cannot open /dev/rdsk/emcpower

Question

Hi! I have a problem with ax2-5 and solaris. After rebuilding virtual disks i'am get this problems: #powermt display dev=allPseudo name=emcpower0aCLARiiON ID=CK200090200606 [nas2]Logical device ID=60060160C86A2300044B468DE166DE11 [System]state=alive; policy=StreamIo; priority=0; queued-IOs=0Owner: default=SP A, current=SP A       Array failover mode: 1==============================================================================---------------- Host ---------------   - Stor -   -- I/O Path -  -- Stats ---###  HW Path                I/O Paths    Interf.   Mode    State  Q-IOs Errors==============================================================================3072 pci@0,0/pci8086,25f8@4/pci1077,15b@0/fp@0,0 c0t500601603BA005D6d0s0 SP A0     active  alive      0      03072 pci@0,0/pci8086,25f8@4/pci1077,15b@0/fp@0,0 c0t500601683BA005D6d0s0 SP B0     active  alive      0      03073 pci@0,0/pci8086,25f8@4/pci1077,15b@0,1/fp@0,0 c1t500601613BA005D6d0s0 SP A1     active  alive      0      03073 pci@0,0/pci8086,25f8@4/pci1077,15b@0,1/fp@0,0 c1t500601693BA005D6d0s0 SP B1     active  alive      0      0 Pseudo name=emcpower2aCLARiiON ID=CK200090200606 [nas2]Logical device ID=60060160C86A2300B63A2034D6C1DF11 [Storage]state=alive; policy=StreamIo; priority=0; queued-IOs=0Owner: default=SP A, current=SP B       Array failover mode: 1==============================================================================---------------- Host ---------------   - Stor -   -- I/O Path -  -- Stats ---###  HW Path                I/O Paths    Interf.   Mode    State  Q-IOs Errors==============================================================================3072 pci@0,0/pci8086,25f8@4/pci1077,15b@0/fp@0,0 c0t500601603BA005D6d1s0 SP A0     active  alive      0      03072 pci@0,0/pci8086,25f8@4/pci1077,15b@0/fp@0,0 c0t500601683BA005D6d1s0 SP B0     active  alive      0      03073 pci@0,0/pci8086,25f8@4/pci1077,15b@0,1/fp@0,0 c1t500601613BA005D6d1s0 SP A1     active  alive      0      03073 pci@0,0/pci8086,25f8@4/pci1077,15b@0,1/fp@0,0 c1t500601693BA005D6d1s0 SP B1     active  alive      0      0 #zpool create storage emcpower2acannot open '/dev/dsk/emcpower2a': No such device or address root@nas2:~ #cat /dev/dsk/emcpower2acat: cannot open /dev/dsk/emcpower2a No access! Or no permissions? Or somebody block it? how to solve the problem? Thanks! ps: sorry for poor english

dynamox · Answer

Did remove devices from this host, rebuild them and now presented them back ?

LMik · Answer

First i was remove old zfs pool named 'storage'. Next - remove virtual disk on ax5-4 Next - create new virtual disks. Next: devfsadm -C powercf -q - in this step old emcpower was removed powermt config End.

LMik · Answer

The correct device file was somehow emcpower0h

LMik · Answer

Hi Nollaig, thank you.

I install fresh Solaris on localdrive and PowerPath 5.2 SP2. Correct working device for AX4-5 i was found at /dev/dsk/emcpower0h, but powermt display show it in emcpower0a.

It looks like I just misunderstood from a manual about the address of the pseudo-device.

Nollaig1 · Answer

Hello Lmik,

Just came accross a few knowledgebase solutions which may help. First I would recommend ensuring your EMC recommended kernel patches are up to date. Knowledgebase emc136049, shows a similar issue which was resolved by updating to EMC recommended SUN patch levels.

You can check this by running a grabfile on your host (available from ftp.emc.com/pub/emcgrab/Unix) and checking the resulting file through the HEAT tool available on powerlink.

You dont mention what version powerpath you are running, knowledgebase emc190249 details an issue seen with trespassed devices (I see the second device above is trespassed) This issue has been resolved in PP PowerPath 5.2 SP1 and higher.

Hope this helps,

Regards,

Nollaig

PowerPath

Was this post helpful?