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000-221 · Question #172

The following verification routine is part of a script used to automate cloning rootvg. This routine determines which disks are available for use. Applying the logic, what configuration of disk…

The correct answer is D. A SAN disk virtualized as a Virtual SCSI disk, currently not part of a volume group. AIX rootvg cloning scripts select only disks that are free of existing volume group membership and accessible as standard block devices, excluding NPIV and already-claimed disks.

Storage Management

Question

The following verification routine is part of a script used to automate cloning rootvg. This routine determines which disks are available for use. Applying the logic, what configuration of disk would be selected by the script as a candidate?

Exhibit

000-221 question #172 exhibit

Options

  • AA SAN disk virtualized by NPIV.
  • BA local physical SAS drive, currently a member of the vg00 volume group.
  • CA physical SATA disk drive, currently containing the altinst_rootvg volume group.
  • DA SAN disk virtualized as a Virtual SCSI disk, currently not part of a volume group

How the community answered

(31 responses)
  • A
    10% (3)
  • B
    16% (5)
  • C
    3% (1)
  • D
    71% (22)

Why each option

AIX rootvg cloning scripts select only disks that are free of existing volume group membership and accessible as standard block devices, excluding NPIV and already-claimed disks.

AA SAN disk virtualized by NPIV.

NPIV-virtualized SAN disks are typically excluded by AIX cloning scripts because they require specific boot configuration support and the script logic filters them out as unsuitable primary targets.

BA local physical SAS drive, currently a member of the vg00 volume group.

This disk is already a member of vg00, meaning it has active LVM metadata, and the script rejects any disk that belongs to an existing volume group to prevent data loss.

CA physical SATA disk drive, currently containing the altinst_rootvg volume group.

This disk already contains the altinst_rootvg volume group, so it is not unallocated and would be excluded by the script's check for disks with no existing volume group assignment.

DA SAN disk virtualized as a Virtual SCSI disk, currently not part of a volume groupCorrect

A Virtual SCSI disk not belonging to any volume group satisfies both conditions checked by rootvg cloning scripts: it is accessible as a standard block device and carries no existing LVM metadata that would conflict with the clone operation. Virtual SCSI disks in AIX LPARs are fully supported for alt_disk_copy operations, making this the valid candidate.

Concept tested: AIX rootvg clone candidate disk selection criteria

Source: https://www.ibm.com/docs/en/aix/7.3?topic=commands-alt-disk-copy-command

Topics

#rootvg cloning#volume group#Virtual SCSI#disk selection

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