how to break a disc from a mirror IR volume.

[iormundr]

Hi to all.

Ive installed a new blade 870c with 11.23ia.
and the os is runnig on IR Volume that contains two physical disks.

./sasmgr get_info -D /dev/sasd0 -q raid

how can i break it ???
and using the second disk with out damaging the os .

does someone attempted this before ?

[TTr]

In general with all smartarray controllers you can add disks to a raid group but you can not take disks out (which is what you want to do). This controller is even more restrictivy. BAsed on the quick specs,

http://h18004.www1.hp.com/products/quickspecs/12926_na/12926_na.html

it supports RAID1 only so it appears that you cannot break the mirror.

[iormundr]

so there is not way back from this situation ?
the only way to install os again ?

[Torsten.]

IMHO the only option you have is to *delete* the RAID (including data) and start over using the "plain" disk.

To avoid a new install you may consider to install another new disk in a free slot, mirror the hardware RAID to this disk with LVM mirrordisk and delete the RAID after this. You can also take an ignite backup, delete the RAID and restore the image.

[Suraj K Sankari]

Hi,
Please read this guide to begin:

http://docs.hp.com/en/5991-1236/When_Good_Disks_Go_Bad.pdf

Suraj

[TTr]

> so there is not way back from this situation

As I said before, based on the quick specs this RAID controller ONLY supports RAID1 so it appears that you can not set up a single disk or a "plain" disk.
Feel free to try it and let us know if it a single disk will work as RAID0 on this controller.

[Torsten.]

The controller can do both, a RAID or handle "plain" disks, example:

RAID

escsi_ctlr 0 0/2/1/0 sasd CLAIMED INTERFACE HP PC
I/PCI-X SAS MPT Adapter
/dev/sasd0
ext_bus 3 0/2/1/0.0.0 sasd_vbus CLAIMED INTERFACE SAS De
vice Interface
target 5 0/2/1/0.0.0.0 tgt CLAIMED DEVICE
disk 2 0/2/1/0.0.0.0.0 sdisk CLAIMED DEVICE
HP IR Volume
/dev/dsk/c3t0d0 /dev/rdsk/c3t0d0
/dev/dsk/c3t0d0s1 /dev/rdsk/c3t0d0s1
/dev/dsk/c3t0d0s2 /dev/rdsk/c3t0d0s2
/dev/dsk/c3t0d0s3 /dev/rdsk/c3t0d0s3


PLAIN DISKS:

escsi_ctlr 0 0/1/1/0 sasd CLAIMED INTERFACE HP PC
I/PCI-X SAS MPT Adapter
/dev/sasd0
ext_bus 2 0/1/1/0.0.0 sasd_vbus CLAIMED INTERFACE SAS De
vice Interface
target 1 0/1/1/0.0.0.0 tgt CLAIMED DEVICE
disk 3 0/1/1/0.0.0.0.0 sdisk CLAIMED DEVICE HP
DH072ABAA6
/dev/dsk/c2t0d0 /dev/rdsk/c2t0d0
/dev/dsk/c2t0d0s1 /dev/rdsk/c2t0d0s1
/dev/dsk/c2t0d0s2 /dev/rdsk/c2t0d0s2
/dev/dsk/c2t0d0s3 /dev/rdsk/c2t0d0s3
target 2 0/1/1/0.0.0.1 tgt CLAIMED DEVICE
disk 2 0/1/1/0.0.0.1.0 sdisk CLAIMED DEVICE HP
DH072ABAA6
/dev/dsk/c2t1d0 /dev/rdsk/c2t1d0



Problem is, you cannot convert without data loss.