Guest
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 Posted:
Wed Dec 14, 2005 3:41 pm Post subject:
Does Interface (SATA) spec make a difference if hardware isn |
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Hello,
Sorry for the consumer q in this group, but what I want to know is,
does it make a difference if a faster interface, eg. SATA 2 comes out,
with 3Gb/s capacity, when the actual maximum physical speed of any hard
drive is about 60 megs/sec? i.e. if the SATA 1 spec is 150Gb/s, and a
SATA 2 drive comes out with a 100 megs/sec speed, won't that fit
comfortably into the SATA 1 slot, since it can handle that speed well
anyway?
Or does a SATA 2 drive give a 100megs/sec *on a 2 interface*, and
50m/sec on a 1?
Thanks.
(if this isn't the right group, does anyone know where to post to?) |
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robertwessel2@yahoo.com
Guest
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| Posted:
Thu Dec 15, 2005 1:15 am Post subject:
Re: Does Interface (SATA) spec make a difference if hardware |
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binary-nomad@hotmail.com wrote:
| Quote: | Hello,
Sorry for the consumer q in this group, but what I want to know is,
does it make a difference if a faster interface, eg. SATA 2 comes out,
with 3Gb/s capacity, when the actual maximum physical speed of any hard
drive is about 60 megs/sec? i.e. if the SATA 1 spec is 150Gb/s, and a
SATA 2 drive comes out with a 100 megs/sec speed, won't that fit
comfortably into the SATA 1 slot, since it can handle that speed well
anyway?
Or does a SATA 2 drive give a 100megs/sec *on a 2 interface*, and
50m/sec on a 1?
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comp.storage might be a better place.
Anyway, SATA throughput is on a per interface basis (subject to the
limitations of the implementation, of course - for example, a four port
SATA2 PCI card is still only going to support 33MB/s of total
throughput, no matter the capacity of the back side).
To a large extent, SATA2 currently has little, if any, advantage for a
single hard drive, because single drives don't have enough bandwidth to
make any real use of the faster interface. There is at least a
theoretical reduction in latency, and at least potentially when reading
from cache (on the drive), you might see better performance. But in
practical terms, there's little immediate benefit.
In RAID-type systems, where the entire array is behind a single SATA
interface, the improved speed is likely to be of more significance,
although that will likely apply more to SAS than SATA.
But for desktop systems, SATA2 is mostly about the future, as we all
expect that linear (track) density and rotational speeds will continue
to increase. |
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