Neil Schneider wrote:
Well that may be what the specs say, but real life experience says
different. In my experience, transfering IDE drives using dd on the
same controller will take overnight to complete, and there may be
multiple errors. Comparable transfers using scsi will take hours.
Drive size and speed all enter into the equation.
Note that with SATA each disk has its own dedicated controller.
Speed continues to improve but the drive sizes increase at the same
time. I can't prove what I wrote, I can only report my experience.
Drive size is increasing far faster than speed. That's a problem. Not
only is that a problem but an even bigger problem is that reliability is
not really increasing at all. This article:
http://blogs.zdnet.com/storage/?p=162
says that in 2009 it may be impossible to recover a 12T RAID array due
to the unrecoverable read error rate of a drive.
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