[dm-devel] max number of paths

[guy keren]

Charlie Sharkey wrote:
>  
> 
> Is there a maximum number of paths supported by the device mapper ?
> 
> I have a setup with 12 paths to 14 luns. I had to reduce the number of paths
> 
> to 10 for the device mapper to startup correctly.

i have seen such problems with linux kernel 2.4, long ago, when max SCSI 
disk devices was 256 (and hence - also max paths for such devices).

if you're not using SCSI, but rather some other type of device - it 
could be a limitation of the specific low level driver.

which kernel are you using? and which linux distribution? and what kind 
of block devices do your disks reside on?

--guy