So when we are talking about external drives for backup, then writing time
is also very important, eSATA does not has that much advantage here.
C.H.Ling
----- Original Message -----
From: "Chuck Norcutt"
> AS I said the other day, disks spend a lot of time just trying to get to
> were they're going and, once they get there, waiting on the correct data
> to rotate around to where the head is. They all seek to where they're
> going at very similar rates and, assuming the same RPM on the platters,
> they all wait at the same speed. Actual data throughput gets dragged
> down by all the mechanical delays.
>
> But do be aware of what you're comparing. If you are simply reading
> from the USB drive into memory but reading and writing between the two
> SATA drives then the write operation has the SATA drives at a big
> disadvantage. Writing takes longer than reading and the reading from
> drive 1 can't go any faster then the writing to drive 2 once the cache
> is full.
>
> Chuck Norcutt
>
>
> C.H.Ling wrote:
>> 5x! Did you ever made a real comparison? I got 22MB per second for USB
>> and I
>> can't get over 30MB with SATA to SATA (two hard disks inside the same
>> PC). I
>> believe the HD sustain rate and other overheads in the computer limited
>> the
>> data rate a lot.
>>
>> C.H.Ling
>>
>> ----- Original Message -----
>> From: "Moose"
>>> I'm simply not buying any external HD which is USB 2.0 only. eSATA is
>>> WAY faster, 5x the speed, and only a very few $ more, if that. Maybe it
>>> shouldn't make a difference for a drive planned for backup use only, but
>>> it does for me. I simply find it easier when the process goes faster.
>>>
>>
> --
> _________________________________________________________________
> Options: http://lists.thomasclausen.net/mailman/listinfo/olympus
> Archives: http://lists.thomasclausen.net/mailman/private/olympus/
> Themed Olympus Photo Exhibition: http://www.tope.nl/
>
>
--
_________________________________________________________________
Options: http://lists.thomasclausen.net/mailman/listinfo/olympus
Archives: http://lists.thomasclausen.net/mailman/private/olympus/
Themed Olympus Photo Exhibition: http://www.tope.nl/
|