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how to config STMS with ALUA feature in solaris10

Publication Date:  2012-11-28 Views:  112 Downloads:  0
Issue Description
in order to provide path redundancy between host and storage array, multipath management is necessary,the article try to show the configuration processes of STMS with ALUA feature

STMS is bulit-in software in solaris10,you do not have to install it seperately

ALUA feature can decrease LUN swith beteen two storage processor, and improve system availability, so it suggests to enable ALUA feature

Alarm Information
Handling Process
step 1
enable ALUA function in S2600T side in ISM->initiator management

step 2
scan LUN in host side with command cfgadm,make sure all LUN is attached to the host

bash-3.2# cfgadm -al
Ap_Id Type Receptacle Occupant Condition
c0 scsi-bus connected configured unknown
c0::dsk/c0t0d0 CD-ROM connected configured unknown
c1 scsi-sata connected configured unknown
c1::dsk/c1t0d0 disk connected configured unknown
c1::dsk/c1t1d0 disk connected configured unknown
c1::dsk/c1t2d0 disk connected configured unknown
c1::dsk/c1t3d0 disk connected configured unknown
c7 fc-private connected configured unknown
c7::2013323232323232 disk connected configured unknown
c8 fc-private connected configured unknown
c8::2003323232323232 disk connected configured unknown

step 3 enable STMS function in host side

bash-3.2# stmsboot -D fp -e
WARNING: This operation will require a reboot.
Do you want to continue ? [y/n] (default: y) y
The changes will come into effect after rebooting the system.
Reboot the system now ? [y/n] (default: y) y
updating /platform/sun4u/boot_archive

step 4 after rebooting host system, multipath become available, and new persudo disk devices are created as multipath device

bash-3.2# format
Searching for disks...done
0. c1t0d0 <FUJITSU-MAY2073RCSUN72G-0501 cyl 14087 alt 2 hd 24 sec 424>
1. c1t1d0 <FUJITSU-MAY2073RCSUN72G-0501 cyl 14087 alt 2 hd 24 sec 424>
2. c1t2d0 <SUN72G cyl 14087 alt 2 hd 24 sec 424>
3. c1t3d0 <FUJITSU-MAY2073RCSUN72G-0501 cyl 14087 alt 2 hd 24 sec 424>
4. c2t632323210032323206B0E17A00000005d0 <HUAWEI-S2600T-2102 cyl 4367 alt 2 hd
30 sec 64>
5. c2t63232321003232320516B53500000004d0 <HUAWEI-S2600T-2102 cyl 10920 alt 2 hd
30 sec 64>
Specify disk (enter its number):

step 5 you can start using these device directly as raw device or as block device, even managed by volume management software SVM

Root Cause
configuration of solaris multipath feature varied with version,you should refer to solaris management guide before deploying STMS