If somebody has interest, i have just writte a tftpd supporting blksize,tsize etc .... for os/2 right now from my os/2 server i boot memdisk with a dos disk with Dos lan requester on it connect to a server and performing a backup/restore partition with drive image Our company is doing RIPL since +- 10 years using ripl and Work space on deman,we are migration to PXE boot (ip boot again iee800.2 boot). In our migration plan we are going from os2 to Zlinux (linux on the mainframe) with a PXE boot for the clients, We are actualy develloping a pam security module for linux to query our Primary Domain Controler OS/2 and to build dynamicly a desktop based on the logon and information present the DCDB (domain controler data base)