too many devices mapped to front end director

i did a query the knowledge base for article emc108287 . but i didnt get . pls guide me to get the arcticle emc108287 for reference

Primus solution emc108287 is aimed at customers .. It sounds strange to me that you can't find it. Here is part of the solution.

Root cause:

In calculating the the maximum number of devices that can be attached to a particular processor on an FA, it is not just the meta head that is counted. Per the Symmetrix DMX Product Guide:

"using metadevices will reduce the number of host-visible volumes for a given number of devices (Symmetrix Devices) configured to the Fibre Channel front-end director; that is, each member of the metadevice will be counted to the allowed limit of devices configured to a Fibre Channel front-end director."

Fix:

Solutions Enabler 6.4 will include fields at the bottom of the symcfg list -FA xx -p y -available -address output to indicate how many devices (including meta members) are mapped to the FA.

Message was edited by:
Stefano Del Corno

thanks Stefano for the part of the primus ... also, pls tell me where should i look for the primus ? i might not have searched it at right place.

Home > Support > Knowledgebase Search > iView

That's where you'll find the primis cases.

looks like i am not eligible to use that option iView

Home > Support > Knowledgebase Search > Support Solutions Search

Try this one .. I switched my view to "customer" mode and it worked for me.

-s-

This is the query results i get .. i didnt get the primus article when i clicked on the link..
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Error msg: Error occurred while Validating. Too many devices are mapped to front end director. Check the symapi log file

Error msg: Error occurred while Validating. Too many devices are mapped to front end director. Check the symapi log file.|symapi-date.log file contains: 4/14/2005 18:44:18.679 29199 0 EMC:SYMCLI cfgControlValidate Local config server msg: 04/14/2005 18:44
Product(s): Product: Symmetrix DMX Family|EMC SW : Solutions Enabler SYMCLI Configuration Manager|OS: Open Systems

Date: February 23, 2007 ID: emc108287

Status: approved

I know we had this same issue awhile back. We found in the SYMAPI log that there seems to be a 4000 device limit per card. If you have 500 devices on say 9Ba and 3500 on 9Bb you have hit the limit of devices for that card. I know since we moved from 58 code to 71 and now 72 we have not really seen the issue. Another not is that it is the total number of devices including meta members. So if you have a 16 member meta it counts as 16 devices toward the 4000 limit. Hope this helps.

Hi YHM

Only 4096 devices can be mapped per FA. And these devices are hypers. This is for both the ports on a processor of FA.

Means that if you are using 4aA and 4aB then total number of hypers whihc can be mapped are 4096.

This is not 4096 meta but Hypers

I'm pretty sure it's NOT 4096 hypers, but 4096 symdevs ! There's a big difference between the 2 !!

In RAID1 2 hypers make up a symdev, in 3RAID5 4 hypers make up a symdev and in 7RAID5 8 hypers make up a symdev. A hyper or slice is simply a small piece of 1 physical spindel which you cannot address from a host.

Guys,

The original KB article is

https://support.emc.com/kb/32790

If you need to search for a KB based on a primus number just use the advanced search, limit to Knowledge base and add another criteria at the bottom, or you can modify the URL below and it should take you where you need, just change the piece at the end "%2CCONTAINS%2Cemc108287" to your Primus number

https://support.emc.com/search/?resource=SOL&adv=y&kbAdv=y&kbDatescParam=CREATE_DATE&kbAdvSearchCriteriaItems=AND%2CLEGA…