• 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.
Step 1. Verify that your system configuration is
Multi-Path HA
,
Multi-Path
,
Quad-path HA
, or
Quad-path
: First
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:
a. Enter the following command from the clustershell of either controller:
storage disk show
-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 Container Container
Disk
Size Shelf Bay Type Type
Name
Owner
-------- -------- ----- --- ------ ----------- ---------- ---------
...
1.3.4
-
3 4 SAS unassigned
-
-
1.3.5
-
3 5 SAS unassigned
-
-
1.3.6
-
3 6 SAS broken
-
-
1.3.7
-
3 7 SAS broken
-
-
...
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.
38
Service Guide for DM120S, DM240S, and DM600S
Summary of Contents for 7Y43
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