HP XP Continuous Access Software - Manual (Page 64)

64 HP StorageWorks Disk Array XP RAID Manager: User’s Guide
Paired BC volume status definitions
Each pair of BC volumes consists of a primary volume (P-VOL) and
secondary volume (S-VOL). Each volume maintains its own pair status.
The major BC pair statuses are:
• SMPL
• PAIR
• COPY
• RCPY
• PSUS
• PSUE
The P-VOL controls the pair state that is typically reflected in the status of
the S-VOL. The status can be changed when a RM command is issued. A
read or write request from the host is allowed or rejected according to the
status, as shown in the following figure.
Caution
Terminology and functionality differ somewhat between the RM CLI
interface and the RC GUI interface. For instance:
• The terms “suspend” and “split” may have opposite meanings
• S-VOL read/write options while suspended may differ
• The GUI allows you to choose/force a PSUE state
For more detail, refer to the following manuals (XP48/XP512 only):
HP StorageWorks Business Copy XP: User’s Guide
HP StorageWorks Continuous Access XP: User’s Guide
Note that reading the BC S-VOL in any state except PSUS is “at your own
risk.” Data in any state except PSUS is likely to be inconsistent and not
current.