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Shadowimage for mainframe options, Swap&freeze option – HP XP Business Copy Software User Manual

Page 25

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Table 3 Pair Status and Allowable Operations (continued)

Pair Status

Operation

Suspend

Resync-R

Resync

Split

V-Split

SP-Pend

Duplex

Pending

Simplex

Yes

NG

NG

1

Yes

Yes

NG

NG

1

NG

NG

Resync
Pair
(forward)

NG

NG

NG

Yes

NG

NG

NG

NG

NG

Resync
Pair
(backward)

Yes

Yes

Yes

Yes

NG

Yes

Yes

Yes

NG

Delete
Pair

1

There are the following cases:

If you try to resynchronize a pair in duplex or resync status by copying data from the S-VOL to the T-VOL using PPRC
TSO command, the processing ends normally. However, since actually no resynchronize processing is performed,
the pair status does not change.

If you use ICKDSF PPRCOPY command, the command abnormally ends by reporting CC = 12.

If you use XP for Business Continuity Manager Software™, the processing ends normally. However, since no

resynchronize processing is performed as in case 1, the pair status does not change. For further information about

how to use XP for Business Continuity Manager Software™, see the HP StorageWorks XP for XP for Business

Continuity Manager Software™ Software User's Guide.

ShadowImage for Mainframe Options

You can use the options in

Table 4 (page 25)

for SIz operations.

Table 4 Types of ShadowImage for Mainframe Options

Requirement

Features

Option Type

You must change the storage system setting to
allow the quick restore operation.

Swap&Freeze option suppresses the update
copy. For details, see

“Swap&Freeze Option”

(page 25)

.

Swap&Freeze

N/A

Host I/O Performance option suppresses the
copy operations by ShadowImage for
Mainframe. For details, see

“Host I/O

Performance Option” (page 26)

.

Host I/O Performance

N/A

Copy Threshold option temporarily stops the
copy operation of ShadowImage for
Mainframe. For details, see

“Copy Threshold

Option” (page 27)

.

Copy Threshold

NOTE:

Available option types depend on the storage system settings.

Swap&Freeze Option

The Swap&Freeze option allows the S-VOLs of an SIz pair to remain unchanged after the quick
restore operation. If the quick restore operation is performed on an SIz pair with the Swap&Freeze
option, update copy operations are suppressed, and thus are not performed for pairs in the duplex
status after the quick restore operation. If the quick restore operation is performed without the
Swap&Freeze option, the S-VOL and T-VOL are resynchronized when update copy operations are
performed for pairs in the Duplex status.

Make sure that the Swap&Freeze option remains in effect until the pair status becomes Duplex after
the quick restore operation.

ShadowImage for Mainframe Options

25

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