Preparing For Bc Operations; System Requirements; Identifying The Volumes For Bc Operations - HP StorageWorks XP10000 User Manual

Preparing for BC operations

System requirements

BC operations involve the disk array containing the primary and secondary volumes and the licensed BC
feature enabled on the Command View XP management station or XP Remote Web Console. System
requirements for BC are:
• Disk array hardware, microcode, and software required for BC operations must be installed and
enabled.
• Command View XP management station (user-supplied Windows-based PC) or XP Remote Web
Console.
• BC license key installed.
Preparing for BC operations
To ensure that you and your disk arrays are ready for BC operations, perform the following tasks:
• BC operations affect I/O performance of the disk array because of copy operations to the S-VOLs. If
you have not already done so, consider the relative importance of the disk array's I/O performance
and the BC backup copies. For example, assigning three S-VOLs to each P-VOL takes more resources
than assigning one or two. You can also use the copy pace option to control the impact of BC initial
copy operations. Using a slower copy pace minimizes the impact of BC operations on I/O
performance, while a faster copy pace produces copies more quickly, but may affect I/O performance.
• If you are using more than one disk array data management feature (such as BC,
or Cache LUN) at the same time in the same disk array, contact your HP account support representative
to ensure that your disk array is optimized for your configuration of concurrent operations. Each disk
array feature can affect disk array performance and/or operation of other features. For example, BC
and
Continuous Access XP
secondary/remote volumes in addition to host I/O workload.
• Identify the volumes (LUs) you will use for BC operations. For each volume, write down the full SCSI
path (port, target ID (TID), and LUN), whether the volume will be a P-VOL or S-VOL, and the other
volumes in its pair (see
will be P-VOLs remain fully accessible to all hosts throughout normal BC operations, but volumes that
will be S-VOLs must be unmounted before being reserved for BC operations.
Table 16

Identifying the volumes for BC operations

CU Port
0 1A
0 1A
etc.
0 1B
0 1B
etc.
0 2A
0 2A
operations both involve initial copy and update copy operations to
Table 16 for a sample). LUN Manager displays this information. Volumes that
TID: L1 Assoc.
LUN P-VOL L1
S-VOLs
0:00 Yes 1B-0:00,
2A-0:00,
2B-0:00
0:01 Yes 1B-0:01,
2A-0:01,
2B-0:01
0:00 No —
0:01 No —
0:00 No —
0:01 No —
L1 Assoc. L2
S-VOL L1 P-VOL
P-VOL
No — No
No — No
Yes 1A-0:00 Yes
Yes 1A-0:01 Yes
Yes 1A-0:00 Yes
Yes 1A-0:01 Yes
Business Copy XP user guide for the XP10000/XP12000
Continuous Access XP
Assoc. L2 Assoc.
L2 S-VOL L2
S-VOLs P-VOL
— No —
— No —
3A-0:00, No —
3A-0:01
3B-0:00, No —
3B-0:01
4A-0:00, No —
3B-0:01
4B-0:00, No —
3B-0:01
,
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