sudipmis
asked on
PowerPath Failure...
Hi,
I have a Clariion cx700. PowerPath on my exchange server reported the errors below. We have a single port HBA and configured for failover. PowerPath Monitor reports pathname "c4t0d1" as failed, "c4t0d0" as optimal. Under "disk's", it shows "Disk 006" and "Dev ???". Did a drive die? The switches seem ok.
Event Log errors:
1: Path Bus 4 Tgt 0 Lun 1 to APM00052803117 is dead.
2: The device 'DGC RAID 5 SCSI Disk Device' (SCSI\Disk&Ven_DGC&Prod_RA
Thanks.
I have a Clariion cx700. PowerPath on my exchange server reported the errors below. We have a single port HBA and configured for failover. PowerPath Monitor reports pathname "c4t0d1" as failed, "c4t0d0" as optimal. Under "disk's", it shows "Disk 006" and "Dev ???". Did a drive die? The switches seem ok.
Event Log errors:
1: Path Bus 4 Tgt 0 Lun 1 to APM00052803117 is dead.
2: The device 'DGC RAID 5 SCSI Disk Device' (SCSI\Disk&Ven_DGC&Prod_RA
Thanks.
What you first need to do is check for a trespassed LUN. Since you have a single HBA, then you are probably using PowerPath basic--That could mean that the LUN could have trespassed to the other SP, and you are not zoned to that SP's port.
Check your paths with:
powermt display every=5
The easiest thing to do first is to see if the LUN just went offline and then online again (fabric event.)
powermt restore
powermt config
powermt save
If that doesn't fix it, then go into Navisphere Manager and select "Trespassed LUN Status" from the menu. Give it a few seconds to populate. If your particular LUN has trespassed, then you need to trespass it back, and then restore the PowerPath config just to be safe.
Check your paths with:
powermt display every=5
The easiest thing to do first is to see if the LUN just went offline and then online again (fabric event.)
powermt restore
powermt config
powermt save
If that doesn't fix it, then go into Navisphere Manager and select "Trespassed LUN Status" from the menu. Give it a few seconds to populate. If your particular LUN has trespassed, then you need to trespass it back, and then restore the PowerPath config just to be safe.
With respect, if the LUN was trespassed, then PowerPath would report that it could see the LUN - it wouldn't display "Dev ???". This is either a break in connectivity or someone's gone and removed the LUN from the storage group...
ASKER
Hi,
There are no trespassed lun's.
There are no trespassed lun's.
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After running powermt check it prompts for y, and when I select y it goes back to the command prompt. I open the admin console and it's still showing dead. Any tips on fixing?
Open Computer Management, go to Device Manager and do a scan for hardware changes.
Open a command prompt. path to C:\Program Files\EMC\PowerPath and run:
powermt remove dev=all
This will remove the paths to the missing LUN and PowerPath will stop complaining.
However, if the LUN was not removed on purpose, then we have a different issue happening. If the LUN was not removed administratively then the most likely cause for the issue is bad FC switch zoning or a bad FC cable - and this should be addressed first.