Cloud DevOps Admin Guide

1.powermt display ====>Display High Level HBA I/O Paths
2.powermt display dev=emcpowera ===>Display for specific LUN
3.powermt display dev=all ====> Display All Attached LUNs
4.powermt check_registration ===> Display PowerPath Registration Key / Status
5.powermt display options ===> Display EMC PowerPath Options
6.powermt display hba_mode ====> Display PowerPath HBA Mode
7.powermt display paths – Display available I/O Paths.
8.powermt displays port_mode ===>Display Port Status
9.powermt version ====> Display EMC PowerPath Version
10.powermt check ===>Check the I/O Paths

1. #powermt display ===>Display High Level HBA I/O Paths

Example output:

Symmetrix logical device count=212
CLARiiON logical device count=0
Hitachi logical device count=0
Invista logical device count=0
HP xp logical device count=0
Ess logical device count=0
HP HSx logical device count=0
==============================================================================
----- Host Bus Adapters ---------  ------ I/O Paths -----  ------ Stats ------
###  HW Path                       Summary   Total   Dead  IO/Sec Q-IOs Errors
==============================================================================
   3 0/4/0/0/0/1                   optimal     424      0       -     0    848
   5 0/5/0/0/0/1                   optimal     424      0       -     0    848

2. #powermt display dev=emcpowera ===>Display specific LUN

When there are multiple LUNs connected to a server, you might want to view information about a specific LUN by providing the logical name of the LUN as shown below.

3.#powermt display dev=all ====> Display All Attached LUNs

Mostly we used to run this command powermt, which will display all the attached logical devices to the server.

Pseudo name=disk915
Symmetrix ID=000290103691
Logical device ID=06B8
state=alive; policy=SymmOpt; priority=0; queued-IOs=0;
==============================================================================
--------------- Host ---------------   - Stor -   -- I/O Path --  -- Stats ---
###  HW Path               I/O Paths    Interf.   Mode    State   Q-IOs Errors
==============================================================================
   3 0/4/0/0/0/1.0x5006048c52a862e7.0x40a6000000000000 c14t4d6   FA  8cB   active  alive       0      2
   3 0/4/0/0/0/1.0x5006048c52a862f7.0x40a6000000000000 c15t4d6   FA  8dB   active  alive       0      2
   5 0/5/0/0/0/1.0x5006048c52a862e8.0x40a6000000000000 c16t4d6   FA  9cB   active  alive       0      2
   5 0/5/0/0/0/1.0x5006048c52a862f8.0x40a6000000000000 c17t4d6   FA  9dB   active  alive       0      2

Pseudo name=disk988
Symmetrix ID=000290103691
Logical device ID=074B
state=alive; policy=SymmOpt; priority=0; queued-IOs=0;
==============================================================================
--------------- Host ---------------   - Stor -   -- I/O Path --  -- Stats ---
###  HW Path               I/O Paths    Interf.   Mode    State   Q-IOs Errors
==============================================================================
   5 0/5/0/0/0/1.0x5006048c52a862e8.0x40dc000000000000 c16t11d4  FA  9cB   active  alive       0      2
   3 0/4/0/0/0/1.0x5006048c52a862e7.0x40dc000000000000 c14t11d4  FA  8cB   active  alive       0      2
   3 0/4/0/0/0/1.0x5006048c52a862f7.0x40ce000000000000 c15t9d6   FA  8dB   active  alive       0      2
   5 0/5/0/0/0/1.0x5006048c52a862f8.0x40ce000000000000 c17t9d6   FA  9dB   active  alive       0      2

Details:

a. Pseudo name=emcpowera – The device name that can be used by the server. For example,
/dev/emcpowera.
b. CLARiiON ID=AAA00000000000 [dev-server] - EMC CLARiiON CX3 serial number and
the server name.
c. Logical device ID=11111111 [LUN 1] – LUN number. For example, LUN 1.
d. state=alive; policy=CLAROpt; – This displays that this particular LUN is valid and using
the CLAROpt policy.
e. Owner: default=SP B, current=SP B – This indicates that the default (and current) owner for
this LUN is storage processor SP B.

4. powermt check_registration – Display PowerPath Registration Key / Status

If you’ve lost the PowerPath registration key that you’ve used during the EMC PowerPath installation, you can retrieve it using the following command.

# powermt check_registration
Key AAAA-BBBB-CCCC-DDDD-EEEE-FFFF
  Product: PowerPath
  Capabilities: All

5. #powermt display options ===> Display EMC PowerPath Options

Displays the high level EMC SAN array options.

6.#powermt display hba_mode ====> Display PowerPath HBA Mode

This is similar to #1, but displays whether hba is enabled or not, as shown in the last column of the output.

Examble output:

Symmetrix logical device count=212
CLARiiON logical device count=0
Hitachi logical device count=0
Invista logical device count=0
HP xp logical device count=0
Ess logical device count=0
HP HSx logical device count=0
==============================================================================
----- Host Bus Adapters ---------  ------ I/O Paths -----  Stats
###  HW Path                       Summary   Total   Dead  Q-IOs Mode
==============================================================================
   3 0/4/0/0/0/1                   optimal     424      0     0 Enabled
   5 0/5/0/0/0/1                   optimal     424      0     0 Enabled

7.powermt display paths ===> Display available I/O Paths.

This displays all available path for your SAN device.

8.powermt displays port_mode ===>Display Port Status

Displays the status of the individual ports on the HBA. i.e Whether the port is enabled or not.

9.powermt version ====> Display EMC PowerPath Version

How to identify the version number of EMC PowerPath software?

10.powermt check ===>Check the I/O Paths

If we made changes to the HBA’s, or I/O paths, then run the powermt check, to take appropriate action. For example,
if you manually removed an I/O path, check command will detect a dead path and remove it from the EMC path list.