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The status change of a device when performing failover
As we all know when a failover operation was executed the R1 device was set to WD and R2 device was set to RW mode:
src# symrdf -g Rdf1Grp -noprompt failover
An RDF 'Failover' operation execution is in progress for device group 'Rdf1Grp'.
Please wait...
Write Disable device(s) on SA at source (R1)..............Done.
Suspend RDF link(s).......................................Done.
Read/Write Enable device(s) on RA at target (R2)..........Done.
The RDF 'Failover' operation successfully executed for device group 'Rdf1Grp'.
But I doesn't know what SA and RA here does as the above output ?
What's the use of SA and RA in the procedure of device status change?
Thx in advance.
src# symrdf -g Rdf1Grp -noprompt failover
An RDF 'Failover' operation execution is in progress for device group 'Rdf1Grp'.
Please wait...
Write Disable device(s) on SA at source (R1)..............Done.
Suspend RDF link(s).......................................Done.
Read/Write Enable device(s) on RA at target (R2)..........Done.
The RDF 'Failover' operation successfully executed for device group 'Rdf1Grp'.
But I doesn't know what SA and RA here does as the above output ?
What's the use of SA and RA in the procedure of device status change?
Thx in advance.
dynamox
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May 3rd, 2007 03:00
RA is the port used for SRDF/A replication.
dynamox
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May 3rd, 2007 16:00
cuihh
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May 3rd, 2007 16:00
Thanks for your explaination for the use of FA
What about the RA here?
Does it mean hypers status is changing to write enable on the RA ?
JasonBailey
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May 3rd, 2007 17:00
I must admit I have always been a little confused as to the difference between a write disable on the SA vs RA, and why one is done rather than the other. A good example being the output you displayed above you might expect it would change the RA status on both ends, rather than SA status on R1 and RA status on R2.
Anyway, I haven't had to dig into it that far, the symrdf composite commands do what they need to do in whatever situation.