jæd said:
I could go on. Basically... If you look after it properly, maintain it and choose a quality supplier then a computer should last at least five years. Is Apple a good supplier. Yep... They have the occasional duff machine but they do seem to have good build quality...
My mum's still using my 1994-vintage PowerMac 7100, though I changed the hard drive for something bigger and more modern a few years ago.
Hard drives can and do fail - along with the power supply, they're the bits that are more likely to be prone to failure.
Drives will usually be quoted by HD manufacturers with a Mean Time Between Failures figure. You can check out the hard drive model by going to 'About this Mac' on the Apple menu and click on the "More info..." button, then do a google search. The
Fujitsu MHT2080AT in my PowerBook is quoted at 300,000 hours of operation.
However, that figure is a bit misleading if you're then expecting any particular drive to fail keep working for 34 years

- there's a nice explanation of what the MTBF figure means
here.
The more useful figures are the
service life of the drive, which in the case of my Fujitsu drive is 3 years and, critically, the warranty period, which is only 1 year, meaning that Apple can't claim back the cost or replacing it from Fujitsu if it fails after 14 months (actually, in the UK there's a
distinction between a Guarantee and a Warranty, so it's properly a 12 month Guarantee).
FWIW, in the 15+ years I've been playing with Macs, I've only had one Apple-supplied drive fail on me at home - a dodgy Seagate died when it was about 6 weeks old. They were already the subject of a recall and I'd already organised a replacement when it decided to go for a Burton.
As for ones I've bought along the way, an internal 320MB Quantum Fireball SCSI drive did the 'click of death' after about 18 months, and a 200GB external LaCie went belly-up after about 14 months of use.
I've definitely had a few more 'apple' drives go at various clients' sites, though I can't say I've noticed it getting any worse over the last few years.
If it gets that far, I start to distrust any hard drive after it's about 3 years old and would start to think about replacing it as a matter of routine if it's got important data on it.