power path reporting "unknown" paths

[Simeon Harwood]

Morning all,
Has anyone seen this before?
I've been doing some house keeping, and found that power path reports some dead paths, so I tried to clean them up.

# powermt display dev=all|grep -i dead
12 0/4/1/0.1.6.0.0.0.1 unknown SP B1 active dead 0 1
13 0/4/1/0.1.7.0.0.0.1 unknown SP A0 active dead 0 1
10 0/4/1/1.1.6.0.0.0.1 unknown SP B0 active dead 0 1
11 0/4/1/1.1.7.0.0.0.1 unknown SP A1 active dead 0 1
# powermt check
Warning: CLARiiON device path unknown is currently dead.
Do you want to remove it (y/n/a/q)? a
Illegal device unknown.
Volume not found.
Warning: CLARiiON device path unknown is currently dead.
Illegal device unknown.
Volume not found.
Warning: CLARiiON device path unknown is currently dead.
Illegal device unknown.
Volume not found.
Warning: CLARiiON device path unknown is currently dead.
Illegal device unknown.
Volume not found.
# powermt remove force dev=0/4/1/0.1.6.0.0.0.1
Bad dev value 0/4/1/0.1.6.0.0.0.1, or not under Powerpath control.


Anyone got any idea's how to clean them up.
Ta,
Sime.

[Peter Godron]

Sime,
first try:
powermt display paths

syntax for powermt:

powermt remove force dev=cXtXdX

[Simeon Harwood]

Hi Peter,
Thanks for the quick responce,

I tried the powermt command, and this is what is gave me: -

# powermt display paths
Symmetrix logical device count=0
==============================================================================
----- Host Bus Adapters --------- ------ Storage System ----- - I/O Paths -
### HW Path ID Interface Total Dead
==============================================================================

CLARiiON logical device count=36
==============================================================================
----- Host Bus Adapters --------- ------ Storage System ----- - I/O Paths -
### HW Path ID Interface Total Dead
==============================================================================
10 0/4/1/1.1.6.0.0 CK200054901331 SP B0 36 1
11 0/4/1/1.1.7.0.0 CK200054901331 SP A1 36 1
12 0/4/1/0.1.6.0.0 CK200054901331 SP B1 36 1
13 0/4/1/0.1.7.0.0 CK200054901331 SP A0 36 1


But I still have my dead paths, and they are in state "unknown" so I can't use the last command to delete the device file.

Sime.

[Yang Qin_1]

Hi, Sime, it looks like you missed one LUN or otherwise you removed one LUN from that server. run "ioscan -fnCdisk" and check if you have NO_HW displayed. You can also count the number of Clariion disks you have with "ioscan -fnCdisk|grep DGC|wc -l" and see if you have 144 disks or not


Yang

[Simeon Harwood]

I've spoke to EMC about this.
Apparently I have to remove this file: -
/etc/powermt.custom
reboot
powermnt save

This should sort me out. I can't do it now because the machines are in production, so I'll have to wait.