Hitachi TAGMASTORE MK-90RD011-25 - Manual (Page 241)

Hitachi Command Control Interface (CCI) User and Reference Guide 223
4.10.1 Horctakeover Command Functions
4.10.1.1 Takeover-Switch Function
The control scripts activated by the HA software are used the same way by all nodes of a
cluster; they do not discriminate between primary and secondary volumes. The takeover
command, when activated by a control script, checks the combination of attributes of the
local and remote volumes and determines the proper takeover action. Table 4.23 lists the
volume attributes and specifies the TrueCopy takeover action for each combination of
attributes.
Table 4.23 Volume Attributes and Takeover Actions
Local Node (Takeover Node) Remote Node
Volume Attribute Fence Level and Status Volume Attribute P-VOL Status Takeover Action
SMPL - SMPL - NG [1]
P-VOL - Nop-Takeover [2]
S-VOL - Volumes not conform [3]
Unknown [4] - NG
SMPL - NG
P-VOL - Volumes not conform
S-VOL - PVOL-Takeover
Fence = Data or Status
and
Status = PSUE or PDUB
or MINAP = 0
Unknown Status
(e.g., LAN down)
- PVOL-Takeover
SMPL - NG
P-VOL - Volumes not conform
S-VOL - Nop-Takeover
P-VOL
(primary)
Fence = Never
Status = others
Unknown Status
(e.g., LAN down)
- Nop-Takeover
Status = SSWS [5]
After SVOL_SSUS-takeover
Any - Nop-Takeover
SMPL - Volumes not conform
P-VOL PAIR or PFUL Swap-Takeover
Others SVOL-Takeover
S-VOL - Volumes not conform
S-VOL
(secondary)
Others
Unknown - SVOL-Takeover