block devices past sdzzz

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Apparently i'm walking into a delimea. I have a little storage box with 32 FC port, and attaching to FC switch and 4 to 16 initiator ports per host.

if sdzzz is representation for last block device, then that limits me to <137 presented disk devices... (i do need a few for the internal system disk). .. that would be 26X26X26 - system block device(s) . .. .. if my math is correct.

So question is... can i get past sdzzz by doing some parameter and rebuilding the OS ?? I've found limited information concerning going past sdzzz ...except for subtle comments that i'm walking into the danger zone ??

gene

Responses

You'll probably see mention of this patch in 2.6.37 which can name right up to 31 characters. This patch has been upstream since 2008 (3e1a7ff) and is in RHEL 6.

Theoretical limits were discussed on linux-scsi at http://marc.info/?l=linux-scsi&m=128508938112750&w=2

Note the maximum number of supported block devices is 8192 on RHEL6.

Is the maximum number of supported block devices for RHEL7 going to increase .?? and if so are you at liberty of stating what that number is ?

thank you for responding sir. !

I am not sure, but I'll follow up internally and try find an answer for you.

The supported limits will be supplied at General Availability of RHEL 7.

The Release Candidate is available now and all customers invited to test the RC for their specific use cases.

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