On Thursday 22 February 2007 02:21:08 pm John Andersen wrote:
On Thursday 22 February 2007, Morten Bjørnsvik wrote:
|From: Kai Ponte [mailto:kai@perfectreign.com] | |On Wednesday 21 February 2007 11:44:33 pm Joachim Schrod wrote: |> John Andersen wrote: |> > On Wednesday 21 February 2007, Greg Freemyer wrote: |> >> There really is a reason that SCSI costs more in general, and HP |> >> uses good SCSI drives on top of that. |> > |> > The good reason is that people believe they are better, not that |> > they actually ARE better. | |And another good reason is that they are DESIGNED to run 24/7 |for extended periods. IDE drives are not built to the same |tolerances. You'll also find the MTBF is much shorter.
This paper show there is NO connection between price, interface technology and MTBF: (The study covers more than 100.000 disks over many years): http://www.usenix.org/events/fast07/tech/schroeder/schroeder_html/index.h tm l
Google failure trends in large disk drive populations: (more the same but not so diverified) http://www.usenix.org/events/fast07/tech/pinheiro.html
-- MortenB
Thanks for the references.
My point was that the historical differences between disk interface technology no longer exist, and manufacturer claims, in light of > 90% parts interchange-ability, are simply not believable, nor born out by actual use.
Tolerances are hardly germane when the entire physical structure other than electronics is often identical across drive sizes, interfaces, and product lines.
Yet some here persist (you know who you are Kai, ;-) in echoing the dogma of yesteryear as to why scsi is better. There was a time this was true. There was a time when a Lincoln was way better than a Ford.
I guess that is why I'm a pointy-haired manager - and why they don't let me in the server room. :P I can still find my way around stored procedures, though!
Seagate offers 5 year warranties on sata these days. When it comes to buying drives, given two offerings with close-enough specs, I always go for the longer warranty. Any minor saving in price today will be lost when the drive fails in three years instead of 5 or 8.
Wow - five years! I had no idea. I just bought some maxtor 320 GB thingy at fry's. I have no idea what warranty it has. -- kai Free Compean and Ramos http://www.perfectreign.com/?q=node/46 -- To unsubscribe, e-mail: opensuse+unsubscribe@opensuse.org For additional commands, e-mail: opensuse+help@opensuse.org