Chaim,
I tried a few things to re-create the problem with no success. In a case like this, you might try removing 1 disk from the shelf to see if that would wake it up. You might want to do the disk remove <disk_name> first, or let NetApp know what you are doing via autosupport. Otherwise you'll end up with a bunch of replacement disks at your office :-)
The only other thing I can think of would be a "storage show shelf". Look at the adapters that connect to that shelf and see what they show. If for some reason one showed shelf 0 and the other showed shelf 4, you could try resetting the cable on the one that showed it as shelf 0.
Sorry I couldn't be of more help.
Jeff
aggr status -s
Spare disks
RAID Disk Device HA SHELF BAY CHAN Pool Type RPM Used (MB/blks) Phys (MB/blks) --------- ------ ------------- ---- ---- ---- ----- -------------- -------------- Spare disks for block or zoned checksum traditional volumes or aggregates spare 1a.SHU0946855G08JL.17 1a 0 17 SA:A - SAS 15000 418000/856064000 420156/860480768 spare 1a.SHU0946855G08JL.18 1a 0 18 SA:A - SAS 15000 418000/856064000 420156/860480768 spare 1a.SHU0946855G08JL.19 1a 0 19 SA:A - SAS 15000 418000/856064000 420156/860480768 spare 1a.SHU0946855G08JL.20 1a 0 20 SA:A - SAS 15000 418000/856064000 420156/860480768 spare 1a.SHU0946855G08JL.21 1a 0 21 SA:A - SAS 15000 418000/856064000 420156/860480768 spare 1a.SHU0946855G08JL.22 1a 0 22 SA:A - SAS 15000 418000/856064000 420156/860480768 spare 1a.SHU0946855G08JL.23 1a 0 23 SA:A - SAS 15000 418000/856064000 420156/860480768 spare 1a.01.6 1a 1 6 SA:A - SAS 15000 418000/856064000 420156/860480768 spare 1a.01.18 1a 1 18 SA:A - SAS 15000 418000/856064000 420156/860480768 spare 1a.01.20 1a 1 20 SA:A - SAS 15000 418000/856064000 420156/860480768 spare 1a.01.21 1a 1 21 SA:A - SAS 15000 418000/856064000 420156/860480768 spare 1a.01.22 1a 1 22 SA:A - SAS 15000 418000/856064000 420156/860480768 spare 1a.01.23 1a 1 23 SA:A - SAS 15000 418000/856064000 420156/860480768 spare 1a.02.17 1a 2 17 SA:A - SAS 15000 418000/856064000 420156/860480768 spare 1a.02.18 1a 2 18 SA:A - SAS 15000 418000/856064000 420156/860480768 spare 1a.02.19 1a 2 19 SA:A - SAS 15000 418000/856064000 420156/860480768 spare 1a.02.20 1a 2 20 SA:A - SAS 15000 418000/856064000 420156/860480768 spare 1a.02.21 1a 2 21 SA:A - SAS 15000 418000/856064000 420156/860480768 spare 1a.02.22 1a 2 22 SA:A - SAS 15000 418000/856064000 420156/860480768 spare 1a.02.23 1a 2 23 SA:A - SAS 15000 418000/856064000 420156/860480768 spare 1d.03.16 1d 3 16 SA:B - SAS 15000 418000/856064000 420156/860480768 spare 1d.03.17 1d 3 17 SA:B - SAS 15000 418000/856064000 420156/860480768 spare 1d.03.18 1d 3 18 SA:B - SAS 15000 418000/856064000 420156/860480768 spare 1d.03.19 1d 3 19 SA:B - SAS 15000 418000/856064000 420156/860480768 spare 1d.03.20 1d 3 20 SA:B - SAS 15000 418000/856064000 420156/860480768 spare 1d.03.21 1d 3 21 SA:B - SAS 15000 418000/856064000 420156/860480768 spare 1d.03.22 1d 3 22 SA:B - SAS 15000 418000/856064000 420156/860480768 spare 1d.03.23 1d 3 23 SA:B - SAS 15000 418000/856064000 420156/860480768 spare 1a.01.19 1a 1 19 SA:A - SAS 15000 418000/856064000 420584/861357448 spare 1d.04.0 1d 0 0 SA:B - SAS 15000 560000/1146880000 560208/1147307688 spare 1d.04.1 1d 0 1 SA:B - SAS 15000 560000/1146880000 560208/1147307688 spare 1d.04.2 1d 0 2 SA:B - SAS 15000 560000/1146880000 560208/1147307688 spare 1d.04.3 1d 0 3 SA:B - SAS 15000 560000/1146880000 560208/1147307688 spare 1d.04.4 1d 0 4 SA:B - SAS 15000 560000/1146880000 560208/1147307688 spare 1d.04.5 1d 0 5 SA:B - SAS 15000 560000/1146880000 560208/1147307688 spare 1d.04.6 1d 0 6 SA:B - SAS 15000 560000/1146880000 560208/1147307688 spare 1d.04.7 1d 0 7 SA:B - SAS 15000 560000/1146880000 560208/1147307688 spare 1d.04.8 1d 0 8 SA:B - SAS 15000 560000/1146880000 560208/1147307688 spare 1d.04.9 1d 0 9 SA:B - SAS 15000 560000/1146880000 560208/1147307688 spare 1d.04.10 1d 0 10 SA:B - SAS 15000 560000/1146880000 560208/1147307688 spare 1d.04.11 1d 0 11 SA:B - SAS 15000 560000/1146880000 560208/1147307688 spare 1d.04.12 1d 0 12 SA:B - SAS 15000 560000/1146880000 560208/1147307688 spare 1d.04.13 1d 0 13 SA:B - SAS 15000 560000/1146880000 560208/1147307688 spare 1d.04.14 1d 0 14 SA:B - SAS 15000 560000/1146880000 560208/1147307688 spare 1d.04.15 1d 0 15 SA:B - SAS 15000 560000/1146880000 560208/1147307688 spare 1d.04.16 1d 0 16 SA:B - SAS 15000 560000/1146880000 560208/1147307688 spare 1d.04.17 1d 0 17 SA:B - SAS 15000 560000/1146880000 560208/1147307688 spare 1d.04.18 1d 0 18 SA:B - SAS 15000 560000/1146880000 560208/1147307688 spare 1d.04.19 1d 0 19 SA:B - SAS 15000 560000/1146880000 560208/1147307688 spare 1d.04.20 1d 0 20 SA:B - SAS 15000 560000/1146880000 560208/1147307688 spare 1d.04.21 1d 0 21 SA:B - SAS 15000 560000/1146880000 560208/1147307688 spare 1d.04.22 1d 0 22 SA:B - SAS 15000 560000/1146880000 560208/1147307688 spare 1d.04.23 1d 0 23 SA:B - SAS 15000 560000/1146880000 560208/1147307688