HP XP Continuous Access Software User Manual
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HP StorageWorks Disk Array XP RAID Manager: User’s Guide
SVOL-SSUS-takeover in the case of ESCON/FC link and host
failure
An SVOL-Takeover executes an SVOL-SSUS-takeover so that S-VOL
writing is enabled without going to SMPL state. An SVOL-SSUS-takeover
changes the secondary volume to suspend (PAIR, PSUE
→
SSUS) state,
which permits WRITE and delta data maintenance (BITMAP) for all
secondary volumes of the group.
Terms:
PAIR*
Equivalent to PAIR for sync-CA.
Equivalent to PAIR
→
PSUE for async-CA.
SSUS
Equivalent to SVOL_PSUS.
Group status after a SVOL-SSUS-takeover
After an SVOL-SSUS-takeover completes:
• The S-VOL status is displayed as SSUS by the pairdisplay command.
• The pairvolchk command returns the S-VOL status as SVOL_PSUS.
Also, this special state is displayed as SSWS by using the –fc option of the
pairdisplay
command. This special state (PVOL_PSUE and
Host C
Host A
Host B
PAIR
PSUE
PAIR
PAIR
PAIR
SSUS
SSUS
SSUS
SSUS
SSUS
horctakeover
P-VOL
ESCON & Host failer
Host C
Host A
Host B
PAIR
PSUE
PAIR
PAIR
PAIR
PAIR*
PAIR*
PAIR*
PAIR*
PAIR*
S-VOL
P-VOL
S-VOL
ESCON/FC & Host Failure