Log in

No account? Create an account
Apple News 
15th-Jan-2008 01:07 pm
Halloween 2008- Captain Hammer
  1. MacBook Air- Ridiculously small new laptop. It cuts some corners (ports, optical drive) but claims good battery life and is really really small. Quite tempting. I think the new dark keyboard looks quite good. Ouch, I just saw the battery isn't user replaceable. That's not good.
  2. Time Capsule- Interesting idea. An Airport base station with built in hard drive for Time Machine backups. Not sure what they actually mean by "server grade hard drive". $500 for 1TB is a bit too expensive for my tastes, but it may be worth it for some.
  3. iPod touch gets iPhone apps- Nice, should have been there from the start, somewhat insulting that they're asking $20 for it rather than just making it a free update. This may be another result of their recent accounting changes.
  4. Apple TV updates, movie rentals, etc- Eh.
16th-Jan-2008 07:20 am (UTC)
Re "server grade" -- most hard drives available at retail and sold in consumer products are rated for only, say, 100k power-on hours, and that only if they're active less than 300 hours per month. Drives sold for use in disk arrays, OTOH, have a MTBF of perhaps 1,000,000 hours and are rated for continuous usage.

For example, the HTC426040G9AT00 in my laptop has the following specifications:
  • less than 333 power on hours/month
  • operating (read/write commands) less than 20% of POH
  • Continuous motor spinning should be limited to 48 hours period
  • they don't actually quote the MTBF

By comparison, here's the similar spec list for a HUS103030FLF210 fibre channel drive designed for enterprise use:
  • MTBF: 1,200,000 hours
  • 5 year lifespan ("Life of the drive does not change in the case that the drive is used intermittently.")
Note that they don't even mention POH or operating duty cycle; in enterprise applications, these are assumed to be 100%.
This page was loaded Oct 23rd 2019, 9:17 pm GMT.