Chaning RAID Configuration with PERC4/DC?

Irwan Hadi ihblist at gmail.com
Sat Apr 1 01:27:58 CST 2006


Forgot to add, as long as you don't initialize the new RAID 5 virtual
disk/volume you just created, the data will be there.
Of course you will need to update the /etc/fstab, because this may
change your disk alias (eg: from /dev/hdf to /dev/hdd)

On 4/1/06, Irwan Hadi <ihblist at gmail.com> wrote:
> As long as you take a note of the current RAID 5 volume configuration
> at PERC BIOS (which disks belong to this volume and stripe size), you
> should be able to clear configuration, and recreate a new
> configuration for that RAID 5 volume, with the data intact.
>
> Of course you should backup everything first in that RAID 5, just in case.
>
> On 3/31/06, John Jung <john.jung at ugs.com> wrote:
> > Hi,
> >
> >    I have a PE750 running SLES 9.2 with a PERC4/DC that has about 10 SCSI
> > disks hooked up.  The disks are in a variety of RAID 0's and one RAID 5
> > configurations (don't ask).  I want to turn the RAID 0's into new RAID 5's
> > while keeping the existing RAID 5.
> >
> >    Right now, I have logical drives 0-4 and 6 as RAID 0's, while logical
> > drive 5 is the RAID 5.  The PERC4/DC BIOS has no obvious way of deleting just
> > one logical drive.  Can I go into the PERC4/DC BIOS and wipe the existing
> > configuration, create the new RAID 5's and re-create the existing RAID 5?
> > Will the data in my existing RAID 5 be safe?
> >
> >    Additionally, in SLES, I have three LVM's setup (one for one group of RAID
> > 0's, one for another group of RAID 0's, and a third for the RAID 5's).  How
> > will Linux see the modified configuration?  Will it see that the old RAID 5
> > (LD5) has switched to a new logical drive (say LD3) and re-mount it correctly?
> >
> >    I don't have OMSA loaded because I can't seem to get the pre-reqs loaded.
> >
> >    Thanks in advance for any insight you can provide.
> >
> >                                                 John
> >
> > --
> > +-------------------------------------+-------------------------------------+
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> > |  Global Technical Access Center     |   10824 Hope Street, MS: 1177       |
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> > +------------------------------(800) 955-0000-------------------------------+
> >
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