If there is an amber light on after the disk change it's probably not assigned.
But as far as disk status in the shelf. check out this command:
CLUSTER::> storage shelf show -bay
Shelf Name: 2.0
Stack ID: 2
Shelf ID: 0
Shelf UID: 00:00:00:00:00:00:00:00
Serial Number: xxxxxxxxxxxxx
Module Type: IOM6E
Model: DS4246
Shelf Vendor: NETAPP
Disk Count: 24
Connection Type: SAS
Shelf State: Online
Status: Normal
Bays:
Has Operational
ID Disk Bay Type Status
--- ----- ----------- -----------
0 true single-disk normal
1 true single-disk normal
2 true single-disk normal
3 true single-disk normal
4 true single-disk normal
5 true single-disk normal
6 true single-disk normal
7 true single-disk normal
8 true single-disk normal
9 true single-disk normal
10 true single-disk normal
11 true single-disk normal
12 true single-disk normal
13 true single-disk normal
14 true single-disk normal
15 true single-disk normal
16 true single-disk normal
17 true single-disk normal
18 true single-disk normal
19 true single-disk normal
20 true single-disk normal
21 true single-disk normal
22 true single-disk normal
23 true single-disk normal
Errors:
------
-
storage shelf show -instance will give you a lot of detail about the shelves / disks