Hitachi TAGMASTORE MK-90RD011-25 User Manual page 222

In case of state No. 17:
This case is pair suspend (using pairsplit command) by
operator. The DC1 takes over processing from the DC2,
when the DC2 has PSUS state DC1(SVOL-PSUS) & DC2(PVOL-
PSUS) that will be needed that ask operator for decision,
and/or pairresync on the DC1 side. If the DC1 takes over
processing from the DC2 without their confirmation
operations, horctakeover command will be returned with
SVOL_E (execute SVOL-takeover and return EX_VOLCUR)
on the (DC1) side.
state is No. 17.
Consideration as for state No. 9
The horctakeover command will be failed with EX_ENORMT on the following nested failure
case (state No. 4 9). Therefore, HA Control Script will be needed that ask operator for
decision, and do nothing on the DC1 side.
Host A
Host B
PVOL SVOL
DC1
DC2
State No. 16
204 Chapter 4 Performing CCI Operations
Host A
Host C
DC2 site failure
PVOL
DC2
State No. 23 4
Host Host Host A
B C
Host B failure
SMPL
DC1
Host A
Host B
PVOL
SVOL
PSUS
PSUS
DC1
DC2
State No. 17
Host B
Host
C
P
SMPL
vol
DC2 DC1
State No. 4 9