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AmirBahram
14 Posts
0
1025
January 27th, 2013 05:00
Enclosure Id does not get number in sequence in backed daisy-chain loop
Hi all,
there was a new VNX 7500 (Block system) installation and all the cabling between backend buses and enclousres was right but the IDs does not appear in sequence in daisy-chain. for example there was like that 2,1,4,3,0 which supposed to be 0,1,2,3,4. and also some buses does not have enclosure ID 0.
I did some tests, it seems these IDs are fixed on LCC, even if I change the order of enclosure in the loop the enclosure always get the same ID.
Since DAE6S enclosure get its ID automaticaly and always the first enclosure in the loop get the ID 0 and the second one get ID 1 and so on ...
should it be cause of problem in the future ? or may be the IDs change under some circumstances? like rebooting SPs( I did a few reboots but the IDs haven't changed). is there any way to order these IDs in sequence?
Regards
AmirBahram
14 Posts
414
0
Posted January 27th, 2013 13:00
Hi Gearoid
thanks for your reply. As I said, it's new installation and nothing has been configured yet. Is there any way to change Encolusure IDs and make them in order?
Regards
Amir
christopher_ime
6 Operator
•
1962 Posts
414
0
Posted January 27th, 2013 15:00
Amir,
Follow-up with support and reference the following KB article:
emc267717: "How to number VNX Series DAE enclosures sequentially"
You won't have visibility to it as it is a support directed process.
AmirBahram
14 Posts
414
0
Posted February 3rd, 2013 10:00
Christopher,
Thanks for your correct reply.
Regards
GearoidG
251 Posts
414
0
Posted January 27th, 2013 08:00
Yes there is something called automatic enclosure sequencing built in so this possibly what you are seeing
Now a question for you, do you have any luns/pools/raidgroups/hotspares bound on these enclosures yet? (as that will cause issues trying to resolve this)
Gearoid