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swap 2*73GB SAS disks to 2*146GB disks in BL860C

xiaobing wu
Occasional Visitor

swap 2*73GB SAS disks to 2*146GB disks in BL860C

Hi,

I have a BL860C with 2*73 SAS disk, hardware raid 1.

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

Tue Jan 6 11:47:44 2009

---------- LOGICAL DRIVE 1 ----------

Raid Level : RAID 1
Volume sas address : 0x4f56ebcd40411c2
Device Special File : /dev/rdsk/c0t0d0
Raid State : OPTIMAL
Raid Status Flag : ENABLED
Raid Size : 69878
Rebuild Rate : 0.00 %
Rebuild Progress : 100.00 %

Participating Physical Drive(s) :

SAS Address Enc Bay Size(MB) Type State

0x500000e0182d5fc2 1 2 70007 SECONDARY ONLINE
0x500000e0182ce172 1 1 70007 PRIMARY ONLINE

we want to change to 2*146GB sas disks since 73GB is not enough.
there is hpux 11.31 and oracle DBs on the 73GB disks so I want to migrate the data instead of reinstallation.

I wonder if I can do it as follows:
1. split the hardware raid1, relpace one 73GB sas disk with one 146GB disk,
2. after resync, replace the other 73GB disk with another 146GB disk.

I doubt whether I can get 146GB usable space(raid 1) through above steps, or still 73GB?

Can anybody help confirm or provide other solutions?

many thanks!

xiaobing wu
2 REPLIES
utopiazz
Occasional Advisor

Re: swap 2*73GB SAS disks to 2*146GB disks in BL860C

I'm not 100% (but close) sure about this.

You shouldn't have to split the drives at all. Just remove one of the 72GB disks and insert the new 146GB disk. After the Array controller has resynced you can replace the other disk.

When both disks have been changed you use Smart Array configuration manager and either expand Array 1 or create a new Array 2 with the remaining disk space

At least this works on Windows servers, could be different in *nix operating systems.

/J
kris rombauts
Honored Contributor

Re: swap 2*73GB SAS disks to 2*146GB disks in BL860C

Hi,

the build in controller is not a SmartArray controller and is not able to handle array and logical drive expansion.

You can remove one 73 GB disk and rebuild onto a 146 GB disk and the do the same again with the remaining drive after the rebuild is finished, however you will end up with a RAID1 array of 73 GB and there is no possibility to create a second logical drive in the unused space....

See drvcfg output below, this is taken from EFI shell so it is independent of the OS that runs on the blade server.

--------------------------------------------
LSI Logic MPT Setup Utility (2006.11.1) 2.01.04.00
View Array -- SAS1068
Array 1 of 1
Identifier HP IR Volume HP01
Type IM
Scan Order 1
Size(MB) 69618
Status Optimal




Slot Device Identifier RAID Hot Drive Pred Size
Num Disk Spr Status Fail (MB)
1 HP DH072ABAA6 HPD4 Yes No Primary No 69618
2 HP DG072ABAB3 HPD7 Yes No Secondary No 69618




=> after both disks are replaced by 146 GB disks:

LSI Logic MPT Setup Utility (2006.11.1) 2.01.04.00
| View Array -- SAS1068
| Array 1 of 1
| Identifier HP IR Volume HP01
| Type IM
| Scan Order 1
| Size(MB) 69618
| Status Optimal
|
| Manage Array
|
| Slot Device Identifier RAID Hot Drive Pred Size
| Num Disk Spr Status Fail (MB)
| 1 HP DG146BB976 HPDC Yes No Secondary No 69618
| 2 HP DG146ABAB4 HPD5 Yes No Primary No 69618
|



HTH

Kris