Sorry, overlooked the second part. I did the comparison by copying SATA to
USB and SATA to SATA with the same 20GB data. I have not tried to check the
Read rate only.
C.H.Ling
----- Original Message -----
From: "C.H.Ling"
> 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.
>>>>
>>>
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