I have the Pioneer 6900 ub. Works perfect with a 60g Ipod usb playlists very quick. I am trying to set it up with Toshiba 120g using a 5v power cord from Addonics. It works except not every time, reads playlists etc has random that goes to root of every folder, about 6000 mp3s some 320. Called and talked to several Pioneer agents about why it doesn't boot every time, no help other than they say the HD MFG best is Seagate. I will get a Seagate and try but it could be quailty of my 5v power adapter car battery driven, maybe the Fat 32 something like that.
If I really want it to boot this procedures works with Toshiba drive, boot to Ipod via usb, then pull face plate for about a minute, then it will boot to 120g usb???????? When I get in car after it has sit for awhile or I add some files to hard drive it works but a restart of car and nada, may be a memory issue with head unit, possibly voltage issue. At this time easier for me to go buy a seagate.
I saw an earlier post about computer in car I have been running a laptop in my car for 5 or 6 years. It really works good nice big maps for the GPS, email with a Sprint wireless card (speeds similar to avg DSL) spreadsheets, address data base, appointments, etc, you can even make a VOIP call with it in certain good bandwith areas. It hooks up to sound system, and you can use unlimited hard drive files with it but it too many functions for one item. I like the music to be a different source if you are looking at a map or a email and wonder what song or artist is playing it is better just to look at the head unit, using a mouse or using a computer keyboard on a bumpy road in traffic is tricky. Stoplights are your friends.
I will post the results of the Pioneer with the Seagate 160g, and a Maxtor 80g.