Preparing for shadowimage operations, System requirements – HP XP Business Copy Software User Manual
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ShadowImage for the XP1024/XP128/XP12000/XP10000/SVS 200
Preparing for ShadowImage Operations
System Requirements
SI390 operations involve the XP1024/XP128/XP12000/XP10000/SVS 200 containing the S-VOLs and
T-VOLs, the SI390 feature enabled on the Command View management station or XP Remote Web
Console, and (optional) S/390 host PPRC software functions. The SI390 system requirements are:
•
XP1024/XP128/XP12000/XP10000/SVS 200. All XP1024/XP128/XP12000/XP10000/SVS 200
hardware, microcode, and software required for SI390 operations must be installed and enabled.
•
Command View management station (user-supplied Windows®-based PC) or XP Remote Web Console.
NOTE:
You must operate the Command View management station or XP Remote Web Console in
Modify mode to perform SI390 operations. Users in view mode can only view SI390 information.
•
SI390 feature license key installed.
Preparing for ShadowImage Operations
To ensure that the XP1024/XP128/XP12000/XP10000/SVS 200 is ready for SI390 operations, perform
the following tasks:
•
SI390 operations affect the I/O performance of the XP1024/XP128/XP12000/XP10000/SVS 200
because of the additional write operations to the T-VOLs. If you have not already done so, you should
consider the relative importance of the disk array’s I/O performance and the backup SI390 copies. For
example, assigning three T-VOLs to each S-VOL takes more resources than assigning only one or two.
You can also use the SI390 copy pace option to reduce the impact of the SI390 initial copy operations.
Using a slower copy pace minimizes the impact of zSeries and SI390 operations on I/O performance,
while a faster copy pace produces point-in-time copies more quickly but may affect I/O performance.
The SI390 initial copy operation is performed only once to each T-VOL (unless the pair is suspended).
•
Identify the volumes (LDEVs) that will be the SI390 volumes. For each volume, write down the CU image
and LDEV ID, whether the volume will be an S-VOL or T-VOL, and the other volume(s) in its pair (see
on page 38 for a sample table). The S-VOLs will remain fully accessible to all hosts throughout
normal SI390 operations (except during reverse resync and quick restore). The T-VOLs will need to be
varied offline before being reserved for SI390 operations. After assigned to a pair, a T-VOL rejects all
write I/Os, except when the pair is split.
•
SI390 and TC390 can function together in the same XP1024/XP128/XP12000/XP10000/SVS 200 to
provide both internal and remote backup for your important data. If you are planning to combine
SI390 and TC390, read the important configuration information in ”
Combining ShadowImage with Other Data Management Operations
SI390 supports concurrent operations with the following data management functions:
Table 9
Sample table for ShadowImage configuration information
CU #
LDEV
S-VOL?
Associated T-VOL(s)
T-VOL?
Associated S-VOL
0
00
Yes
0:10, 0:11
No
--
0
01
Yes
0:12, 0:13
No
--
etc.
…
…
…
…
…
0
0F
Yes
0:2E, 0:2F
No
--
0
10
No
--
Yes
0:00
0
11
No
--
Yes
0:00
0
12
No
--
Yes
0:01
etc.
…
…
…
…
…