IBM System storage DS6000 Series, Redbook

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IBM System Storage DS6000 Series: Copy Services with IBM System z
DS CLI commands
Example D-3 shows the translation to a DS CLI command.
Example: D-3 DS CLI mkflash
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
See Figure D-3 for the GUI output.
Figure D-3 ESS GUI FlashCopy window
ESS / DS CLI comparison
Table D-2 shows a brief comparison of the major components between the ESS CLI and the
DS CLI.
TargetServer 2105.23953 N/A used only once in DS
CLI
Source and Target
vols. 1004 1005 1004:1005 separated by a colon in
DS CLI
Important: On the ESS 800, open systems volume IDs are given in an eight-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 that 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 System z CKD volumes (4096 possible addresses)
1000 to 1FFF Open systems fixed block LUNs (4096 possible addresses)
If you intend to FlashCopy ESS LUN 004-23953 onto 005-23953 with the DS CLI, you
must specify 1004 and 1005. If instead, you specify 0004 and 0005, you will actually run
the FlashCopy against CKD volumes. This can result in an unplanned outage on the
System z host that is using CKD volume 0005.
The ESS CLI command,
show task
, shows the correct value for the volume ID.
Task parameter ESS CLI parameter DS CLI conversion Description