Re: Stopping and restarting RAID 5 on a RAID set in the system ASP

["Charles Wilt" <charles.wilt@xxxxxxxxx>]

Kirk,

Does it make a difference if you stopping/starting RAID for an IOP vs.
a set of disks?

The Backup and Recovery manual seems to imply that RAID is
started/stopped for everything on a given IOP.

While the infocenter seems to imply that you can start/stop RAID for a
given set of disks.


Thanks!
Charles

On Thu, Aug 21, 2008 at 1:33 PM, Kirk Goins <kgoins@xxxxxxxxxxx> wrote:
> Charles Wilt wrote:
> > All,
> >
> > We initially had a 3-disk RAID 5 set in our system pool.  We've since
> > added another disk to the RAID set, however parity information is
> > still only being placed on two disks.
> >
> > If we stop device parity protection, and then restart it, the system
> > will spread the parity out across all 4 disks correct?
> >
> > Now, can we do the stop and start while the system is up?  iSeries
> > Navigator's online help says "If you want to stop device parity
> > protection for an independent disk pool that is unavailable, you can
> > do so when your system is fully restarted. For all other disk pools,
> > you will need to restart your system to DST before stopping device
> > parity protection. See Performing actions in DST for information on
> > how to access your server at DST using iSeries Navigator."
> >
> > But the infocenter makes no mention of this requirement.
> >
> > We're on v5r4 LPAR on an 820.
> >
> > Thanks!
> > Charles Wilt
> You will need to stop raid from DST with the system down. When you start
> it again it will see '4' drives and build parity across all '4' drives.
> Make sure you know your SST/DST ID and Password before you get to DST.
>
>
>
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