HP NonStop G-Series - Manual (Page 22)

ServerNet Nomadic Disk Overview
ServerNet Nomadic Disk (Release 2) User’s Guide — 523968-001
1 -4
Data Paths and Disk Drive Ownership After a
Switchover
•
Thinner lines indicate inactive data paths that run between the backup node \BCK
and the primary and mirror disk drives.
Data Paths and Disk Drive Ownership After a Switchover
To manage outages, both the primary disk drives and remotely located mirror disk
drives can be switched to the backup node. When a outage brings down the primary
node, the ownership of the disk drives can be switched to \BCK. After a switchover, the
active data paths are as shown in
Figure 1-2 .
•
The thick solid lines designate active data paths, which are between the backup
node and the primary and mirror disk drives. The primary disk drives, which are
located with the primary node \PRI, are now owned by the backup node \BCK. The
mirror disk drives are also now owned by the backup node.
•
The thinner lines indicate inactive data paths, which run between the primary node
and the primary and mirror disk drives.