Backblaze, one of the larger cloud storage providers, publishes their drive failure reports every so often with some analysis. You can download the data if so inclined but the latest Q3 2016 report shows about a 2% failure rate. So if you had 100 drives in service you should expect two of them to die every quarter.

https://www.backblaze.com/b2/hard-drive-test-data.html

CB

On 3/24/17 5:17 AM, Nickus de Vos wrote:
As for the long Jevity of spinning hard drives, you have nothing to worry 
about. Everyone have been using spinning drives for years and years with out 
any issues. Sure any Drive can fail after a year or 2 of used, but so can A 
solid state drive.
Any computer get clogged up after a couple of years requiring a format to get 
things quick and fresh again, this happens with machines running both hard 
drives and solid-state drives.



Sent from my iPhone

On 24 Mar 2017, at 09:54, Simon Fogarty <si...@blinky-net.com> wrote:

Oh yeah,

They like any moving object start dying after a while.



-----Original Message-----
From: 'Chris Blouch' via MacVisionaries [mailto:macvisionaries@googlegroups.com]
Sent: Friday, 24 March 2017 2:57 AM
To: macvisionaries@googlegroups.com
Subject: Re: New iMac, A Bit slow and Sluggish

Interesting. I had not heard about spinning disks degrading over time.
I've heard of operating systems getting loaded up with goo from old files left 
behind and such, but not the drive. There is the stuff about drives remapping 
bad blocks over time, but I wouldn't expect that to make an impact with all the 
on-drive caching these days.

CB

On 3/23/17 4:43 AM, Scott Granados wrote:
Ok, remember that spinning drive will degrade over time and make that Mac crawl 
so make sure you’re backing up regularly because a reformat and reinstall does 
fix the problem.  (As does replacing it with an SSD).

Good luck and glad it’s sorted out.

On Mar 22, 2017, at 5:20 PM, 'Jim Fettgather' via MacVisionaries 
<macvisionaries@googlegroups.com> wrote:

This is a spinning hard drive, but a brand new Mac.
Fortunately, as others have suggested, it settled itself in after a day or so 
and is now running lightning fast.
Thanks.

-----Original Message-----
From: macvisionaries@googlegroups.com [mailto:macvisionaries@googlegroups.com] 
On Behalf Of Scott Granados
Sent: Wednesday, March 22, 2017 10:44 AM
To: macvisionaries@googlegroups.com
Subject: Re: New iMac, A Bit slow and Sluggish

What kind of disk are you using, SSD or regular rotating/. Also is this a new 
IMAC or a used older model?

Thank you

On Mar 20, 2017, at 9:55 AM, 'Jim Fettgather' via MacVisionaries 
<macvisionaries@googlegroups.com> wrote:

Hello.
I had tested out the $999 21 inch iMac running Sierra in the Apple Store, and 
it had run with impressive speed and responsiveness.
Applications opened quickly, web pages loaded quickly, and there was no lag or "busy 
signals" at all.
I purchased the unit, and set it up with my Apple ID and iCloud account, there 
were a couple of software updates, so the machine restarted twice.

It is not as fast ore responsive as in the Apple store.  There are occasional 
pauses or delays.

It is interesting, I have a 3 year old MacBook Air that is just as fast as the 
day it was purchased.
Yet, this new iMac is not quite running as smoothly as I would have expected, 
especially after having seen it running so beautifully in the Apple store.

Any suggestions at all for tweaking this Mac to run as might be expected?
Thanks a lot.



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