====== EMC symcli/Powerpath cmd ======

First install symcli

List storage ID 
<cli>
symcfg list
</cli>

Backup / export symcli config
<cli>
symdg -sid 1234 exportall -f mydgfile.txt
</cli>

Restore symcli config
<cli>
symdg -sid 1234 importall -f mydgfile.txt
</cli>

Location of symcli logs, config and DB
  * /var/symapi

List DG
<cli>
symdg list
</cli>

List detail of single DG
<cli>
symdg show DGNAME
</cli>

Export a single Disk Group, replace by import to restore
<cli>
symdg -sid 1234 export DGNAME -f myfile.txt
</cli>

Delete a DG
<cli>
symdg delete DGNAME [-force]
</cli>

List disks from a DG
<cli>
symdg show DGNAME  | egrep "DEV0|TGT0"
</cli>

Powermt 

Remove paths and dead disks
<cli>
powermt check [force]
</cli>

List all paths
<cli>
powermt display dev=all
</cli>

Check state of disk (error: unable to open device), check if disk in RW, else not accessible
<cli>
symcfg discover
symcfg list
sympd list | grep 011E
</cli>


===== EMC multipathing licensing =====

List Powerpath license:
  emcpreg -list
  emcpreg -add xxx-yyy-vvvv-hhhh
  
Showing mode as unlicensed
<cli prompt='#'>
[root@mynode1 ~]# powermt display dev=all
Pseudo name=emcpowera
CLARiiON ID=**************** [my_mynode1]
Logical device ID=600601601C22280016002FBEE3C1E111 [LUN 207]
state=alive; policy=BasicFailover; priority=0; queued-IOs=0;
Owner: default=SP B, current=SP B Array failover mode: 4
==============================================================================
————— Host ————— – Stor – — I/O Path — — Stats —
### HW Path I/O Paths Interf. Mode State Q-IOs Errors
==============================================================================
4 qla2xxx sdb SP A1 unlic alive 0 0
4 qla2xxx sdc SP B0 unlic alive 0 0
3 qla2xxx sdd SP A0 active alive 0 0
3 qla2xxx sde SP B1 active alive 0 0
</cli>

Issued below command to check the registration status and found that it is in expired status. Before reboot it was working fine only after reboot we encounter the issue.
<cli prompt='#'>
[root@mynode1 ~]# powermt check_registration
Key ****-****-****-****-****-****
Product: PowerPath
Capabilities: All
Expired: Oct, 2012
</cli>

We registered the new key to get rid of the error.
<cli prompt='#'>
[root@mynode1 ~]# emcpreg -install

=========== EMC PowerPath Registration ===========

Do you have a new registration key or keys to enter?[n] y
Enter the registration keys(s) for your product(s),
one per line, pressing Enter after each key.
After typing all keys, press Enter again.

Key (Enter if done): ****-****-****-****-****-****
1 key(s) successfully added.
Key successfully installed.

Key (Enter if done):
1 key(s) successfully registered.
</cli>

After the successful registration we were able to see the new key along with old one in below command output.
<cli prompt='#'>
[root@mynode1 ~]# powermt check_registration

Key ****-****-****-****-****-****
Product: PowerPath
Capabilities: All
Expired: Oct, 2012

Key ****-****-****-****-****-****
Product: PowerPath
Capabilities: All
</cli>

We removed the old key from the previous output.
<cli prompt='#'>
[root@mynode1 ~]# emcpreg -remove ****-****-****-****-****-****

After the above operation only one key was showing in output which is the newly and desired one.
<cli prompt='#'>
[root@mynode1 ~]# powermt check_registration
Key ****-****-****-****-****-****
Product: PowerPath
Capabilities: All
</cli>

All the paths are showing in active status after that 🙂
<cli prompt='#'>
[root@mynode1 ~]# powermt display dev=all
Pseudo name=emcpowera
CLARiiON ID=**************** [my_mynode1]
Logical device ID=600601601C22280016002FBEE3C1E111 [LUN 207]
state=alive; policy=CLAROpt; priority=0; queued-IOs=0;
Owner: default=SP B, current=SP B Array failover mode: 4
==============================================================================
————— Host ————— – Stor – — I/O Path — — Stats —
### HW Path I/O Paths Interf. Mode State Q-IOs Errors
==============================================================================
4 qla2xxx sdb SP A1 active alive 0 0
4 qla2xxx sdc SP B0 active alive 0 0
3 qla2xxx sdd SP A0 active alive 0 0
3 qla2xxx sde SP B1 active alive 0 0
</cli>