Check For Valid Consistency Group State - IBM System storage DS6000 Series Redbook

Note that this command just changes the state of the secondary volumes from
pending
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

Primary
Primary
Primary
A
Primary
Primary
PENDING
Local site
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
FCQUERY Formatted -2
DEVN SSID LSS CCA CU
6400 0002 00 00 1750 0000000AAVCA
FCQUERY COMMAND COMPLETED FOR DEVICE 6400. COMPLETION CODE: 00
FCQUERY
FCQUERY Formatted -2
DEVN SSID LSS CCA CU
6401 0002 00 01 1750 0000000AAVCA
FCQUERY COMMAND COMPLETED FOR DEVICE 6401. COMPLETION CODE: 00
FCQUERY
FCQUERY Formatted -2
DEVN SSID LSS CCA CU
6402 0002 00 02 1750 0000000AAVCA
FCQUERY COMMAND COMPLETED FOR DEVICE 6402. COMPLETION CODE: 00
FCQUERY
primary suspended
to . This command does not communicate to the other storage
A
A
DEVN (X'6400')
SERIAL
DEVN (X'6401')
SERIAL
DEVN (X'6402')
SERIAL
DEVN (X'6403')
Host
Check Consistency Group
Primary
Primary
Primary
B
Primary
Primary
SUSPENDED
Remote site
ACT MAX XC PC CC RV SEQNUM
1 50099 N S N N 42B03957
ACT MAX XC PC CC RV SEQNUM
1 50099 N S N N 42B03957
ACT MAX XC PC CC RV SEQNUM
1 50099 N S N N 42B03957
Chapter 23. Global Mirror options and configuration
secondary
FlashCopy
A
A
A
A
Primary
Primary
Primary
C
Primary
Tertiary
285