Hi,

The patch i attached defines max_sectors for each NBD device to be 256 
which is 128KB as described in the protocol description i attached.
The value 255 which is default in 2.4 kernels is not optimal. See my 
other posting in the lkml to read why.
The patch seems to work fine. My server-implementation receives one 
128KB request as expected instead of two 127KB and 1Kb requests.

Even if 256 is the new max_sectors-default of kernel 2.6, the patch 
should be applied since the value should be part of the protocol 
specification and therefor part of nbd.c

The documentation i attached should be published somewhere. For example 
on nbd.sf.net since we didn't find one source where all the information 
is collected.

Thx
   Sven