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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.


SUSE Linux Enterprise Server 15 SP2


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



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)


Reported to Engineering


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

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