Migration Assistant can't find mounted external disc

Question

Running Snow Leopard on newer iMac Dual Core. Trying to migrate users of dead G5. The G5 User data is intact, and on an external disc, and was transferred to this external disc from the G5's HD, by techs at The Apple Store. The specs of this external drive are:
30.74 GB
Format: Mac OS Extended (Journaled)
S.M.A.R.T. Status : Not Supported
Partition Map Scheme : Apple Partition Map
Mount Point : /Volumes/Macintosh HD 1
The external disc mounts to the desktop, but Migration Assistant just spins and spins looking for it, without success.
I have tried to boot from the external drive; Restart/Option does not result in the external disc as a startup option.
I'm thinking when the Mac boys wiped the external disc to make room for the G5 User data, they reformatted the disc to non-bootable. In an experiment, Migration Assistant easily found and transferred User data from my laptop (when restarted in target disc mode).
Is there a way to help Migration Assistant find this external disk - or an option that transfers the User files intact from the external drive to the new SL machine?
Thanks,
lex

Answer 1

lexsongs wrote:
+then MA will not work on it, period. you need to migrate manually. Migration assistant does not give a hoot what the partition scheme is on the drive you are migrating from so don't bother with that. the partition scheme on your main drive should be GUID but it's probably that already.+
+P.S. if you still have access to the old drive of the G5 then you can migrate from that drive directly.+
Thanks V.K. I did open Disk Utility and was ready to change the partition scheme (on the external disc) to GUID, but based on your last post I will hold off.
Yes, I have the old G5 HD, and will get some help with connections for migrating - or will build an enclosure (or have one built) and then use MA to move the User folders. In the meantime, I can still access the data in all User folders on the external disk.
if all the data you need is in the user folders you can simply do the following. drag a user folder from Users on your backup drive to the /Users folder at the top level of the main hard drive. make sure you don't have another user by that name already present there. you'll need to authenticate with your admin password. once you copied the user folder to Users on the main drive go to system preferences->accounts. unlock the lock at the bottom, click on + and create an account with the same short user name as the name of the folder you just copied to Users. it will tell you that a home directory by that name already exists and ask if you want to use it. say "yes".
Question: What allows MA to work with the original G5 HD but not with the copied User data on the external disc?
I don't know the exact innerworkings of MA but it clearly checks the drive to see if it recognizes it as something it can possibly migrate from as it needs a lot of stuff present to work. It doesn't just migrate user folders. it migrates applications, some library files etc. so unless it sees a full clone of another system drive or a TM backup of another drive (which both have all that stuff present) it won't even try migrating.