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Re: move the oracle db from hp san to new storage

 
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James R. Ferguson
Acclaimed Contributor

Re: move the oracle db from hp san to new storage

Hi:

> if the migration does not work..and i am in the middle of mirroring. what are the steps for fallback or rollback?

Simply 'lvreduce -m 0 ' any logical volume that you don't want.

Regards!

...JRF...
DnD_1
Regular Advisor

Re: move the oracle db from hp san to new storage

thanks james...

only lvreduce that simple :) ?
Steven E. Protter
Exalted Contributor

Re: move the oracle db from hp san to new storage

Shalom,

Few things to watch here.

1.) Have a cold back up before you start.
2.) It might be faster to shut the database down and do an scp -rp or cp -rp between the two disks. This assumes you are not using raw disk.

But it seems you are in progress, too late to change.

I would also want some advice from Oracle on acceptable migration procedures.

SEP
Steven E Protter
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James R. Ferguson
Acclaimed Contributor

Re: move the oracle db from hp san to new storage

Hi (again) DnD:

> only lvreduce that simple :) ?

Yes, the mirror operation is non-destructive and when complete you have two (or more) copies of the same data. As noted by Matti, if you don't have MirrorDisk/UX you might consider using the poor-man's mirror --- 'pvmove'. Be very careful if you ever use this. An interruption in 'pvmove' can leave the logical volume(s) with stale extents in an unusable mode. Using MirrorDisk/UX is safe, quick and painless.

Regards!

...JRF...