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200 Chapter 4 Performing CCI Operations
Table 4.16 State Transition Table for HA Control Script
Volume Attributes and Pair Status Results Executing pairvolchk and horctakeover from DC1(DC2)
State
No.
DC1(DC2) DC2(DC1) pairvolchk -s
(local volume)
pairvolchk -s -c
(remote volume)
Pair
Status
Horctakeover
result
1 SMPL SMPL SMPL EX_VOLCRE
2 COPY
3 PAIR/PFUL
4 PSUS
4-1 PFUS
5 PSUE
6
P-VOL
PDUB
PVOL_XXX XXX Nop
8 S-VOL EX_EVOLCE
EX_EVOLCE
9
SMPL
or
SVOL-
PSUS
(SSWS)
Unknown
SMPL
or
SVOL-PSUS
EX_ENORMT or
EX_CMDIOE
(EX_ENORMT)
(EX_CMDIOE)
10 SMPL SMPL XXX EX_VOLCRE
11
P-VOL
P-VOL EX_EVOLCE
EX_EVOLCE
data or
status &
PSUE or
PDUB
PVOL-PSUE Æ12
or PVOL-SMPL Æ8
12
Other
S-VOL SVOL_YYY XXX
Nop
data or
status &
PSUE or
PDUB
PVOL-PSUE Æ13
or PVOL-SMPL Æ9
13
Other
Unknown
PVOL_XXX
EX_ENORMT or
EX_CMDIOE
XXX
Nop
14 SMPL EX_EVOLCE
EX_EVOLCE
15 COPY SVOL_E* Æ 4,5
SVOL_E*
16 PAIR/
PFUL
Swap Æ12
PSUS SVOL_E Æ 4 17
PFUS
SVOL_YYY
SVOL Æ 4-1
18
S-VOL
P-VOL
PSUE data
PVOL_XXX XXX
SVOL Æ 5,6