Charlie Jefferson:Hi Pete,
Thanks for your further insights re: DNLA-enabled NAS and your experience of the Exposure CDP.
I'm keen to keep my 20,000 plus songs on my existing ext.drives & run it all using my Mac to DAC via AE combo. So I'm not too sure what you're suggesting, and if it's of any benefit to me. Please bear in my mind I'm a computer/tech-dunce. Hence, why I use a Mac. Great functionality, virtually zero knowledge of it's workings required!
The Exposure CDP is vaguely tempting. There are a couple on eBay within budget, but it'd be a blind punt. The same money buys me a new CA BD650. Though that presents problems because I'm still not sure if it's SACD mode would work with my DAC. Or is SACD and off-board DAC not an option?
Who knows, I may just go and buy a lens cleaner tomorrow and see if the stuttering Arcam can be restored to it's former glory.
I'll try to help, with a career based in IT Support behind me... All electronic or analogue data, stored in whatever form is prone to deterioration - this is true for music, whether printed, stored on vinyl, CD or your hard drive. Different factors can accelerate or delay the decay, but decay it will. The dangers with hard drive storage are not greater than for other forms on a fail by fail basis, and the lifespan of a modern drive is extremely good; the increased risk with a hard drive is its capacity. A modern 2TB hard drive can store 2000 hours of studio master quality music (FLAC 24bit @96kHz, more like 8000 hours at CD quality (FLAC 16bit @44.1kHz) and even greater amounts using lossy compressed music formats such as Ogg or MP3. One CD failure, lose 1 hour, one hard drive failure lose everything.
External drives are more at risk than other types, with the connection method, portability and the regular power cycling both increasing the risk to the content. For this reason they are mostly used in the IT world for temporary backup.The safest approach to data storage is in a managed device e.g. a network attached storage system (NAS) which has at least two drives that act as one. This means the disks are not power-cycled nor moved and the data is already replicated (backed up) once, greatly reducing the risk to the stored information. Ideally you would still backup the content to an external drive kept elsewhere...
With your music all stored on a network accessible store, you just access the music from the store and play it in your preferred way, but with the advantage of being able to play it anywhere and on multiple devices e.g. on a smart phone, via your Mac and AE or through a dedicated streamer directly attached to your DAC, controlled by some other device on the network. Video can be stored and played in the same way. FWIW DLNA (Digital Living Network Alliance, an immature, vendor-managed development of the UPnP standard which helps networked media gear communicate with each other) is better suited to video than audio, at the moment at least, but a solution can be provided that can work with DLNA as well as other sharing methods.
Going this route does require some expert help to configure and set up, but I think provides the best and most flexible solution going forward.