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After VIS takes over storage array, the disk sequence in SUN Cluster is different with before.

Publication Date:  2012-10-09 Views:  57 Downloads:  0
Issue Description
1. After VIS takes over storage array, check disk information with format in Solaris:
# format
Searching for disks...done
AVAILABLE DISK SELECTIONS:
0. c1t0d0 <SUN72G cyl 14087 alt 2 hd 24 sec 424>
/pci@1f,700000/scsi@2/sd@0,0
1. c1t1d0 <SUN72G cyl 14087 alt 2 hd 24 sec 424>
/pci@1f,700000/scsi@2/sd@1,0
2. c1t2d0 <SUN72G cyl 14087 alt 2 hd 24 sec 424>
/pci@1f,700000/scsi@2/sd@2,0
3. c1t3d0 <SUN72G cyl 14087 alt 2 hd 24 sec 424>
/pci@1f,700000/scsi@2/sd@3,0
4. c3t40d0 (SUN-StorEdge3510-415F cyl 65533 alt 2 hd 64 sec 292)
/pci@1c,600000/SUNW,qlc@1/fp@0,0/ssd@w216000c0ff8a7498,0
5. c3t40d1 (SUN-StorEdge3510-415F cyl 47341 alt 2 hd 64 sec 255)
/pci@1c,600000/SUNW,qlc@1/fp@0,0/ssd@w216000c0ff8a7498,1
6. c3t40d2 (SUN-StorEdge3510-415F cyl 998 alt 2 hd 64 sec 32)
/pci@1c,600000/SUNW,qlc@1/fp@0,0/ssd@w216000c0ff8a7498,2

The storage array disks are from the 4th to 6th which sizes are 583GB, 325GB and 1GB separately. 

Check SUN Cluster DID device:
# scdidadm -l
1 DB-1:/dev/rdsk/c0t0d0 /dev/did/rdsk/d1
2 DB-1:/dev/rdsk/c1t0d0 /dev/did/rdsk/d2
3 DB-1:/dev/rdsk/c1t1d0 /dev/did/rdsk/d3
4 DB-1:/dev/rdsk/c1t2d0 /dev/did/rdsk/d4
5 DB-1:/dev/rdsk/c1t3d0 /dev/did/rdsk/d5
6 DB-1:/dev/rdsk/c3t40d2 /dev/did/rdsk/d6
7 DB-1:/dev/rdsk/c3t40d1 /dev/did/rdsk/d7
8 DB-1:/dev/rdsk/c3t40d0 /dev/did/rdsk/d8

2. After VIS taking over, check disk with format:
# format
Searching for disks...done
AVAILABLE DISK SELECTIONS:
0. c1t0d0 <SUN72G cyl 14087 alt 2 hd 24 sec 424>
/pci@1f,700000/scsi@2/sd@0,0
1. c1t1d0 <SUN72G cyl 14087 alt 2 hd 24 sec 424>
/pci@1f,700000/scsi@2/sd@1,0
2. c1t2d0 <SUN72G cyl 14087 alt 2 hd 24 sec 424>
/pci@1f,700000/scsi@2/sd@2,0
3. c1t3d0 <SUN72G cyl 14087 alt 2 hd 24 sec 424>
/pci@1f,700000/scsi@2/sd@3,0
4. c3t22040022A100D40Ad0 (SUN-StorEdge3510-415F cyl 998 alt 2 hd 64 sec 32)
/pci@1c,600000/SUNW,qlc@1/fp@0,0/ssd@w22040022a100d40a,2
5. c3t22040022A100D40Ad1 (SUN-StorEdge3510-415F cyl 47341 alt 2 hd 64 sec 255)
/pci@1c,600000/SUNW,qlc@1/fp@0,0/ssd@w22040022a100d40a,1
6. c3t22040022A100D40Ad2 (SUN-StorEdge3510-415F cyl 65533 alt 2 hd 64 sec 292)
/pci@1c,600000/SUNW,qlc@1/fp@0,0/ssd@w22040022a100d40a,0

The disk sequence from 4th to 6th is different with before and its sizes are 1G, 325G and 583G separately. 
Check SUN Cluster DID device:
scdidadm -l
1 DB-1:/dev/rdsk/c0t0d0 /dev/did/rdsk/d1
2 DB-1:/dev/rdsk/c1t0d0 /dev/did/rdsk/d2
3 DB-1:/dev/rdsk/c1t1d0 /dev/did/rdsk/d3
4 DB-1:/dev/rdsk/c1t2d0 /dev/did/rdsk/d4
5 DB-1:/dev/rdsk/c1t3d0 /dev/did/rdsk/d5
6 DB-1:/dev/rdsk/c4t22010022A100D40Ad0 /dev/did/rdsk/d6
6 DB-1:/dev/rdsk/c4t22110022A100D40Ad0 /dev/did/rdsk/d6
7 DB-1:/dev/rdsk/c4t22010022A100D40Ad1 /dev/did/rdsk/d7
7 DB-1:/dev/rdsk/c4t22110022A100D40Ad1 /dev/did/rdsk/d7
8 DB-1:/dev/rdsk/c4t22010022A100D40Ad2 /dev/did/rdsk/d8
8 DB-1:/dev/rdsk/c4t22110022A100D40Ad2 /dev/did/rdsk/d8

The disks corresponding with D6 to D8 are not equal with before. SUN host will access DID device, so SUN host and other configuration files should be modified.
Alarm Information
Null
Handling Process
Remapping LUN to SUN host in VIS, and the mapping volume ID should keep pace with pervious host sequence.
The disk which size is 583G selects mapping volume ID 0.
The disk which size is 325G selects mapping volume ID 1.
The disk which size is 1G selects mapping volume ID 2.
After mapping, check is with command format in SUN host:
# format
Searching for disks...done
AVAILABLE DISK SELECTIONS:
0. c1t0d0 <SUN72G cyl 14087 alt 2 hd 24 sec 424>
/pci@1f,700000/scsi@2/sd@0,0
1. c1t1d0 <SUN72G cyl 14087 alt 2 hd 24 sec 424>
/pci@1f,700000/scsi@2/sd@1,0
2. c1t2d0 <SUN72G cyl 14087 alt 2 hd 24 sec 424>
/pci@1f,700000/scsi@2/sd@2,0
3. c1t3d0 <SUN72G cyl 14087 alt 2 hd 24 sec 424>
/pci@1f,700000/scsi@2/sd@3,0
4. c3t22040022A100D40Ad0 (SUN-StorEdge3510-415F cyl 65533 alt 2 hd 64 sec 292)
/pci@1c,600000/SUNW,qlc@1/fp@0,0/ssd@w22040022a100d40a,0
5. c3t22040022A100D40Ad1 (SUN-StorEdge3510-415F cyl 47341 alt 2 hd 64 sec 255)
/pci@1c,600000/SUNW,qlc@1/fp@0,0/ssd@w22040022a100d40a,1
6. c3t22040022A100D40Ad2 (SUN-StorEdge3510-415F cyl 998 alt 2 hd 64 sec 32)
/pci@1c,600000/SUNW,qlc@1/fp@0,0/ssd@w22040022a100d40a,2
The disk sequence from 4th to 6th is equal with before. 
查看SUN CLUSTER的DID设备:
Check SUN Cluster DID device:
#scdidadm -l
1 DB-1:/dev/rdsk/c0t0d0 /dev/did/rdsk/d1
2 DB-1:/dev/rdsk/c1t0d0 /dev/did/rdsk/d2
3 DB-1:/dev/rdsk/c1t1d0 /dev/did/rdsk/d3
4 DB-1:/dev/rdsk/c1t2d0 /dev/did/rdsk/d4
5 DB-1:/dev/rdsk/c1t3d0 /dev/did/rdsk/d5
6 DB-1:/dev/rdsk/c4t22010022A100D40Ad2 /dev/did/rdsk/d6
6 DB-1:/dev/rdsk/c4t22110022A100D40Ad2 /dev/did/rdsk/d6
7 DB-1:/dev/rdsk/c4t22010022A100D40Ad1 /dev/did/rdsk/d7
7 DB-1:/dev/rdsk/c4t22110022A100D40Ad1 /dev/did/rdsk/d7
8 DB-1:/dev/rdsk/c4t22010022A100D40Ad0 /dev/did/rdsk/d8
8 DB-1:/dev/rdsk/c4t22110022A100D40Ad0 /dev/did/rdsk/d8
The disks corresponding with D6 to D8 are equal with before. No operations are used in SUN host.
Root Cause
When VIS taking over storage array and 3 disks mapping to host, the sequence of selecting host mapping volume should be equal with that before taking over. 
Suggestions
After taking over storage array, check the sequence of disk mapping LUN.
When taking over storage array, host mapping volume ID should be equal with before.

END