2 global copy for migration using the ds cli, 1 migration procedure steps – IBM DS6000 User Manual

Page 265

Chapter 21. Global Copy examples

241

SSID(0002) MODE(COPY)

6. The final task was to reestablish Global Copy for the volume pairs; see Example 21-8.

Example 21-8 Restart Global Copy

CESTPAIR DEVN(X'6030') PRIM(X'2060' AAGXA X'30' X'00') -
SEC(X'0002' AAVCA X'30' X'00') -
OPTION(XD) MODE(RESYNC)
CESTPAIR DEVN(X'6031') PRIM(X'2060' AAGXA X'31' X'00') -
SEC(X'0002' AAVCA X'31' X'00') -
OPTION(XD) MODE(RESYNC)

21.2 Global Copy for migration using the DS CLI

In this example, we show how to use DS CLI commands and scripts to migrate volumes from
an ESS 800 to a DS6000 using Global Copy. In the example, we have only two volumes. In
reality, you would perform the steps for a larger number of volumes. In that case, DS CLI
scripts are particularly useful because the commands can be written in advance and modified
if necessary. Our example also shows the strength of the DS CLI in the management of CKD
copy operations.

In the example, the source volumes are

050A

and

050B

on LSS

of the ESS 800

IBM.2105-22399

. The target volumes are

023A

and

023B

on LSS

of the DS6000

IBM.1750-1300247

The Web Copy Services commands for S/390 volumes ESS Control Switch has to be
enabled on the ESS-800; otherwise, the DS CLI cannot be used to establish CKD volume
pairs. If the control switch is disabled, the following message is issued:

CMUN03013E mkpprc:

CKD

management is disabled

. Contact your IBM service representative to enable the control

switch. The control switch change should be followed by restart of the ESS Copy Services
server.

21.2.1 Migration procedure steps

To use CLI commands and scripts to migrate volumes from an ESS 800 to a DS6000 with
Global Copy, we followed this procedure.

1. We checked the WWNN of the target DS6000 system. Using the DS CLI in one-shot

mode, we issued the

lssi

command; see Example 21-9. Profile

ds6-00247.prf

contains

the necessary logon information for the DS6000 target system.

Example 21-9 Check target WWNN

C:\IBM\DSCLI>dscli -cfg ds6-00247.prf lssi
Date/Time: November 22, 2005 4:01:06 PM EET IBM DSCLI Version: 5.1.0.204
Name ID Storage Unit Model WWNN State ESSNet
============================================================================
- IBM.1750-1300247 IBM.1750-1300247 511 500507630EFFFE16 Online Enabled

2. We checked which FCP ports were available for establishing paths between LSS

the ESS 800 and LSS

on the DS6000. We used the DS CLI in one-shot mode to issue

the

availpprcport

command; see Example 21-10 on page 242. Profile ess-22399.prf

contains the necessary logon information for the ESS 800 source system.