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тАО11-21-2005 06:57 PM
тАО11-21-2005 06:57 PM
xp128 2D+2D configuration.
does it required to configure 2D+2D?
I roughly understand i has been needed due to bcopy. but I don't know exactly.
I mean how does disk can split and mirror?
PV Name /dev/dsk/c12t0d1
PV Name /dev/dsk/c10t0d1 Alternate Link
PV Name /dev/dsk/c13t0d1 Alternate Link
PV Name /dev/dsk/c9t0d1 Alternate Link
PV Status available
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тАО11-22-2005 01:51 AM
тАО11-22-2005 01:51 AM
Re: xp128 2D+2D configuration.
Your system is able to "see" a LUN thru 4 FC interfaces/pathes.
Have a look at the "xpinfo [-i]" output.
Hope this helps!
Regards
Torsten.
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тАО11-22-2005 05:40 AM
тАО11-22-2005 05:40 AM
Re: xp128 2D+2D configuration.
It means your 2D+2D ldev/LUN is presented to 4 HBA's to your server.
With LVM it is shown as PVLINKS or Alternate Paths. Under this config - ONLY ONE active path to your LUN is active.
Same with VxVM DMP with the advantage of actually distributing load accross the 4 paths
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тАО11-22-2005 05:24 PM
тАО11-22-2005 05:24 PM
Re: xp128 2D+2D configuration.
,for load distributing or bcopy ?
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тАО11-22-2005 07:22 PM
тАО11-22-2005 07:22 PM
Re: xp128 2D+2D configuration.
Well the answer to that could be:
1. your IT shop standards state that LUNs must be distributed to more than 1 path
2. yes for load balancing
3. in cases where access to a LUN via the primary is inaccessible, the alternate path can be used
HTH