ndmpcopy is the best data migration method based on the situation you described. ndmpcopy will have to be run from a Unix system. This is basically the migration controller. You can do a rdist style refresh (like a incremental backup), just use the -level 0 option for the initial copy, then you can do -level 1 (up to 9) for your incrementals.

Best method is to setup crossover GbE between the filers.

HTH,

Aaron

-----Original Message----- From: Leonard, Roger [mailto:Roger.Leonard@marconi.com] Sent: Monday, April 23, 2001 3:18 PM To: 'toasters@mathworks.com' Subject: data migration

i have 4 filers (330's and a 540) that i need to migrate to one 840. the 840 is brand new with lots of empty 72GB disks and space is not an issue. we were initially going to use snapmirror, however the old machines have volumes of varying sizes, from 120GB on up to 400+. with the 72gb drives, we would have some inefficent raid groups if we did a volume-volume copy. plus i want to shuffle and shift the data around during this move. a "refreshable" copy at the qtree or directory level from old filer to the new is what we need. it looks like ndmpcopy will support this. has anyone ever used this? is this something we can do from the filer CLI?? i didn't see anything at the help prompt. maybe we need to download ndmpcopy and do it from solaris after starting ndmpd on the filers? my downtime would be minimal as well, so a quickly refreshable (ala rdist) copy is needed. any thoughts would be appreciated.

thanks

Roger D. Leonard