal OS access somehow. Sorry for the confusion, I guess I am not used to products being that aggresive with disk management. bob ********************************************************************* This message and any attachments are solely for the intended recipient. If you are not the intended recipient, disclosure, copying, use or distribution of the information included in this message is prohibited -- Please immediately and permanently delete.
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