原文链接:
http://www.eygle.com/unix/Use.EMC.Powermt.Solve.Config.Problem.htm
在EMC系统中,如果你频繁的增减磁盘,重新分配规划磁盘组,那么主机可能无法正确检测到磁盘,这是后我们可以使用powermt来检测配置,
解决问题.
1.你可以会遇到如下问题
你已经分配磁盘给主机系统,但是在format时无法发现:
# format
Searching for disks...done
AVAILABLE DISK SELECTIONS:
0. c1t0d0
/pci@9,600000/SUNW,qlc@2/fp@0,0/ssd@w500000e0106d9781,0
1. c1t1d0
/pci@9,600000/SUNW,qlc@2/fp@0,0/ssd@w500000e0106ef871,0
Specify disk (enter its number): 1
selecting c1t1d0
[disk formatted]
Warning: Current Disk has mounted partitions.
FORMAT MENU:
disk - select a disk
type - select (define) a disk type
partition - select (define) a partition table
current - describe the current disk
format - format and analyze the disk
repair - repair a defective sector
label - write label to the disk
analyze - surface analysis
defect - defect list management
backup - search for backup labels
verify - read and display labels
save - save new disk/partition definitions
inquiry - show vendor, product and revision
volname - set 8-character volume name
! - execute , then return
quit
format> q
2.此时可以使用powermt来检测PowerPath连接状态
Powermt means:PowerPath 4.x Management Utility
# powermt display dev=all
Pseudo name=emcpower4a
CLARiiON ID=CK200041200044
Logical device ID=6006016028A610000AF03A428708D911
state=alive; policy=CLAROpt; priority=0; queued-IOs=0
Owner: default=SP B, current=Unknown
==============================================================================
---------------- Host --------------- - Stor - -- I/O Path - -- Stats ---
### HW Path I/O Paths Interf. Mode State Q-IOs Errors
==============================================================================
2304 pci@8/fibre-channel@4 c2t0d3s0 SP B0 active dead 0 0
2304 pci@8/fibre-channel@4 c2t1d3s0 SP A0 active dead 0 0
2305 pci@8/fibre-channel@5 c3t0d3s0 SP B0 active dead 0 0
2305 pci@8/fibre-channel@5 c3t1d3s0 SP A0 active dead 0 0
Pseudo name=emcpower5a
CLARiiON ID=CK200041200044
Logical device ID=6006016028A610005ABD62655B08D911
state=alive; policy=CLAROpt; priority=0; queued-IOs=0
Owner: default=SP A, current=Unknown
==============================================================================
---------------- Host --------------- - Stor - -- I/O Path - -- Stats ---
### HW Path I/O Paths Interf. Mode State Q-IOs Errors
==============================================================================
2304 pci@8/fibre-channel@4 c2t0d2s0 SP B0 active dead 0 0
2304 pci@8/fibre-channel@4 c2t1d2s0 SP A0 active dead 0 0
2305 pci@8/fibre-channel@5 c3t0d2s0 SP B0 active dead 0 0
2305 pci@8/fibre-channel@5 c3t1d2s0 SP A0 active dead 0 0
Pseudo name=emcpower0a
CLARiiON ID=CK200041200044
Logical device ID=6006016028A61000C65024C992D4D811
state=alive; policy=CLAROpt; priority=0; queued-IOs=0
Owner: default=SP B, current=Unknown
==============================================================================
---------------- Host --------------- - Stor - -- I/O Path - -- Stats ---
### HW Path I/O Paths Interf. Mode State Q-IOs Errors
==============================================================================
2304 pci@8/fibre-channel@4 c2t0d0s0 SP B0 active dead 0 0
2304 pci@8/fibre-channel@4 c2t1d0s0 SP A0 active dead 0 0
2305 pci@8/fibre-channel@5 c3t0d0s0 SP B0 active dead 0 0
2305 pci@8/fibre-channel@5 c3t1d0s0 SP A0 active dead 0 0
Pseudo name=emcpower1a
CLARiiON ID=CK200041200044
Logical device ID=6006016028A61000F075BD4E93D4D811
state=alive; policy=CLAROpt; priority=0; queued-IOs=0
Owner: default=SP A, current=Unknown
==============================================================================
---------------- Host --------------- - Stor - -- I/O Path - -- Stats ---
### HW Path I/O Paths Interf. Mode State Q-IOs Errors
==============================================================================
2304 pci@8/fibre-channel@4 c2t0d1s0 SP B0 active dead 0 0
2304 pci@8/fibre-channel@4 c2t1d1s0 SP A0 active dead 0 0
2305 pci@8/fibre-channel@5 c3t0d1s0 SP B0 active dead 0 0
2305 pci@8/fibre-channel@5 c3t1d1s0 SP A0 active dead 0 0
Pseudo name=emcpower6a
CLARiiON ID=CK200041200044
Logical device ID=6006016028A61000FC68E575620CD911
state=alive; policy=CLAROpt; priority=0; queued-IOs=0
Owner: default=SP B, current=Unknown
==============================================================================
---------------- Host --------------- - Stor - -- I/O Path - -- Stats ---
### HW Path I/O Paths Interf. Mode State Q-IOs Errors
==============================================================================
2304 pci@8/fibre-channel@4 c2t0d4s0 SP B0 active dead 0 0
2304 pci@8/fibre-channel@4 c2t1d4s0 SP A0 active dead 0 0
2305 pci@8/fibre-channel@5 c3t0d4s0 SP B0 active dead 0 0
2305 pci@8/fibre-channel@5 c3t1d4s0 SP A0 active dead 0 0
这些active dead的状态都是错误的.
3.执行重新配置
# powermt check
Warning: CLARiiON device path c2t0d0s0 is currently dead.
Do you want to remove it (y/n/a/q)? y
Warning: CLARiiON device path c2t0d1s0 is currently dead.
Do you want to remove it (y/n/a/q)? y
Warning: CLARiiON device path c2t0d2s0 is currently dead.
Do you want to remove it (y/n/a/q)? a
Warning: CLARiiON device path c2t0d3s0 is currently dead.
Warning: CLARiiON device path c2t0d4s0 is currently dead.
Warning: CLARiiON device path c2t1d0s0 is currently dead.
Warning: CLARiiON device path c2t1d1s0 is currently dead.
Warning: CLARiiON device path c2t1d2s0 is currently dead.
Warning: CLARiiON device path c2t1d3s0 is currently dead.
Warning: CLARiiON device path c2t1d4s0 is currently dead.
Warning: CLARiiON device path c3t0d0s0 is currently dead.
Warning: CLARiiON device path c3t0d1s0 is currently dead.
Warning: CLARiiON device path c3t0d2s0 is currently dead.
Warning: CLARiiON device path c3t0d3s0 is currently dead.
Warning: CLARiiON device path c3t0d4s0 is currently dead.
Warning: CLARiiON device path c3t1d0s0 is currently dead.
Warning: CLARiiON device path c3t1d1s0 is currently dead.
Warning: CLARiiON device path c3t1d2s0 is currently dead.
Warning: CLARiiON device path c3t1d3s0 is currently dead.
Warning: CLARiiON device path c3t1d4s0 is currently dead.
# powermt config
# powermt restore
# powermt save
# powermt display dev=all
Pseudo name=emcpower7a
CLARiiON ID=CK200041200044 [Storage Group 2]
Logical device ID=6006016028A61000482F2BA9720CD911 [LUN 1]
state=alive; policy=CLAROpt; priority=0; queued-IOs=0
Owner: default=SP B, current=SP B
==============================================================================
---------------- Host --------------- - Stor - -- I/O Path - -- Stats ---
### HW Path I/O Paths Interf. Mode State Q-IOs Errors
==============================================================================
2304 pci@8/fibre-channel@4 c2t0d0s0 SP B0 active alive 0 0
2304 pci@8/fibre-channel@4 c2t1d0s0 SP A0 active alive 0 0
2305 pci@8/fibre-channel@5 c3t0d0s0 SP B0 active alive 0 0
2305 pci@8/fibre-channel@5 c3t1d0s0 SP A0 active alive 0 0
此时的active alive状态正常.
4.此时执行format可以看到正确的磁盘
# format
Searching for disks...done
c2t0d0: configured with capacity of 40.00GB
c2t1d0: configured with capacity of 40.00GB
c3t0d0: configured with capacity of 40.00GB
c3t1d0: configured with capacity of 40.00GB
emcpower7a: configured with capacity of 40.00GB
AVAILABLE DISK SELECTIONS:
0. c1t0d0
/pci@9,600000/SUNW,qlc@2/fp@0,0/ssd@w500000e0106d9781,0
1. c1t1d0
/pci@9,600000/SUNW,qlc@2/fp@0,0/ssd@w500000e0106ef871,0
2. c2t0d0
/pci@8,700000/fibre-channel@4/sd@0,0
3. c2t1d0
/pci@8,700000/fibre-channel@4/sd@1,0
4. c3t0d0
/pci@8,700000/fibre-channel@5/sd@0,0
5. c3t1d0
/pci@8,700000/fibre-channel@5/sd@1,0
6. emcpower7a
/pseudo/emcp@7
Specify disk (enter its number): ^D
具体Powermt命令参考: