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• 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 affe
ct I/O performance.
• If you are using more than one disk array data management feature (such as BC, Continuous
Access XP, or Cache LUN) at the same time in the same disk array, contact your HP account
support re
presentative to ensure that your disk array is optimized for your configuration of
concurren
t operations. Each disk array feature can affect disk array performance and/or
operation of other features. For example, BC and Continuous Access XP operations both involve
initial copy and update copy operations to 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 Table 14 for a sample). LUN Manager displays this information.
Volumes that 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 14 Identifying the volumes for BC operations
CU
Port TID:
LUN
L1
P-VOL
Assoc.
L1
S-VOLs
L1
S-VOL
Assoc.
L1
P-VOL
L2
P-VOL
Assoc.
L2
S-VOLs
L2
S-VOL
Assoc.
L2
P-VOL
0
1A
0:00
Yes
1B-0:00,
2A-0:00,
2B-0:00
No
—
No
—
No
—
0
1A
0:01
Yes
1B-0:
01,
2A-0:
01,
2B-0:
01
No
—
No
—
No
—
etc.
0
1B
0:00
No
—
Yes
1A-0:00
Yes
3A-0:00,
3A-0:01
No
—
0
1B
0:01
No
—
Yes
1A-0
:01
Yes
3B-0:00,
3B-0:01
No
—
etc.
0
2A
0:00
No
—
Yes
1A-0:00
Yes
4A-0:00,
3B-0:01
No
—
0
2A
0:0
1
No
—
Yes
1A-0:01
Yes
4B-0:00,
3B-0:01
No
—
etc.
0
3A
0:00
No
—
No
—
No
—
Yes
1B-0:00
0
3A
0:
01
No
—
No
—
No
—
Ye
s
1B
-0:00
42
Business Copy XP (BC) for the Array