We are heavily using sysresccd too boot laptops via PXE and NBD.
Some Acer Aspire netbooks wont boot, nbd doesn't get a connection.
Syslog on server:
Aug 30 15:28:45 castor nbd_server: Read failed: Inappropriate ioctl for device
Aug 30 15:28:45 castor nbd_server: Exiting.
Aug 30 15:28:45 castor nbd_server: Child exited with 1
the netbook just display "nbd-client cannot connect, dumping to mini-shell".
goolging revealed some others heaving these problems, but no solution :-(