IBM DS6000 - Manual (Page 309)

Chapter 23. Global Mirror options and configuration 285
Note that this command just changes the state of the secondary volumes from
secondary
pending
to
primary suspended
. This command does not communicate to the other storage
disk subsystem at all, even though it is specified in the SEC parameter of the command.
Once all the Failover commands are successfully executed, we can move on to the next step.
23.7.4 Check for valid Consistency Group state
Figure 23-12 Check Consistency Group state
Now you have to investigate whether all FlashCopy relationships are in a consistent state;
see Figure 23-12. This means you have to query all FlashCopy relationships between B and
C, which are part of the Consistency Group, to determine the state of the FlashCopy
relationship. Global Mirror might have been in the middle of forming a Consistency Group and
FlashCopy may not have completed the creation of a complete set of consistent C volumes.
Each FlashCopy pair needs a FlashCopy query to identify its state. Example 23-5 shows
FlashCopy query commands of four FlashCopy source volumes (B volumes).
Example 23-5 FlashCopy query of four FlashCopy relationships
TIME-09:36:44 AM. CPU-00:00:00 SERVICE-68 SESSION-00:00:00 JUNE 15,2005
READY
FCQUERY DEVN (X'6400')
FCQUERY Formatted -2
DEVN SSID LSS CCA CU SERIAL ACT MAX XC PC CC RV SEQNUM
6400 0002 00 00 1750 0000000AAVCA 1 50099 N S N N 42B03957
FCQUERY COMMAND COMPLETED FOR DEVICE 6400. COMPLETION CODE: 00
FCQUERY DEVN (X'6401')
FCQUERY Formatted -2
DEVN SSID LSS CCA CU SERIAL ACT MAX XC PC CC RV SEQNUM
6401 0002 00 01 1750 0000000AAVCA 1 50099 N S N N 42B03957
FCQUERY COMMAND COMPLETED FOR DEVICE 6401. COMPLETION CODE: 00
FCQUERY DEVN (X'6402')
FCQUERY Formatted -2
DEVN SSID LSS CCA CU SERIAL ACT MAX XC PC CC RV SEQNUM
6402 0002 00 02 1750 0000000AAVCA 1 50099 N S N N 42B03957
FCQUERY COMMAND COMPLETED FOR DEVICE 6402. COMPLETION CODE: 00
FCQUERY DEVN (X'6403')
FlashCopy
Primary
Primary
A
Primary
Primary
A
Tertiary
C
Primary
Primary
A
Primary
Primary
A
B
Host
Remote site
Primary
Primary
A
Primary
Primary
A
Primary
A
PENDING
Primary
SUSPENDED
Check Consistency Group
Local site