User's Guide

ensure that any reads on the R1 side will be current, by reading data through the SRDF link
from the R2 side.
NOTE: If the system administrator does not want synchronization performed from the remote
(recovery) site, the device groups should be split and recreated manually.
5. Ensure that the monitor packages at the primary and recovery sites are running.
6. Verify device group is synchronized.
# symrdf list
7. Manually failback the device group if the package does not come up, and the device group
status is "Failed Over".
# symrdf -g pkgCCB_r1 failback
Execute an RDF ’Failback’ operation for device
group ’pkgCCB_r1’ (y/[n]) ? y
An RDF ’Failback’ operation execution is
in progress for device group ’pkgCCB_r1’. Please wait...
Write Disable device(s) on RA at target (R2)..............Done.
Suspend RDF link(s).......................................Done.
Merge device track tables between source and target.......Started.
Device: 001 ............................................. Merged.
Merge device track tables between source and target.......Done.
Resume RDF link(s)........................................Done.
Read/Write Enable device(s) on SA at source (R1)..........Done.
The RDF ’Failback’ operation successfully executed for
device group ’pkgCCB_r1’.
8. During the resync; the status goes from failed over > invalid > SyncInProg.
Example:
ftsys1a# symrdf list
Symmetrix ID: 000183500021
Local Device View
------------------------------------------------------------------------
STATUS M O D E S RDF S T A T E S
Sym RDF --------- ------------ R1 Inv R2 Inv-----------------------
Dev RDev Typ:G SA RA LNK Mode Dom ACp Tracks Tracks Dev RDev Pair
--- ---- ----- --------- ------------ ------ ------ --- -----------------
000 000 R2:2 RW WD RW SYN DIS OFF 0 0 WD RW Synchronized
001 001 R2:2 RW WD RW SYN DIS OFF 12 0 WD WD Invalid
ftsys1a# symrdf list
Symmetrix ID: 000183500021
Local Device View
----------------------------------------------------------------------------
STATUS M O D E S RDF S T A T E S
Sym RDF --------- ------------ R1 Inv R2 Inv ----------------------
Dev RDev Typ:G SA RA LNK Mode Dom ACp Tracks Tracks Dev RDev Pair
--- ---- ----- --------- ------------ ------ ------ --- ----------------
000 000 R2:2 RW WD RW SYN DIS OFF 0 0 WD RW Synchronized
001 001 R2:2 RW WD RW SYN DIS OFF 2 0 WD RW SyncInProg
9. Halt the target disk site and restart it.
# cmhaltcl -f (if the cluster is not already down)
306 Building Disaster Recovery Serviceguard Solutions Using Metrocluster with EMC SRDF