IBM DS6000 Series manual Converting a FlashCopy task to DS CLI

Table 10-3 Converting a FlashCopy task to DS CLI

ESS CS CLI	Saved task	DS CLI coversion	Explanation
parameter	parameter
Tasktype	FCEstablish	mkflash	An FCEstablish becomes a
			mkflash.
Options	NoBackgroundCopy	-nocp	To do a FlashCopy no-copy
			we use the -nocp parameter.
SourceServer	2105.23953	-dev IBM.2105-23953	The format of the serial
			number changes. you must
			use the exact syntax.
TargetServer	2105.23953	N/A	We only need to use the
			-dev once, so this is
			redundant.
Source and Target vols	1004 1005	1004:1005	The volume numbers don’t
			change. We simply separate
			them with a full colon.

So to create the DS CLI command, simply read down the third column:

mkflash -nocp -dev IBM.2105-23953 1004:1005

Important: On the ESS 800, open systems volume IDs are given in an 8 digit format, xxx-sssss where xxx is the LUN ID and sssss is the serial number of the ESS 800. In the example used in this appendix the volumes shown are 004-23953 to 005-23953. These volumes are open systems, or fixed block volumes. When referring to them in the DS CLI, you must add 1000 to the volume ID, so volume 004-23953 is volume ID 1004 and volume 005-23953 is volume ID 1005. This is very important because on the ESS 800, the following address ranges are actually used:

0000 to 0FFF	CKD z/Series volumes (4096 possible addresses)
1000 to 1FFF	Open systems fixed block LUNs (4096 possible addresses)

If we intend to use FlashCopy to copy ESS LUN 004-23953 onto 005-23953 using DS CLI, we must specify 1004 and 1005. If instead we specify 0004 and 0005, we will actually run the FlashCopy against CKD volumes. This may result in an unplanned outage on the zSeries system that was using CKD volume 0005.

The ESS CLI command, show task, will show the correct value for the volume ID

In Example 10-14the user uses the DS CLI interactive mode. They issue the mkflash command and then use lsflash to check the success of the command.

Example 10-14 Using interactive dscli mode without profiles

sharon@aixsrv:/opt/ibm/dscli		> dscli
dscli> mkflash -nocp -dev IBM.2105-23953 1004:1005
CMUC00137I mkflash: FlashCopy pair			1004:1005 successfully created.
dscli> lsflash -dev IBM.2105-23953			1004:1005
ID	SrcLSS SequenceNum	Timeout ActiveCopy Recoding Persistent Revertible

===============================================================================

1004:1005 10	0	120	Disabled	Disabled Disabled	Disabled
dscli>

212DS6000 Series: Concepts and Architecture