Defining copy pools

You can define and maintain your copy pool definitions by selecting option P Copy Pool -

Specify Pool Storage Groups for Copies (enter P at the prompt) from the ISMF Primary

Copy pool applications

The Copy Pool Application Selection panel displays as shown in Figure 3-3. We choose option 3 Define - Define a Copy Pool.

Figure 3-3 Copy Pool Application Selection panel

The Copy Pool Define panel displays, as shown in Figure 3-4 on page 34. You can request additional copies on tape that will be created during the automatic dump of DFSMShsm by specifying Y in the Auto Dump field. You are required to populate at least one of the Dump Class fields in this case. If you do not want processing of the copy pool backups during the automatic dump, specification of dump classes is optional.

A good idea is to specify one or more dump classes in the copy pool definition because you can request additional copies on tape by using the FRBACKUP command at any time. The backup version must exist. If you do not define a dump class here, you must specify the dump class on the FRBACKUP command.

COPY POOL APPLICATION SELECTION Command ===> To perform Copy Pool Operations, Specify: CDS Name . . . . 'SYS1.SMS.SCDS' (1 to 44 character data set name or 'Active' ) Copy Pool Name CP1 (For Copy Pool List, fully or partially specified or * for all) Select one of the following options :

3 1. List - Generate a list of Copy Pools

2. Display - Display a Copy Pool 3. Define - Define a Copy Pool 4. Alter - Alter a Copy Pool If List Option is chosen, Enter "/" to select option Respecify View Criteria Respecify Sort Criteria Use ENTER to Perform Selection; Use HELP Command for Help; Use END Command to Exit.

Figure 3-4 Copy Pool Define panel (page 1 of 5)

You can specify the number of DASD fast replication backup versions with background copy that you want to keep of this copy pool. The default is two copies.

The number that you specify controls the maximum number of backup versions with background copy. If the requested number of backup versions already exists as a new FRBACKUP command occurs, the oldest backup version is rolled off.

If you use Metro Mirror for all volumes, you can request Preserve Mirror during fast replication backup and recovery. The resulting process is called a

remote pair FlashCopy

The field FRBACKUP to PPRC Primary Volumes allowed can be used to request remote pair FlashCopy during FRBACKUP. You can specify the following values:

NO PPRC primary volumes cannot be targets.

PN Metro Mirror primary volumes can be used as FlashCopy targets. Configuration requirements for Preserve Mirror are not considered.

PP Metro Mirror primary volumes can be FlashCopy target volumes. If the target volume is a Metro Mirror primary device, a Preserve Mirror operation is preferred.

PR If the FlashCopy target volume is a PPRC primary volume, the Preserve Mirror operation is required.

blank None specified. Blank is the default.

The field FRRECOV to PPRC Primary Volumes allowed can be used to request remote pair FlashCopy during FRRECOV. The values that you can specify are the same as with field FRBACKUP to PPRC Primary Volumes allowed.

COPY POOL DEFINE Page 1 of 5

Command ===> SCDS Name . . : SYS1.SMS.SCDS

Copy Pool Name : CP1 To DEFINE Copy Pool, Specify: Description ==> COPY POOL 1 ==> Auto Dump . . . N (Y or N) Dump Sys/Sys Group Name . . . Dump Class . . Dump Class . . Dump Class . . Dump Class . . Dump Class . . Number of DASD Fast Replication Backup Versions with Background Copy . . . 2 (0 to 85 or blank) FRBACKUP to PPRC Primary Volumes allowed . . . (NO, PN, PP, PR or blank) FRRECOV to PPRC Primary Volumes allowed . . . (NO, PN, PP, PR or blank) Use ENTER to Perform Verification; Use DOWN Command to View next Panel; Use HELP Command for Help; Use END Command to Save and Exit; CANCEL to Exit.

Catalog capture information

On the next panel of Copy Pool Define, as shown in Figure 3-5, you can request to capture the catalog information during the FRBACKUP of all data sets that are contained in the copy pool. During fast replication recovery processing, the saved catalog information will be used to recatalog data sets that were either deleted or moved. You must specify the names of all catalogs (up to ten) that contain entries for data sets on the copy pool volumes in field Catalog Name.

You can choose R (required), P (preferred), or N (none) in the field Capture catalog information for Data Set Recovery. The default is N, which disables capture catalog information during FRBACKUP. A setting of P (preferred) is best. Otherwise (if you request R), DFSMShsm does not tolerate any unresolved catalog information and fails the FRBACKUP processing when the catalog search interface returns an error. Heavily used catalogs often contain logical errors. Therefore, if you specify R, you might end up in a failing FRBACKUP processing even if only one catalog entry cannot be resolved.

Figure 3-5 Copy Pool Define panel (page 2 of 5)

You can request fast reverse restore during FRRECOV processing for later use by specifying

Y in the Allow Fast Reverse Restore field.

Important: Ensure that the catalogs are in the same pools as the data sets that are

described by the catalogs to support consistent catalog contents when a point-in-time recovery of a pool occurs.

For DFSMShsm fast replication recovery processing to recover a deleted or moved data set, user catalogs must exist on volumes that are defined in storage groups that are defined in the copy pool definition.

COPY POOL DEFINE Page 2 of 5

Command ===> SCDS Name . . : SYS1.SMS.SCDS Copy Pool Name : CP1 To DEFINE Copy Pool, Specify:

Catalog Name ==> UCAT.TESTFR ==> ==> ==> ==> ==> ==> ==> ==> ==> Capture Catalog Information for Data Set Recovery . . . P (R, P or N) Allow Fast Reverse Restore . . . Y (Y or N) Use ENTER to Perform Verification; Use UP/DOWN Command to View previous Panel; Use HELP Command for Help; Use END Command to Save and Exit; CANCEL to Exit.

With fast reverse restore, you can reverse the direction of an existing FlashCopy relationship and restore the source volume to the point-in-time state when it was last flashed to the target without waiting for the background copy to complete. Entering N disables fast reverse restore and requires you to wait for the original FlashCopy operation to complete before the recovery starts; this option is the default.

On the remaining panels of Copy Pool Define, you can specify the storage groups to include in the copy pool. Page 3 of 5 is shown in Figure 3-6.

You can specify up to 256 storage groups in a copy pool.

Figure 3-6 Copy Pool Define panel (page 3 of 5)