.. and introduce some helpers to finding/getting cached disks.
The hd_list method, which scans for physical disks, can be made
private with this change.
Signed-off-by: Thomas Lamprecht <t.lamprecht@proxmox.com>
The assignment to () is confusing, as that's effectively identical
with not assigning it at all and later auto-vivify it to an array
ref, make that more explicit instead.
Signed-off-by: Thomas Lamprecht <t.lamprecht@proxmox.com>
