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