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  1. Home
  2. NetBackup™ Snapshot Manager for Cloud Install and Upgrade Guide
  3. Section II. NetBackup Snapshot Manager for Cloud maintenance
  4. Troubleshooting NetBackup Snapshot Manager for Cloud
  5. Cannot read superblock on /dev/mapper/<VG>-<LV>
NetBackup™ Snapshot Manager for Cloud Install and Upgrade Guide

Cannot read superblock on /dev/mapper/<VG>-<LV>

After an in-place restore of an OCI instance, if the LVM was created as part of the disk partition, then the LVM cannot determine the state of the volume group, and the LVM is not mounted by default.

Workaround:

Reactivate the volume group to solve the issue, run these command, one by one:

vgchange -a n <volume group name>

vgchange -a y <volume group name>

mount /dev/<volume group name>/<Logical_Volume> <mount_point>

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