Urgent - disk error

Question

I am seeing this error on AIX host connected to DMX. powermt display is showing "0" IO error.. what could be the reason for this error.

is there any command to confirm that the problem is not with DMX.

LABEL: SC_DISK_ERR2
IDENTIFIER: B6267342

Date/Time: Tue Jun 23 01:20:40 CDT 2009
Sequence Number: 3911
Machine Id: 00xxxxxxxx00
Class: H
Type: PERM
WPAR: Global
Resource Name: hdisk10
Resource Class: disk
Resource Type: SYMM_RAID1
Location: U5791.001.9920R22-P1-C08-T1-W50060482D52DDDA7-LAF000000000000
VPD:
Manufacturer................EMC
Machine Type and Model......SYMMETRIX
ROS Level and ID............5771
Serial Number...............xxxxx000
Part Number.................000000000000xxxxxxxxxxxx
EC Level....................101366
LIC Node VPD................00CD
Device Specific.(Z0)........03
Device Specific.(Z1)........61
Device Specific.(Z2)........577101050000000000012408
Device Specific.(Z3)........12000000
Device Specific.(Z4)........54130008
Device Specific.(Z5)........1F80
Device Specific.(Z6)........45

Description
DISK OPERATION ERROR

Probable Causes
DASD DEVICE

Failure Causes
DISK DRIVE
DISK DRIVE ELECTRONICS

Remove machine ID and serial number.
Message was edited by:
KCSCP

MikeMac1 · Answer

By any chance have you switched from IBM fibre channel interface to EMC fibre channel interface?

dynamox · Answer

i would open an urgent ticket and have support run a health check on your DMX.

snadora · Answer

No....

Tanwar2 · Answer

Hello Tammy,If there is any problem on your DMX you can check ussing the following command :symevent list -sid xxx -v //check if there is any fatal error is thorwing in it.Sanjeev Tanwar

snadora · Answer

No error in the symevent list

Tanwar2 · Answer

If you can try to unmask and unmap the device and try to again map it with different lun id.......then see if it resolve your problem

MikeMac1 · Answer

Tammy, have you had any luck resolving this issue?

snadora · Answer

No...I saw some error in connectrix manager and cleared those error...i observed for few days still I am still getting the errrori have to work with EMC and IBM

techmute · Answer

It could be a reservation issue on AIX. Whats the policy set to? Is this a device that is allocated to an HA cluster or a pair of VIOSs?

snadora · Answer

Pseudo name=hdiskpower0Symmetrix ID=0001901xxxxxLogical device ID=00C1state=alive; policy=SymmOpt; priority=0; queued-IOs=0Message was edited by: MikeMac Removed Symm S/N

samaks · Answer

Are you getting the errorss for only this disk? Is SC3 bit set on Symmetrix for AIX host?

snadora · Answer

as per my understanding i set it... do you know how to check whether it is set or not?

Tanwar2 · Answer

You can check on the device using commandsymmaskdb list database -wwn xxxxxxxxx -vSanjeev Tanwar

samaks · Answer

You can check the setting of the director which the host is connected to first:

symcfg list -dir xx(for ex 7a) -p x(for ex 0) -v

Look for the below line in SCSI flags:

SCSI_3(SC3) : Enabled

If not;

Check the VCM config with:

symmaskdb list database -dir xx-p x -v

Look for:
Heterogeneous Host : --> This may be IBM_AIX
Port Flag Overrides : Yes
Enabled : SCSI_3(SC3) ---> Or this may be enabled.
Disabled : N/A

snadora · Answer

SCSI 3 showing enabled.

Symmetrix

Urgent - disk error

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