Executing multipath -ll on Optane memory based pmem devices returns HDIO_GETGEO failed with 25

This document (000019884) is provided subject to the disclaimer at the end of this document.

Environment

SUSE Linux Enterprise Server 15 SP2

Situation

When listening multipath devices, Optane memory based /dev/pmem* devices are listed as well and return an error like:

 

sles15sp2:~> sudo multipath -ll
Feb 17 16:37:46 | pmem0: HDIO_GETGEO failed with 25
Feb 17 16:37:46 | pmem1: HDIO_GETGEO failed with 25
Feb 17 16:37:46 | pmem2: HDIO_GETGEO failed with 25
Feb 17 16:37:46 | pmem3: HDIO_GETGEO failed with 25
mpd_6 (360060e80075a610000305a6100000123) dm-0 HITACHI,OPEN-V
size=408G features='0' hwhandler='0' wp=rw
`-+- policy='service-time 0' prio=1 status=active
  |- 0:0:0:0 sda   8:0   active ready running
  `- 1:0:0:0 sdb   8:16  active ready running

 

Resolution

This issue has been reported to engineering for further investigation. For the time being, please add:

 

blacklist {
   devnode "^pmem[0-9][0-9]*"
}

 

to /etc/multipath.conf to exclude the pmem devices from being accessed by multipathd.
If required, execute

 

dracut -f

 

to keep the system version of /etc/multipath.conf in sync with the copy inside the initial ramdisk (initrd)

Status

Reported to Engineering

Disclaimer

This Support Knowledgebase provides a valuable tool for SUSE customers and parties interested in our products and solutions to acquire information, ideas and learn from one another. Materials are provided for informational, personal or non-commercial use within your organization and are presented "AS IS" WITHOUT WARRANTY OF ANY KIND.

  • Document ID:000019884
  • Creation Date: 18-Feb-2021
  • Modified Date:02-Mar-2021
    • SUSE Linux Enterprise Server

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