Use EMC powermt to solve PowerPath Problem

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iOS FP Unix Blog

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 <sun72g cyl alt hd sec>
          /pci@9,600000/SUNW,qlc@2/fp@0,0/ssd@w500000e0106d9781,0
       1. c1t1d0 <sun72g cyl alt hd sec>
          /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
        !<cmd>     - execute <cmd>, then return
        quit
format&gt; q       
                      </cmd></cmd></sun72g></sun72g>

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 <sun72g cyl alt hd sec>
          /pci@9,600000/SUNW,qlc@2/fp@0,0/ssd@w500000e0106d9781,0
       1. c1t1d0 <sun72g cyl alt hd sec>
          /pci@9,600000/SUNW,qlc@2/fp@0,0/ssd@w500000e0106ef871,0
       2. c2t0d0 <dgc-raid5-0206 cyl alt hd sec>
          /pci@8,700000/fibre-channel@4/sd@0,0
       3. c2t1d0 <dgc-raid5-0206 cyl alt hd sec>
          /pci@8,700000/fibre-channel@4/sd@1,0
       4. c3t0d0 <dgc-raid5-0206 cyl alt hd sec>
          /pci@8,700000/fibre-channel@5/sd@0,0
       5. c3t1d0 <dgc-raid5-0206 cyl alt hd sec>
          /pci@8,700000/fibre-channel@5/sd@1,0
       6. emcpower7a <dgc-raid5-0206 cyl alt hd sec>
          /pseudo/emcp@7
Specify disk (enter its number): ^D    
  </dgc-raid5-0206></dgc-raid5-0206></dgc-raid5-0206></dgc-raid5-0206></dgc-raid5-0206></sun72g></sun72g>

具体Powermt命令参考:

http://blog.csdn.net/eygle/archive/2004/09/23/113881.aspx

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