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April 21st, 2009 02:00
Maximum LUN IDs - different hosts
Hi All,
I would like to know what the maximum LUN IDs each type of host can handle, e.g:
Windows = 255 (0FF).
I am fairly certain HP-UX is 512 - however HP-UX count LUN IDs completely differently from other hosts.
But I really want to know about Solaris - I have a feeling it is the same as Windows and can only handle up to 255 or 0FF but would like to know for certain???
I have a Solaris server presented to two FA's and the first available address is 0FD on both and I have 5 LUNs to present. If my thoughts on the max LUN address are true it will mean I will need to use LUN offsetting which is relatively easy but would prefer not to have to do that if at all possible. Using different FA's is not really an option for me.
I would like to know what the maximum LUN IDs each type of host can handle, e.g:
Windows = 255 (0FF).
I am fairly certain HP-UX is 512 - however HP-UX count LUN IDs completely differently from other hosts.
But I really want to know about Solaris - I have a feeling it is the same as Windows and can only handle up to 255 or 0FF but would like to know for certain???
I have a Solaris server presented to two FA's and the first available address is 0FD on both and I have 5 LUNs to present. If my thoughts on the max LUN address are true it will mean I will need to use LUN offsetting which is relatively easy but would prefer not to have to do that if at all possible. Using different FA's is not really an option for me.
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RRR
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April 21st, 2009 02:00
RRR
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April 21st, 2009 02:00
Message was edited by:
RRR
Sorry about this.... It seemed my 1st copy of the post didn't come through
Conor
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April 21st, 2009 04:00
The Solaris configuration file /kernel/drv/sd.conf should contain all Targets and LUNs that a user may want to access. Devices accessed via Emulex Fibre Channel adapters and Emulex driver can be up to 512 Targets with a maximum of 256 LUNs per target.
I'll go dig out what the maximums are for Sun Leadville driver too....
colinwilson
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April 21st, 2009 04:00
I had a dim and distant thought lurking at the back of mind that said solaris can handle up to 512 but I wasn't sure if that was just wishful thinking.
Thanks for the help - makes my provisioning that little bit easier.
Conor
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April 21st, 2009 04:00
RRR
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April 21st, 2009 04:00
colinwilson
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April 21st, 2009 04:00
Conor
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April 21st, 2009 04:00
The number of LUNS per target for QLogic HBAs has now been increased to support a maximum of 16K
http://wikis.sun.com/display/SFSRelNotes/Sun+StorEdge+SFS+4.4.14+Release+Notes
SKT2
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April 21st, 2009 09:00
xe2sdc
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April 21st, 2009 22:00
I've personally seen solaris hosts (with leadville drivers) using luns over 0xff (255). I guess they don't lie
RRR
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April 22nd, 2009 04:00
techmute
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June 26th, 2009 07:00