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Max emcpower devices on Linux 4 server
I am running a Linux server with the following;
PowerPath Version 5.1.0 (build 194)
RedHat AS 4.0 Kernel 2.6.9-67.0.1.ELhugemem
On a DMX-3
Two Emulex LP-10000's
I currently have 17 devices assigned to this server which go up to /dev/emcpowerq. I need to add more capacity this server, but before I do I wanted to know if there is a maximum number of power devices this server configuration can handle?
PowerPath Version 5.1.0 (build 194)
RedHat AS 4.0 Kernel 2.6.9-67.0.1.ELhugemem
On a DMX-3
Two Emulex LP-10000's
I currently have 17 devices assigned to this server which go up to /dev/emcpowerq. I need to add more capacity this server, but before I do I wanted to know if there is a maximum number of power devices this server configuration can handle?
Conor
341 Posts
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Posted March 8th, 2009 05:00
The limit of supported (by EMC) SCSI devices on Linux hosts is 1024.. Every path to a LUN is counted as a SCSI device, so if you have 4 paths to each LUN then the maximum number of emcpower devices is 1024/4 = 256.
PowerPath supports up to 32 paths to each device.
Let me know if this answers your question.
Conor