Horctakeover Command Functions; Takeover-Switch Function - Hitachi AMS 2000 Reference Manual

Horctakeover command functions

ShadowImage and SnapShot does not support this command.

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 horctakeover command, when activated by a
control script, checks the combination of attributes of the local and remote
volumes and determines the proper takeover action.
volume attributes and specifies the TrueCopy takeover action for each
combination of attributes.
specifies the TCE takeover action for each combination of attributes.
•
Table 1-16: Volume Attributes and Takeover Actions (TrueCopy)
Local Node (Takeover Node)
Volume
Attribute
SMPL
P-VOL
(primary)
S-VOL
(secondary)
1–46
Hitachi AMS 2000 Family Command Control Interface (CCI) Reference Guide
Table 1-17
Fence Level and Volume
Status Attribute
- SMPL
P-VOL
S-VOL
Unknown
Fence = Data SMPL
and
P-VOL
Status = PSUE
S-VOL
Unknown
Status (that is
LAN down)
Fence = Never SMPL
or
P-VOL
Status = others
S-VOL
Unknown
Status (that is
LAN down)
Status = SSWS Any
[5]
After
SVOL_SSUS-
takeover
Others SMPL
P-VOL
S-VOL
Unknown
Performing CCI Operations
Table 1-16
lists the volume attributes and
Remote Node
P-VOL
Status
-
-
-
[4]
-
-
-
-
-
-
-
PAIR
Others
-
-
lists the
Takeover Action
[1]
NG
[2]
Nop-Takeover
Volumes not conform
[3]
NG
NG
Volumes not conform
PVOL-Takeover
PVOL-Takeover
NG
Volumes not conform
Nop-Takeover
Nop-Takeover
Nop-Takeover
Volumes not conform
Swap-Takeover
SVOL-Takeover
Volumes not conform
SVOL-Takeover