HP XP P9500 Storage - Manual (Page 12)

2 Requirements and planning
This chapter describes system requirements and recommendations for planning a BC system.
System requirements
The following table shows minimum requirements for BC.
Requirement Item
Based on purchased capacity. For more information, see “License capacity requirements”
(page 13) .
BC license capacity
Must be installed. License key
For more information about installation, see the HP XP P9000 Remote Web Console User
Guide.
RAID 1, RAID 5, RAID 6 RAID level
If you are using the previous version of RWC, which is shown in a secondary window,
you must be in Modify mode to perform pair operations. RWC
Requires a command device when used in In-Band mode, though not for Out-of-Band
mode. RAID Manager
For more information, see the HP XP P9000 RAID Manager User Guide.
Pair volumes • Number of P-VOLs per S-VOL: one
•
Number of S-VOLs per P-VOL:
For L1 pairs, a maximum of three S-VOLs per P-VOL.
For L2 pairs, a maximum of two S-VOLs per P-VOL.
(For information on pair-layers, see “Cascaded pairs” (page 8) ).
•
Volume Capacity: P-VOL and S-VOLs must have the same capacity.
• Supported volume types:
- Internal system volumes.
- External volumes. External Storage (Ext Stor) license required.
- Custom-sized volumes. VLL required. Pair volumes must have same capacity and
emulation type.
- LUSE volumes require LUSE license. BC S-VOLs must have the same size and structure
as the P-VOL. For example, if the P-VOL is a LUSE volume in which volumes of 1 GB,
2 GB, and 3 GB are combined in this order, the S-VOL must also be a LUSE volume
with volumes of 1 GB, 2 GB, and 3 GB combined in the same order.
•
MU number (mirror unit number):
- For an L1 pair, use 0, 1, or 2.
- For an L2 pair, use 1 or 2.
•
Sharing volumes with other software products is supported. See “Sharing Business
Copy volumes” (page 23) .
• The following cannot be used as pair volumes:
- Continuous Access Journal (Cnt Ac-J) journal volumes.
- Virtual volumes (except Thin Provisioning volumes).
- Pool volumes.
Per storage system: 16,384 pairs (when one S-VOL per P-VOL). Actual number is based
on amount of additional shared memory. See
“Planning number of pairs” (page 13) for
further information.
Maximum number of pairs
12 Requirements and planning