Well, the new HD isn't quite what I thought it was. It's not a replacement HD - it's a small external (USB) HD. That's ok - I can always use more space. The trouble started when I hooked it up to Windows. It was recognized, but it wouldn't mount. That was a bit confusing. I slapped it across the room to the Mac, and discovered why - it had no file system on it. The Mac was able to format it as a Windows drive though, so I can now use it for either system. It's small enough to pack in my bag, so I could presumably install Linux on it, set my notebook to be bootable from USB, and have a Linux system at Smalltalk Solutions in April. I'll have to see about doing that - for today, I've had enough system maintenance :)