Thanks so much, guys. : )
As an update, and for the possible benefit of others, here's my report about how things went. Bottom line: It had its glitches, but turned out very well.
The glitches were due to Vista's handling of external USB drives, which requires some tweaking, and IMO, is still a little iffy.
To wit: selecting "Safely Remove Hardware" in Vista often reports that it cannot... the disk is in use, even when there is no apparent reason. Many people shut down to remove them at that point, but I'll note that I simply put the laptop in standby. The lights went out then, and the disk stopped spinning, so I felt safe in unplugging it.
To "fix" the problem, after googling, I took these steps:
- Disabled indexing on drives other than C. (On C too, if you choose.)
- Told the recycle bin not to monitor that drive
- Tried to tell disk management to "optimize for safe removal." (This only worked through the advanced properties dialog under my admin account, and seems to revert to "optimize for high performance" in the main dialog.)
From my T41p (XPpro) (on which "Safely Remove" was working fine as- is), I deleted the pre-installed software from the freeagent drive. (The pre-installed version isn't compatible with Vista 64 anyway. You have to download the 64-bit compatible version from Seagate's site.)
After I took these steps, I was able to get an "It's safe to remove the hardware" response on the T400, *
As long as I only log in as either admin or as standard user while it's plugged in. Once I switch users, even if I log out of one, it won't safely remove; I get the "in use by process ID 4" in the event viewer. Go figure.
Note: the lights of the freeagent drive still do not turn off like they do when you go to Standby, or like they do when I select "safely remove" from my T41P. Googling, I read
here, and in a couple other places, that that is a new "feature" in Vista, which we shouldn't worry about.
OK... but I'm a little skeptical, because I also tested it on my 2GB Cruzer flash drive.... it said I could safely remove it, even though the light on it stayed on... but when I next plugged it into my T41p, the Sandisk said that it had not been safely removed the last time.
So, FWIW: according to MS, we can ignore the lights, as long as windows says an external disk is safe to remove. But the software in the Cruzer didn't think so. Who knows.
Moving on from there:
- I didn't bother installing any of the software Seagate provides.
- I also chose not to partition the disk at this time. Vista has a built-in resizing utility, so it can always be done later.
To backup, I just went to the Vista Backup dialog from the start button, selected the Complete PC Backup, and it took it from there. Easy-breezy, and it only took 24 minutes to backup all three partitions.
The total size of the three partitions, and what Vista said it might need room for, was ~60 GB, but the size of the backup file was only 38GB.
Anyway, hope that helps anyone looking for answers in the future. : )