[Nbd] Question About nbd-server and Raid

["Wayne E. Harlan" <dr.harlan@...862...>]

I have been using nbd for almost a year to export a set of scripts I use 
to two other linux boxes.  For most of that time the exported partition 
was /dev/sdb3, as in this config:

# Network Block Device Export Config File
[generic]
    listenaddr = <my ip address>
    allowlist = true
    authfile = /etc/nbd-server/allow

[lfs]
    exportname = /dev/sdb3
    maxconnections=3
    transactionlog = /var/log/nbd0

Recently I migrated the files on sdb3 to a mirrored raid partition, 
/dev/md127p2.  The mirrored array was formed as whole disk and then the 
array was partitioned.  No problem mounting the partition locally, but 
when I changed the exportname as exportname = /dev/md127p2, nbd-server 
would not export it.  It barfed, with a message about "no valid 
exportnames".

Then, on a total whim, I made a link in /dev like:  ln -s md127p2 lfs, 
and then using exportname = /dev/lfs somehow allowed the nbd-server to 
export the mirrored partition.

Is it the characters in the name or the length of the name, or what ?

Thanks,

Wayne