Veritas InfoScale 7.4.1 Support for SUSE 15 Release Notes - Linux
Limitation
This software limitation applies to the following products:
Veritas InfoScale Foundation
Veritas InfoScale Storage
Veritas InfoScale Enterprise
Veritas File System (VxFS) allocates disk space to files in groups of one or more extents. Extents are either preallocated, or allocated to a file, when there is need to write new data in the files. The extent information is maintained in the extent map (space allocation map). The vxverify command uses this extent map to check the consistencies in the mirrors or the link snapshots of a volume. However, an extent map cannot guarantee that all the in-use extents contain data. Therefore, in some cases the vxverify command might report false-negative alarms on the regions where VxFS has never written any data but that in use by the file system.
When the vxverify command reports false-negative failures, you must perform the following tasks to verify the consistency of data:
Verify the checksum of the files on the source volume and on the snapshot volumes in case of link snapshots.
Set the read mirror plex preference to each mirror, read data from it, and match the checksum of each file in the file system.