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SSD drivers and SRDF setup
Here is one interesting scenario.SRDF setup with R1 and R2,ClonesC1,C2 on each side.Planning to use the host on C2-side to access the data on a dial basis to perform backups or to do some tests.
Since the LUN ID are more than 255 allocated on the FAs,Solaris host want to install the ssd drivers. Initial plan was to use sd.conf file to control which devices can be accessed by the servers(Either clones or Primary volumes).In this case since ssd driver discovers the storage dynamically,how would i be able to control,which device need to be accessed?Is there any static method?
Reason for doing that way is,If i mask primary and Clone volumes to FA then ssd will discover both but while importing the volume groups to solaris,it would get confused to which disks to use since both of them will have same Private regions.
Any thoughts/ ideas will be appreciated..
Since the LUN ID are more than 255 allocated on the FAs,Solaris host want to install the ssd drivers. Initial plan was to use sd.conf file to control which devices can be accessed by the servers(Either clones or Primary volumes).In this case since ssd driver discovers the storage dynamically,how would i be able to control,which device need to be accessed?Is there any static method?
Reason for doing that way is,If i mask primary and Clone volumes to FA then ssd will discover both but while importing the volume groups to solaris,it would get confused to which disks to use since both of them will have same Private regions.
Any thoughts/ ideas will be appreciated..
Allen Ward
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January 21st, 2009 13:00
We normally leave our R2s masked for DR activation. If we run a DR test we switch to masking the Clones. Once the test is completed we revert back to the R2s mapped. It's a bit of a pain to set up, but once it is it just needs to be maintained.
srichev
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January 21st, 2009 14:00
xe2sdc
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2.8K Posts
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January 22nd, 2009 00:00
1) map on more ports .. (map half of the devices on a couple of FA ports and another half on another pair of FA ports. If possible bring FA ports online/offline to filter devices. Otherwise change masking (!!!!) to filter devices.
2) map all devices on a single pair of port and use lun offsett to filter devices
3) map all devices on a single pair of ports and use masking to filter devices
I don't see too many options here ... :-/
srichev
130 Posts
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January 22nd, 2009 06:00
This is another option i am thinking...May be using veritas exclude file to list the disk that needs to be excluded on the host.
xe2sdc
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January 22nd, 2009 07:00
The thread may stay here or move itself in Symmetrix area depending on your taste .. Tell me what you prefer and I'll move the thread if needed.
Use Veritas Exclude file ?? Never used it .. I work for EMC and tend to talk about EMC stuff
I'll try to find a thread dealing with lun offsett .. check back soon !!
srichev
130 Posts
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January 22nd, 2009 08:00
Not sure on yout second point. 2) map all devices on a single pair of port and use lun offsett to filter devices.
BY Lun off set,Can i tell scan only 1-10 LUNs or 11-20.So that it will scan only those?
xe2sdc
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2.8K Posts
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January 22nd, 2009 09:00
Have a look at the following thread:
https://forums.emc.com/forums/thread.jspa?messageID=500258
Enjoy!
srichev
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January 22nd, 2009 10:00
Message was edited by:
srichev