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Chapter 29. Interoperability between DS6000 and ESS 800 439
Example 29-4 Using ESS CLI to list CKD volumes
C:\Program Files\ibm\ESScli>esscli -u copy -p serv1ces -s 9.155.51.237 list volume
Wed Nov 09 04:07:52 EST 2005 IBM ESSCLI 2.4.0
Volume Cap Units VolType LSS VS Serial Label
------ ----- ----- ------- --- ---- -------- -----
0500 3339 Cyls 3390 05 vs6 *** ***
0501 3339 Cyls 3390 05 vs6 *** ***
0502 3339 Cyls 3390 05 vs6 *** ***
0503 3339 Cyls 3390 05 vs6 *** ***
29.2.8 Volume address considerations on the ESS 800
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. When referring to
them in the DS CLI, you must add 1000 to the volume ID, so volume 000-22399 is volume ID
1000 and volume 001-22399 is volume ID 1001. This is very important because on the ESS
800, the following address ranges are actually used:
0000 to 0FFF CKD volumes (4096 possible addresses)
1000 to 1FFF Open systems fixed block LUNs (4096 possible addresses)
If we intend to use FlashCopy to copy ESS open systems LUN 000-22399 onto 001-22399
using DS CLI, we must specify 1000 and 1001. If instead, we specify 0000 and 0001, we
actually run the FlashCopy against CKD volumes. This might result in an unplanned outage
on the System z environment that was using CKD volume 0001.
29.3 RMC: Establishing paths between DS6000 and ESS 800
To create a PPRC relationship between a DS6000 and an ESS 800, you first must create
logical paths (over the physical Fibre Channel connections). If you are using the DS GUI, then
provided you added the ESS Copy Services Domain to the DS6000, you can establish paths
in either direction (ESS 800 to DS6000 or DS6000 to ESS 800). If the ESS Copy Services
domain was not added, then paths can only be established where the DS6000 is the source.
29.3.1 Decoding port IDs
When viewing port IDs in the DS GUI or DS CLI, you can decode the IDs to show which
physical port on the DS6000 or ESS 800 is in use. For DS6000, port IDs range from I0000 to
I0001 and I0100 to I0103. These break out as IEECP. The EE is the controller number (00 or
01), C is the card slot number (always 0), and P is the port number on the card (0 to 3). So
I0103 is controller 1, card slot 0, port 3.
The ESS 800 port IDs do not follow the same rule. To decode them, take the last two digits in
the port ID and then use Figure 29-3 on page 440. So port ID I0020 is the adapter in host bay
2, slot 1 and port ID I00AC is the adapter in host bay 4, slot 4.
Note: You cannot use the DS CLI to check volume sizes on an ESS 800. You must either
use the ESS Specialist or the ESS CLI.