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Hitachi Command Control Interface (CCI) User and Reference Guide 203
If after pairsplit operation, and when the DC2 takes over
processing from the DC1, the horctakeover command will
be returned with EX_VOLCRE due to (DC2)SMPL &
(DC1)SMPL on the (DC2) side.
Æ state is No. 1.
As for other case:
If the DC2 takes over processing from the DC1 on processing
pairsplit operation, horctakeover command will be returned
with EX_ENQVOL (Unmatch volume status on the group)
due to the group’s volume attribute is not the same on
each volume ((DC2)SMPL & (DC2)PVOL) on the (DC2) side.
In this case, pairvolchk (-s) command will be returned with
EX_ENQVOL on the (DC2) side.
Host A
SMPL
DC2
Host B
SMPL
DC1
State No. 1
pairsplit -S
When the DC1 side has this operation and while the DC1 has
COPY state DC1 (PVOL-COPY) & DC2(SVOL-COPY), if the
DC2 takes over processing from the DC1, and then it will be
needed that ask operator for decision, and/or pairevtwait
(wait for PAIR) on the (DC2) side.
Æ state is No. 15.
If the DC2 takes over processing from the DC1 without their
confirmation operations, horctakeover command will be
returned with SVOL_E (execute SVOL-takeover and return
EX_VOLCUR) on the (DC2) side.
Æ state is No. 15.
As for other case:
If the DC2 takes over processing from the DC1 on processing
paircreate operation, horctakeover command will be
returned with EX_ENQVOL (Unmatch volume status on the
group) due to the group’s volume attribute is not the same
on each volume ((DC2)SMPL & (DC2)SVOL) on the (DC2)
side.
In this case, pairvolchk (-s) command will be returned with
EX_ENQVOL on the (DC2) side.
Host A
SVOL
COPY
DC2
Host B
PVOL
COPY
DC1
State No. 15
paircreate -vl
As for other case in state No. 16:
If the DC2 takes over processing from the DC1 without
pairevtwait (-s pair) operations, horctakeover command
will be returned with SVOL_E (execute SVOL-takeover and
return EX_VOLCUR) due to the group’s volume attribute is
not the same on each volume ((DC2)SVOL_PAIR &
(DC2)SVOL_COPY) on the (DC2) side.
In this case, pairvolchk (-s) command will be returned with
SVOL_COPY on the (DC2) side.
Host A
SVOL
PAIR/
COPY
DC2
Host B
PVOL
PAIR/
COPY
DC1
State No. 16