I recently tried to fit a 1.5TB into a Humax unit - it does work but the process is significantly more involved than that which would be required for a 1TB or less drive. There seems to be some numeric limits in the software that prevent full function.
If you just swap the drive it is recognised by the unit, the unit boots and attempts to format the drive but gets no further than this. As a warning to other users, if you put the original drive back after failing this format operation the unit insists that it also wants to format the original drive - it seems that the unit knows that it has started a format and partition operation and remembers this and will continue to try to do this until it is successful. I used a different smaller drive at this point, the format and partition were successful, and then swapped back to the original drive to leave the unit unchanged.
In terms of getting the Humax to work with a drive greater than 1TB, I did the following:
- Using a copy of Ubuntu Linux or 'Parted Magic' - you can run from CD or USB key, or in my case on a VM image on a mac - I took the original drive from the unit and copied the reserve.info file which appears on the first of 4 partitions on the drive. I have no idea if the reserve.info file is significant, but I'm just repeating what I did.
- The original 350GB disk is partitioned (ext3) as follows:
Device Volume Size Assumed Purpose
/sde1 /media/disk 2.2GB System info
/sde2 /media/disk-1 106MB ?
/sde3 /media/disk-2 218GB Video
/sde4 /media/disk-3 27GB Music/Pictures
- I then put the new 1.5TB drive into the caddy and split it into 4 ext3 Linux partitions:
Device Volume Size Assumed Purpose
/sde1 /media/disk 10GB System info
/sde2 /media/disk-1 10GB ?
/sde3 /media/disk-2 1000GB Video
/sde4 /media/disk-3 Remainder Music/Pictures
- I then copied the reserve.info file back onto the first partition and put the new drive back into the Humax unit.
- Switching the Humax on it goes to 'boot' then switches itself off again and needs to be woken using the remote. It doesn't attempt to re-format the drive.
The Humax is currently working fine and can record HD and SD without any issues, but all status information on drive size etc is wrong. I think that this is a software issue - somewhere there is a calculation that doesn't deal well with the the larger size of partition. Maybe the output was only ever expected to show 3 digits not 4!
My guess is that this might be fixed if the video partition was reduced to 999GB (or less) so at some point I will do this - or if necessary I will re-partition the whole drive so that it totals to less than 1TB.
If you don't want to go through all of this hassle I would suggest that you only replace the internal unit with a drive of 1TB or less. That way the unit itself can deal with all of the formatting and the change would be very very straightforward.