Re: Speed Problem Copying Files
- Date: Thu, 9 May 2019 10:51:22 -0400
- From: Dan Ritter <dsr@xxxxxxxxxxxxxxxx>
- Subject: Re: Speed Problem Copying Files
Jeremy Nicoll wrote:
> On Thu, 9 May 2019, at 15:17, Gene Heskett wrote:
> > ... and its one of the reasons
> > an SSD seems so much faster because they seek in a microsecond
> In what sense does an SSD have "seek time"? Seek time is
> a tightly defined thing.
> There must be delays in SSD firmware's processing, I suppose, but
> it isn't seek time.
In this case, the latency between the OS issuing a read/write request
and the drive beginning to fulfill it.
IOPs is usually a more useful way of putting it: a spinning disk
offers between 80 and 150 I/O operations (seeks) per second; a
typical SSD offers between 15000 and 600000 IOPs.