rx3600 integrated raid

[Jimmy Borrero]

We have a rx3600 with an internal raid controller in which two 36GB drives are mirrored by the controller.
We want to add two more 36Gb drives to the existing raid and vg configuration.

1. Do we add them via the controller? if so, is this process requires downtime or can it be done online? not to familiar with the "sasmgr"
2. Or just simply plug them in and vgextend? if so, how this affects the mirroring form the controller?

# sasmgr get_info -D /dev/sasd0 -q phy=all

Fri Sep 24 11:33:14 2010

Info for PHY ID : 0
PHY Health : DOWN
Port SAS Address : 0x0
Attached SAS Address : 0x0
Current Link Rate : 1.5 Gbps
Max Link Rate : 1.5 Gbps

Info for PHY ID : 1
PHY Health : DOWN
Port SAS Address : 0x0
Attached SAS Address : 0x0
Current Link Rate : 1.5 Gbps
Max Link Rate : 1.5 Gbps

Info for PHY ID : 2
PHY Health : DOWN
Port SAS Address : 0x0
Attached SAS Address : 0x0
Current Link Rate : 1.5 Gbps
Max Link Rate : 1.5 Gbps

Info for PHY ID : 3
PHY Health : DOWN
Port SAS Address : 0x0
Attached SAS Address : 0x0
Current Link Rate : 1.5 Gbps
Max Link Rate : 1.5 Gbps

Info for PHY ID : 4
PHY Health : UP
Port SAS Address : 0x500605b0008eb3e4
Attached SAS Address : 0x500000e01aa86d22
Current Link Rate : 3 Gbps
Max Link Rate : 3 Gbps

Info for PHY ID : 5
PHY Health : UP
Port SAS Address : 0x500605b0008eb3e5
Attached SAS Address : 0x500000e01aa63392
Current Link Rate : 3 Gbps
Max Link Rate : 3 Gbps

Info for PHY ID : 6
PHY Health : DOWN
Port SAS Address : 0x0
Attached SAS Address : 0x0
Current Link Rate : 1.5 Gbps
Max Link Rate : 1.5 Gbps

Info for PHY ID : 7
PHY Health : DOWN
Port SAS Address : 0x0
Attached SAS Address : 0x0
Current Link Rate : 1.5 Gbps
Max Link Rate : 1.5 Gbps

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


Fri Sep 24 11:33:38 2010

---------- LOGICAL DRIVE 7 ----------

Raid Level : RAID 1
Volume sas address : 0xf217d3a3e38b802
Device Special File : /dev/rdsk/c0t0d0
Raid State : OPTIMAL
Raid Status Flag : ENABLED
Raid Size : 34558
Rebuild Rate : 0.00 %
Rebuild Progress : 100.00 %

Participating Physical Drive(s) :

SAS Address Enc Bay Size(MB) Type State

0x500000e01aa63392 1 7 34732 SECONDARY ONLINE
0x500000e01aa86d22 1 8 34732 PRIMARY ONLINE


# sudo ioscan -fnkd sasd
Class I H/W Path Driver S/W State H/W Type Description
====================================================================
escsi_ctlr 0 0/4/1/0 sasd CLAIMED INTERFACE HP PCI/PCI-X SAS MPT Adapter
/dev/sasd0


# ioscan -fnC disk
Password:
Class I H/W Path Driver S/W State H/W Type Description
===============================================================================
disk 3 0/0/2/1.0.16 UsbScsiAdaptor CLAIMED DEVICE USB SCSI Stack Adaptor
disk 0 0/4/1/0.0.0.0.0 sdisk CLAIMED DEVICE HP IR Volume
/dev/dsk/c0t0d0 /dev/dsk/c0t0d0s3 /dev/rdsk/c0t0d0s2
/dev/dsk/c0t0d0s1 /dev/rdsk/c0t0d0 /dev/rdsk/c0t0d0s3
/dev/dsk/c0t0d0s2 /dev/rdsk/c0t0d0s1

thx in advance

jimmy

[Bulent ILIMAN]

You can not access the disks behind a RAID card you at least add the drives as JBOD,

but best way is to create a new RAID Volume from your new drives and extend the VG with your new volume,

you can see the document on
http://docs.hp.com/en/5900-0112/5900-0112.pdf

[Jimmy Borrero]

thanks for the response..
So I can't add the new drives to the existing configuration unless a recreate it?
If I add the drives like you recommend I would end up with two Raid 1 within the same VG. How does the mirror handles a disk failure?
I found this command:
sasmgr add -D /dev/sasd0 -q raid -q level=1 -q size=34000 -q enc_bay=1:5,1:6
would this work?

[Bulent ILIMAN · Accepted solution]

because you have created your new drive with Raid protection, you dont need to care about the mirror protection in the OS level

your command seem to work

just add the new drive to vg with vgextend and then use lvextend or create new lv's with lvcreate

[Jimmy Borrero]

thanks for your help.

[Jimmy Borrero]

i'll try what was sugessted, thx