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Dell XPS M1530 - 5400 rpm SATA Harddrive too slow?

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Dell XPS M1530 - 5400 rpm SATA Harddrive too slow? adrianmachland@gmx.at 01-17-2008
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Posted by Dave Martindale on January 31, 2008, 2:47 pm
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alexmsuh@gmail.com writes:

>Hi Adrian,
>I am about to put in an order to purchase XPS M1530 with exact
>configuration. I need to decide between 320GB 5400rpm or pay $25 more
>fore 200GB 7200 rpm. Did you purchase the notebook? If so, do you
>like it? Could anyone give me suggestions? Thank you!

The 7200 RPM drive will have lower rotational latency; it just takes
less time for the data you want to rotate under the heads. It *might*
have faster seek times as well, since it's aimed at higher-performance
systems. But the data transfer rate is probably close to the same.

If you were comparing two 200 GB drives, the higher rotation rate would
generally provide a proportionally higher transfer rate. But the 5400
RPM drive has 1.6 times more space, so the bit density per track is
likely higher, and this also increases transfer rate.

The faster disk probably uses more power and generates more heat in
operation - though both drives probably shut down when idle.

Ultimately, how do you use a notebook? If, in normal use, the disk is
busy almost all the time and the CPU is mostly idle because it's waiting
for disk, the faster drive may be worthwhile. But if the disk is idle
most of the time (either running CPU-bound programs, or the whole
machine is mostly idle), you might as well have the larger slower disk.

        Dave

Posted by mike on January 17, 2008, 3:01 pm
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adrianmachland@gmx.at wrote:
> Hi everyone,
>
> I'm new here so I should actually introduce myself, but it is a very
> urgent question I have:
>
> I'm planning to buy a Dell XPS M1530, Core 2 Duo 2.2. GHz, 3 GB RAM
> and a 250 GB SATA 5400 rpm (14ms mean).
>
> I'm anxious that this harddrive might be too slow and actually present
> a performance bottleneck.
> Unfortunately, Dell doesn't offer an optional other HD on these
> machines.
>
> Does anybody have any, especially negative expereience with this type
> of harddrives? I'm most concerned about performance, but reliability
> is of course also an issue.
>
> Does anyone here actually have a direct comparison between the 7200
> rpm and the 5400 s Dell is offering nowadays in their notebooks?
>
> Thanks so much for your input.
>
> Adrian
I had to send my 7200RPM drive back for replacement. Used a 5400 in the
meantime. It's an uncontrolled experiment and there are many factors and
I don't have any numbers. Let's just say that I was really glad to get
back my 7200RPM drive. I don't normally do sustained read/writes where
the speed should matter. But the FEEL of the laptop was different by

more than I expected.
YMMV
mike

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