swapping 4 HDD from one NVX to another NVX

As long as they're running the same firmware swapping drives wouldn't be a problem. Power off the NAS (obviously), put your complete disk set in (in the same order as they were like you mentioned) and power it back up. Configuration stays with the drives.

Thanks so much....

I will try it out...

-Gopal

In addition to the above, also take a look at http://www.readynas.com/kb/faq/boot/how_do_i_migrate_disks_over_from_an_existing_readynas_to_another

Thanks for the link

Gopal - when you swap the drives as above, when you boot the swapped units, you will note they have taken the identity of the drive set. For example when you take the empty chassis from home to the office and install the office set of drives (NAS2) when it boots it will have the host identity of NAS2, the configuration and set up of NAS2. The only difference you will be able to see in Frontview or RAIDar is that the MAC number and serial number will have changed. The users should not be able to detect any difference. Same thing with your home unit.

As for the former NAS2 chassis that is now in your home, if you are getting a sudden shutdown and reboot, you may want to run the memory test several times. At least at home you can work with it without interrupting business operations.

Dears

Does the data remain safe ?

Should have no effect on the data. When I got my second NVX (a Business Edition) to add to my NVX Pioneer, I decided to make it my primary NAS and the Pioneer the backup. I simply shut down the Pioneer and move the set of drives (complete with trays) to the new BE, maintaining the order (from slot 1 of Pioneer to slot 1 of BE) and after inserting the fourth drive, closed the front and booted. Everything came up as it was, and the drive mapping of shares in Windows still worked just fine since they map to host name and the host name (NAS1) went with it. I then added the new drives to the Pioneer and began the backup.

This of course assumes a healthy array. If there is a problem with the array, it will go with the array to the new chassis. This procedure will also work with any other chassis withing a family as long as there are enough bays to accommodate the drives. You can go from a Duo v1 to an NV+ v1 and vice versa (unless the array has three or four drives). You can go from an NVX to a Pro 6 and an Ultra 6 to an Ultra 4 (as long as the array is four or fewer drives).

But, backups are always important.