I would like to know if anyone knows the maximum number of LUNs that can be under control by Powerpath v.5.3.0 on Linux (SLES 9, SP3). I know there is a maximum of unique LUNs and a maximum number of paths (#LUNs * # of storage array ports) that are supported. Do you know what those limits are? The reason why I am asking is that the documentation shows different values in different places. One document states 128, whereas an other document shows how to increase it to 3000 without stating what the maximum value is. I also opened a SR with EMC and they said 128.

This is what I have so far:

System Limitations

Layer	Limit	Value	Note
Storage	Max # of   LUNs per FA	65536
	Max # of   targets	32   Clariion SP Ports 32 Symm   FAs
OS with Emulex	# of   HBAs	16	Same   vendor and PCI type
	Max # of   LUNS seen by SLES 10	65536   (Emulex) 1024   (EMC) 8192   (EMC SP3 or higher)
	Highest   Address	16384   (EMC)
Powerpath	Max. #   of LUNs per server	128	Seems to   work today with 146 Modify (max_fds parameter in the /etc/multipath.conf)
	Max # of   Paths to a LUN	32