Powerpath: Migration enabler 6.2-during PPME handle setup IO increases across all source disks

Summary: PPME migration seems to have hung Disk Management and PowerPath 6.2 on the B node of an Active/Active cluster. Node A is the one that has 10 handles setup (no sync yet) but node B is showing high I/O across all disks for some reason. ...

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Symptoms

Used diskpart and cmd prompt instead during the PPME migration

High IOs seen on Node B of the cluster while PPME session was set on Node A of the cluster
IO increases across the disks during the PPME handle setup stage, once the PPME handles are cleaned with powermig cleanup, IO normalizes on the disks.

Additionally customer is unable to access Disk Management when PPME is initiated, without a hang.

cluster.txt logs


000012c8.00002818::2017/10/06-04:12:49.647 INFO [RES] Physical Disk: Exit EnumerateDevices: status 0
000012c8.00001b34::2017/10/06-04:12:49.647 INFO [RES] Physical Disk: Enter EnumerateDevices: EnumDevice 0
000012c8.000025bc::2017/10/06-04:12:49.663 ERR [RES] Physical Disk: Failed to get snapshot info for disk, status 21. Ignoring...
000012c8.000025bc::2017/10/06-04:12:49.663 ERR [RES] Physical Disk: Failed to get snapshot info for disk, status 21. Ignoring...
000012c8.000025bc::2017/10/06-04:12:49.663 ERR [RES] Physical Disk: Failed to get snapshot info for disk, status 21. Ignoring..

..............

000012c8.00001ac4::2017/10/06-04:22:19.480 INFO [RES] Physical Disk: Enter EnumerateDevices: EnumDevice 0
000012c8.00001104::2017/10/06-04:22:19.495 ERR [RES] Physical Disk: Failed to get snapshot info for disk, status 21. Ignoring...
000012c8.00001104::2017/10/06-04:22:19.495 ERR [RES] Physical Disk: Failed to get snapshot info for disk, status 21. Ignoring...
000012c8.000003a0::2017/10/06-04:22:19.495 INFO [RES] Physical Disk: Exit EnumerateDevices: status 0
000012c8.00001104::2017/10/06-04:22:19.495 ERR [RES] Physical Disk: Failed to get snapshot info for disk, status 21. Ignoring...
000012c8.00001104::2017/10/06-04:22:19.495 INFO [RES] Physical Disk: Exit EnumerateDevices: status 0
000012c8.000003a0::2017/10/06-04:22:19.511 INFO [RES] Physical Disk: Enter EnumerateDevices: EnumDevice 0
000012c8.000025bc::2017/10/06-04:22:19.526 INFO [RES] Physical Disk: Enter EnumerateDevices: EnumDevice 0

Status 21 in the above logs means The device is not ready. 

000012c8.00001ac4::2017/10/06-04:22:19.480 INFO [RES] Physical Disk: Enter EnumerateDevices: EnumDevice 0
000012c8.00001104::2017/10/06-04:22:19.495 ERR [RES] Physical Disk: Failed to get snapshot info for disk, status 21. Ignoring...
000012c8.00001104::2017/10/06-04:22:19.495 ERR [RES] Physical Disk: Failed to get snapshot info for disk, status 21. Ignoring...
000012c8.000003a0::2017/10/06-04:22:19.495 INFO [RES] Physical Disk: Exit EnumerateDevices: status 0

Cause

Accessing disk management during a PPME handle setup

Resolution

As a part of workaround can use diskpart commands and try performing different task using diskpart,
With above workaround wont blocked by the disk management hang

Also as a workaround for Eventviewer for logs, it can be launched via "eventvwr.msc".

Additional Information

Customer was able to run the diskpart commands and successfully performed the PPME migration.
Server Manager was unusable during the duration of the PPME handle setup and PPME handle sync, so wasn't able  view the event log  or view Disk Manager 

It is not yet clear what was the cause of the issue and PP Engineering is looking into the issue.

Affected Products

Storage Networking
Article Properties
Article Number: 000050087
Article Type: Solution
Last Modified: 04 Nov 2025
Version:  4
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