A few months ago I bought some new speakers and an amp for my Jeep. I made a little face plate with an ALPS potentiometer to control the volume and it has an iPod dock (no head unit, just the pot).
A couple days ago I finally was able to order a Raspberry Pi, and I want to make my own head unit for my car that supports 192/24 for my vinyl rips (iPod only outputs 48/16).
Can I use a HDD to store my music on? I know that the gyro effect on the HDD spinning can cause some serious problems if the drive is twisted around a different axis than the platters (because the head of the HDD can scratch the disk).
If I securely mount a HDD in my jeep will it break? When I go off road the jeep probably does up to ±4g of acceleration for short times in random directions. Can a spinning HDD tolerate that?
I will use a SSD if I have to, but even a small and (relatively) slow SSD for my 100GB of music will cost A LOT of money where as a 256GB HDD cost about $10 on eBay.
A more complicated option would be to cache my current playlist to the SD card on the RPi and install an accelerometer. I could monitor the accelerometer and make it stop reading from the disk when the acceleration goes more that 1.2g or so.