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Mirror boot disk !

study unix
Regular Advisor

Mirror boot disk !

Hi All,
Plan to do one mirror for boot disk,
but ioscan found it is IR vloume, but lvlnboot -v only show one disk, and I use command sasmgr to check IR volume found disk /dev/rdsk/c35t0d0,/dev/rdsk/c35t1d0,
if it means they are pair for IR volume?
I post some command for your reference, thanks!

# sasmgr get_info -D /dev/sasd1 -q raid

Fri Jan 14 13:29:58 2011

---------- LOGICAL DRIVE 3 ----------

Raid Level : RAID 1
Volume sas address : 0xf4b2654a91081e4
Device Special File : /dev/rdsk/c35t0d0
Raid State : OPTIMAL
Raid Status Flag : ENABLED
Raid Size : 69618
Rebuild Rate : 0.00 %
Rebuild Progress : 100.00 %

Participating Physical Drive(s) :

SAS Address Enc Bay Size(MB) Type State

0x5000cca0002672e1 1 5 70007 SECONDARY ONLINE
0x5000cca0002535bd 1 3 70007 PRIMARY ONLINE

---------- LOGICAL DRIVE 4 ----------

Raid Level : RAID 1
Volume sas address : 0xc7765d5ea7cc165
Device Special File : /dev/rdsk/c35t1d0
Raid State : OPTIMAL
Raid Status Flag : ENABLED
Raid Size : 69618
Rebuild Rate : 0.00 %
Rebuild Progress : 100.00 %

Participating Physical Drive(s) :

SAS Address Enc Bay Size(MB) Type State

0x5000c5000a6f284d 1 2 70007 SECONDARY ONLINE
0x5000c5000a6ec155 1 1 70007 PRIMARY ONLINE


# lvlnboot -v
Boot Definitions for Volume Group /dev/vg00:
Physical Volumes belonging in Root Volume Group:
/dev/disk/disk50_p2 -- Boot Disk
Boot: lvol1 on: /dev/disk/disk50_p2
Root: lvol3 on: /dev/disk/disk50_p2
Swap: lvol2 on: /dev/disk/disk50_p2
Dump: lvol2 on: /dev/disk/disk50_p2, 0

# ioscan -fnC disk




Class I H/W Path Driver S/W State H/W Type Description
=====================================================================
disk 56 0/2/1/0.4.9.0.0.0.1 sdisk CLAIMED DEVICE HP HSV300
/dev/dsk/c51t0d1 /dev/dsk/c51t0d1s1 /dev/rdsk/c51t0d1 /dev/rdsk/c51t0d1s1
disk 61 0/2/1/0.4.12.0.0.0.1 sdisk CLAIMED DEVICE HP HSV210
/dev/dsk/c57t0d1 /dev/rdsk/c57t0d1
disk 62 0/2/1/0.4.12.0.0.0.3 sdisk CLAIMED DEVICE HP HSV210
/dev/dsk/c57t0d3 /dev/rdsk/c57t0d3
disk 63 0/2/1/0.4.12.0.0.0.4 sdisk CLAIMED DEVICE HP HSV210
/dev/dsk/c57t0d4 /dev/rdsk/c57t0d4
disk 58 0/2/1/0.4.15.0.0.0.1 sdisk CLAIMED DEVICE HP HSV210
/dev/dsk/c55t0d1 /dev/rdsk/c55t0d1
disk 59 0/2/1/0.4.15.0.0.0.3 sdisk CLAIMED DEVICE HP HSV210
/dev/dsk/c55t0d3 /dev/rdsk/c55t0d3
disk 60 0/2/1/0.4.15.0.0.0.4 sdisk CLAIMED DEVICE HP HSV210
/dev/dsk/c55t0d4 /dev/rdsk/c55t0d4
disk 55 0/2/1/0.5.22.255.14.15.0 sdisk CLAIMED DEVICE HP P2000G3 FC/iSCSI
/dev/dsk/c42t15d0 /dev/rdsk/c42t15d0
disk 57 0/2/1/0.5.27.0.0.0.1 sdisk CLAIMED DEVICE HP HSV300
/dev/dsk/c53t0d1 /dev/dsk/c53t0d1s1 /dev/rdsk/c53t0d1 /dev/rdsk/c53t0d1s1
disk 35 0/4/1/0.0.0.0.0 sdisk CLAIMED DEVICE HP IR Volume
/dev/dsk/c35t0d0 /dev/dsk/c35t0d0s2 /dev/rdsk/c35t0d0 /dev/rdsk/c35t0d0s2
/dev/dsk/c35t0d0s1 /dev/dsk/c35t0d0s3 /dev/rdsk/c35t0d0s1 /dev/rdsk/c35t0d0s3
disk 53 0/4/1/0.0.0.1.0 sdisk CLAIMED DEVICE HP IR Volume
/dev/dsk/c35t1d0 /dev/rdsk/c35t1d0
disk 51 255/1/0.0.0 sdisk CLAIMED DEVICE _NEC DVD+-RW ND-6650A
/dev/dsk/c36t0d0 /dev/rdsk/c36t0d0
3 REPLIES
Torsten.
Acclaimed Contributor

Re: Mirror boot disk !

>> but ioscan found it is IR vloume,



This means "Integrated RAID" - it is already a (hardware) mirror.


Disks are in slot 3/5 and 1/2.



As you can see you already have 2 pairs of mirrored disks, no need to mirror them by LVM.

Hope this helps!
Regards
Torsten.

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mrmo07
Regular Advisor

Re: Mirror boot disk !

Hi,

even you don't need to do,find the attach file to see the procedure..

Regards,
Morshed.
sarfaraj ahmad
Trusted Contributor

Re: Mirror boot disk !

Yes. Torsen is absolutely correct.

There is IR Volumes. IR = integrated RAID (mirror), built on the internal SAS controller. shown in sasmgr command.
So there is no need to mirror them again in OS.