Sun Cluster Geographic Edition Data Replication Guide for Hitachi TrueCopy

Switchover Failure Conditions

This section describes a switchover failure scenario. In this scenario, cluster-paris is the original primary cluster and cluster-newyork is the original secondary cluster.

A switchover switches the services from cluster-paris to cluster-newyork as follows:

phys-newyork-1# geopg switchover -f -m cluster-newyork tcpg

While processing the geopg switchover command, the horctakeover command performs an SVOL-SSUS-takeover and returns a value of 5 for the Hitachi TrueCopy device group, devgroup1. As a result, the geopg switchover command returns with the following failure message:

Processing operation.... this may take a while ....
"Switchover" failed for the following reason:
			Switchover failed for Truecopy DG devgroup1

After this failure message has been issued, the two clusters are in the following states:

		tcpg role: Secondary
		tcpg role: Secondary

phys-newyork-1# pairdisplay -g devgroup1 -fc
Group  PairVol(L/R) (Port#,TID,LU),Seq#,LDEV#.P/S, Status,Fence,%, P-LDEV# M 
devgroup1 pair1(L) (CL1-C , 0, 20)12345 609..S-VOL SSWS  ASYNC,100   1    -
devgroup1 pair1(R) (CL1-A , 0, 1) 54321   1..P-VOL PSUS  ASYNC,100  609   -