HP XP Command View Advanced Edition Software - Manual (Page 36)

Preparing for and Starting Operations 36
Table 4-2 Requirements for a logical device to be selectable as a secondary volume
Storage subsystem Requirements for a logical device to be selectable as a secondary volume
StorageWorks
XP12000/XP10000* Common conditions
for copy pairs • The logical device must be applicable to StorageWorks XP Disk
Array.
• The emulation type must be the same as that of the selected
primary volume.
• For a LUSE volume, the primary volume and secondary volume
must have the same number of logical devices that make up the
LUSE.
• For an internal volume mapped to an external volume, the host I/O
suppression mode must be disabled.
Conditions for
Continuous Access
XP Synchronous and
Continuous Access
XP Extension
• The primary volume must belong to the MCU, and the secondary
volume must belong to the RCU registered in that MCU.
• The logical device must not be a primary volume or secondary
volume for Continuous Access XP Journal. For Continuous Access
XP Synchronous, a Continuous Access XP Journal primary volume
can be used as a secondary volume for Continuous Access XP
Synchronous.
The logical volume must not be a primary volume, V-volume, or data
pool for Snapshot XP.
Condition for
Business Copy XP
The logical volume must not be a primary volume, V-volume, or data
pool for Snapshot XP.
StorageWorks
XP1024/XP128 and
StorageWorks
XP512/XP48 Common conditions
for copy pairs • The logical device must be applicable to StorageWorks XP Disk
Array.
• The emulation type must be the same as that of the selected
primary volume.
• For a LUSE volume, the primary volume and secondary volume
must have the same number of logical devices that make up the
LUSE.
Condition for
Continuous Access
XP Synchronous and
Continuous Access
XP Extension
The primary volume must belong to the MCU, and the secondary
volume must belong to the RCU registered in that MCU.
* If you cascade with pairs other than Snapshot XP pairs, first create the copy pair in the upper level. For example, suppose
you use LDEV1, LDEV2, and LDEV3 to create the pairs of the P-VOL LDEV1 and the S-VOL LDEV2, and also the P-VOL
LDEV2 and the S-VOL LDEV3, and then cascade them. In this case, first create the pair of the P-VOL LDEV1 and the S-
VOL LDEV2.
4-3-3 Requirements for RAID Levels
Requirements for the RAID level of copy pair volumes differ depending on the storage subsystem or copy type.
Table 4-3 shows the combinations of the RAID levels of copy pair volumes.
Table 4-3 Combinations of RAID levels of copy pair volumes
Copy Type Storage subsystem
StorageWorks
XP12000/XP10000
StorageWorks XP1024/XP128
and StorageWorks XP512/XP48
Continuous Access XP Any combination of RAID1,
RAID5 and RAID6
Any combination of RAID1 and
RAID5
Business Copy XP Any combination of RAID1,
RAID5 and RAID6 Any combination of RAID1 and
RAID5
4-4 Logging In to Device Manager
After you have installed Device Manager and prepared for operations as described in sections 4-1 , 4-2 , and 4-
3 , you can log in.