HP serviceguard t2808-90006 manual # mdadm -add /dev/md0

Disaster Scenarios and Their Handling
Table 4-1	Disaster Scenarios and Their Handling (Continued)
Disaster Scenario		What Happens When	Recovery Process
		This Disaster Occurs
A package (P1) is running on a		The package (P1) fails over	Complete the following procedure
node (Node 1). The package uses		to Node 2 and starts	to initiate a recovery:
a mirror (md0) that consists of		running with the mirror of	1. Restore data center 1, Node 1
two storage components - S1		md0 that consists of only
(local to Node 1 -		the storage local to node 2	and storage 1. Once Node 1 is
/dev/hpdev/mylink-sde) and		(S2).	restored, it rejoins the cluster.
S2 (local to Node 2)			Once S1 is restored, it
Data center 1 that consists of			becomes accessible from Node
			2.
Node 1 and P1 experiences a
			When the package failed over
failure.
NOTE: In this example, failures			and started on Node 2, S1 was
			not a part of md0. As a result,
in a data center are			you need to add S1 into md0.
instantaneous. For example -			Run the following command to
power failure.			add S1 to md0:
			# mdadm – -add /dev/md0
			/dev/hpdev/mylink-sde
			The re-mirroring process is
			initiated. When it is complete,
			the extended distance cluster
			detects the added mirror half
			and accepts S1 as part of md0.
			2. Enable P1 to run on Node 1 by
			running the following
			command:
			# cmmodpkg -e P1 -n N1

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