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Multi Hop SRDF using Raid-5 Devs
I am attempting to setup a multi-hop between 3 DMX-2's all 5671 code for migration and DR purposes.
Site 1, symm 1, R1 devs SRDF/Asynchronous to :
Site 2, symm 2, R2 dev
then i'm setting up R1/BCVs, established to above R2 devs, with SRDF/A link to:
Site2, symm 2, R2 devs, with Gold copy BCV's
the problem i get when using manual groups is that after i mirror the R1/BCVS to the R2s in site 2, when i go to re-establish my link , i get the message "cannot use the device for theis function because it is a Copy Session Target"
Can this be done with all Raid-5 devices. I've studied the pictures in SE 6.4 guide, pg 133 but's it's pretty confusing. Will the use of a single device group elimenate the copy session target error?
thanks
Site 1, symm 1, R1 devs SRDF/Asynchronous to :
Site 2, symm 2, R2 dev
then i'm setting up R1/BCVs, established to above R2 devs, with SRDF/A link to:
Site2, symm 2, R2 devs, with Gold copy BCV's
the problem i get when using manual groups is that after i mirror the R1/BCVS to the R2s in site 2, when i go to re-establish my link , i get the message "cannot use the device for theis function because it is a Copy Session Target"
Can this be done with all Raid-5 devices. I've studied the pictures in SE 6.4 guide, pg 133 but's it's pretty confusing. Will the use of a single device group elimenate the copy session target error?
thanks
rawstorage
4 Apprentice
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423 Posts
251
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Posted September 26th, 2008 07:00
WilsonG,
From the RDF Product Guide, this is a documented restriction (section: Setting Snap and Clone devices to Asynchronous mode):
"Note: If the R2 device is a source or target of a snapshot operation, asynchronous mode will not be allowed."
You are using RAID5 BCV,therefore Clone Emulation is enabled.
R1---R2---R1/R5BCV------R2----R5BCV
|
Can't establish this link here as R2 is Clone source to R5BCV, you could possibly use adaptive copy disk mode here to get around this.
SKT2
2 Intern
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1340 Posts
251
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Posted September 23rd, 2008 10:00