Lenovo DM120S Service Manual page 42

• If you are hot-removing a disk shelf from a stack (but keeping the stack), you recable and verify one path
at a time (path A then path B) to bypass the disk shelf you are removing so that you always maintain
single-path connectivity from the controllers to the stack.
Attention: If you do not maintain single-path connectivity from the controllers to the stack when recabling
the stack to bypass the disk shelf you are removing, you could fail the system with a multidisk panic.
Verify that your system configuration is Multi-Path HA, Multi-Path, Quad-path HA, or Quad-path: First
Step 1.
access the nodesheell by running system node run node name. When the nodeshell prompts, run
sysconfig. You run this command from the nodeshell of either controller. It might take up to a
minute for the system to complete discovery.
The configuration is listed in the System Storage Configuration field.
Note: For DM3000x, DM5000x, or DM7000x systems with external storage, the output is displayed
as Mixed-Path HA for an HA pair, or Mixed-Path for a single-controller configuration because the
internal storage is cabled differently than the external storage. For an HA pair, the internal storage is
cabled as single-path HA and the external storage is cabled as multipath HA. For a single-controller
configuration, the internal storage is cabled as single-path and the external storage is cabled as
multipath.
Step 2. Verify that the disk drives in the disk shelves you are removing have no aggregates (are spares) and
ownership is removed, by completing the following substeps:
Enter the following command from the clustershell of either controller: storage disk show
a.
-shelf shelf_number
b. Check the output to verify there are no aggregates on the disk drives in the disk shelves you
are removing.Disk drives with no aggregates have a dash in the Container Name column.
c. Check the output to verify that ownership is removed from the disk drives on the disk shelves
you are removing.Disk drives with no ownership have unassigned in the Container Type column.
Note: If you have failed disk drives in the shelf you are removing, they have broken in the
Container Type column. (Failed disk drive do not have ownership.)
Example
The following output shows disk drives on the disk shelf being removed (disk shelf 3) are in a
correct state for removing the disk shelf. Aggregates have been removed on all of the disk drives in
disk shelf 3; therefore, a dash appears in the Container Name column for each disk drive. Ownership
has been removed on two disk drives; therefore, unassigned appears in the Container Type column.
And two disk drives are failed; therefore, broken appears in the Container Type column:
cluster::> storage disk show -shelf 3
Usable
Disk Size Shelf Bay Type
-------- -------- ----- --- ------ ----------- ---------- ---------
...
1.3.4
1.3.5
1.3.6
1.3.7
...
Step 3. Physically locate the disk shelves you are removing. If needed, you can turn on the disk shelf's
location (blue) LEDs to aid in physically locating the affected disk shelf: storage shelf location-led
modify -node node_name -shelf-name shelf_name -led-status on
Note: A disk shelf has three location (blue) LEDs: one on the operator display panel and one on
each IOM12 module. Location LEDs remain illuminated for 30 minutes. You can turn them off by
entering the same command, but using the off option.
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Service Guide for DM120S, DM240S, and DM600S
Disk Container
Type
- 3 4 SAS unassigned
- 3 5 SAS unassigned
- 3 6 SAS broken
- 3 7 SAS broken
Container
Name Owner
- -
- -
- -
- -