Getting '/dev/sdx: Can't open blockdev' messages in logs

Solution Verified - Updated -

Issue

  • Getting /dev/sdx: Can't open blockdev messages in logs

    register_make_request(mms,7731): OK. kdev=8:2, mq=1.
snumbdctl_open(mms,19633): OK s=000000005xxxxxxx
session_init(mms,19633): OK. kdev=fc:1, len=8388608 sect=512 s=000000005xxxxxxx pgrp=(64865).
snumbd_open_blk(systemd-udevd,19635): Disable access (868,64865,64865)...
snumbdctl_release(mms,19633): OK s=000000005xxxxxxx
/dev/sdad: Can't open blockdev
/dev/sdag: Can't open blockdev
/dev/sdar: Can't open blockdev
[...]

Environment

  • Red Hat Enterprise Linux 8.4
  • Acronis Snapshot kernel API (snapapi26.ko)
  • Acronis User Mode Block Device (snumbd26.ko)

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