[kwlug-disc] SSD Drives/desktop

Bob Jonkman bjonkman at sobac.com
Fri Oct 22 11:40:00 EDT 2010


Eric writes:

 > SD readers can be both USB and internal.  The internal ones are nice
 > and fast, but the USB ones are bottlenecked by USB.

Even if the SD socket is internally mounted it could still be connected 
to a USB channel.  lsusb and lspci may shed more light on the internal 
connectivity.

--Bob.


On 10-10-22 10:45 AM, Eric Gerlach wrote:
> On Fri, Oct 22, 2010 at 2:23 AM, unsolicited<unsolicited at swiz.ca>  wrote:
>> Darcy Casselman wrote, On 10/21/2010 7:54 PM:
>>>
>>> I wish I had eSATA on my laptop.  That way I could put a disk image
>>> file on a spinning disk and see how that compares to the XP VM I've
>>> got running on the SSD on the same machine.
>>
>> (e)Sata should be slower. (Than SSD.) At least on reads?
>>
>> PCMCIA?
>>
>> Got an SD reader in it? e.g. Prices on 32GB have come way down, and on a
>> couple of laptops I've seen, SD is much faster than anything over USB. Not
>> sure of internal connections, think it's direct SATA not USB, so it may be
>> faster than eSata, and perhaps approaching SSD. WAGing here.
>
> I think you're confusing interface with storage tech.  Interfaces are
> (e)SATA, USB, PCMCIA, etc.  Then you have spinning disk (HDD) vs.
> solid state (SSD).  So, SSD over USB would be bottlenecked by the USB
> bus.  SSD over eSATA would be as fast as if it were internal. (eSATA
> is the same as SATA, except the connectors are more reliable)
>
> SD readers can be both USB and internal.  The internal ones are nice
> and fast, but the USB ones are bottlenecked by USB.
>
> Of course, when USB 3.0 becomes common and we get near-SATA speeds,
> this whole discussion is moot.
>
> Cheers,
>
> Eric
>
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