An administrator is attempting to add a volume to a volume group but it does not show up in the list of volumes available to move in, even though it…

On a Pure Storage FlashArray, a volume can only be a member of a single volume group at any given time. If an administrator attempts to add a volume to a new group and it does not appear in the list of available volumes, the most common reason is that it is already assigned to another volume group. To add the volume to the new group, it must first be removed from its current volume group.

B. A volume's membership in a Protection Group is independent of its membership in a Volume Group. A volume can belong to both simultaneously.

C. SafeMode protects snapshots and policies from deletion or modification but does not restrict a volume from being managed within a volume group.

1. Pure Storage, Inc. (2023). Purity//FA 6.4 Administration Guide. Section: "Storage > Volume Groups > Managing Volume Groups". The documentation states the constraint that a volume can belong to only one volume group.

2. Pure Storage, Inc. (2022). FlashArray Best Practices. Section: "Volume and Host Management". This guide explains that volume groups are used for consistent management and that membership is exclusive.