[mythtv-users] mythtv-users Digest, Vol 107, Issue 50

[James Linder]

On 18/02/2012, at 7:14 AM, mythtv-users-request at mythtv.org wrote:

>> Perhaps in your over general bashing you should consider
>> https://www.google.com.au/search?q=seagate+ata+more+than+just+an+interface&ie=utf-8&oe=utf-8&aq=t&rls=org.mozilla:en-US:official&client=firefox-a&oei=t_w9T7_UKPCviQfdh9DCBA
>> the Seagate 'more than just an interface' paper
> ..
> 
> ..which after reading, suggests that the only major difference that matters
> is that the "enterprise" drives spin faster than the 7200rpm maximum that
> is permitted for "non-enterprise" drives (one lone WDC model excepted).
> 
> Just about everything else in that article involves tech and materials
> to permit the drive to still function without exploding at those higher
> RPM speeds.  Plus they use more complex host interfaces (than SATA).
> The drives end up much more complex, with lots more silicon inside,
> and thus don't fare any better for home use on the MTBF front.
> 
> For enterprise use, they *might* do better, but Google discovered otherwise
> a few years ago.  That may have changed (or not) since then.

My take on it was the disk1 seeks knocks disk2 off track so disk2 seeks ... until a disk fails.
If you backup on the same spindle then call it 'a copy' since a backup it is not.
More than one disk in a box and disks will fail.
Ergo backups need to be on a separate machine.

James

PS It really would have been useful if the Google paper had explored this aspect.