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Comparison of 7500k and 10k RPM hard drive performance

I just bought a new Dell XPS with 2x700GB 7500 RPM drives (ST3750528AS) in a RAID 0 array, and I moved over my (very expensive) 2x300GB 15,000 RPM RAID 0 array. This seemed like a good time to compare the performance of 7500RPM  and 15kRPM drives.

Now, there is one big factor to consider besides the drive spin speed: The newer 700GB drives are more than twice as big as my older 300GB drives, which means their data is about twice as dense. Therefore, they should be able to read data about twice as quickly, if the RPMs were equal.

First, the older, 15k drives:


Connecting three monitors to one computer

A question from a reader:

I hate to bother you but I have been reading on the internet about the multi-screen topics you write about. If you have time to answer my question – I would greatly appreciate it.
I have been assigned what seems to be an impossible project – and given almost nothing as a budget.
My company want me to create a 3 TV set visual in our business.
I see where you write about similar set-ups – I had hoped you can give me some direction.
This is ULTIMATELY what I would like to make happen.
We have a computer that sits there and has little other purpose.
I would like to use this computer to drive 3 modern TV sets (which have perhaps VGA inputs). I see some links you provide to companies that make video splitting devices – but we would need the model that costs almost 2 thousand – which is my entire budget – so this won’t work. Anyway – I am looking for a cheap way to connect 3 TV sets to a computer AND have the computer to run 3 separate programs which will feed these 3 separate TV sets. I may be able to get this down to 2 TV’s – but 3 is the ultimate goal.
What have you seen or read about that is cheap that may be able to do what I need? I really would appreciate any advice you have on the subject.

And my answer:


Adding an External Monitor to a Laptop

A question from a reader:

Hi Tony, This is totally random, but I stumbled onto an article you wrote for a Microsoft blog like six years ago about how to run multiple monitors off of a laptop. Are you aware of any easier solutions available since that article came out? I bought this thing below, but it only allows for two monitors to display the same thing, rather than spreading the desktop across three screens (which is what I’d like to do.)

And my reply:


Find and Free Up that “Missing” Disk Space

A reader dropped a comment onto another page with a question that I’ve asked myself many times…

I wonder if you can help with this perhaps related problem. Running Windows Vista, it reports the hard drive has only 58 MB of free space. Adding up the folder sizes as shown in the properties window for each folder in Windows Explorer (including hidden folders), indicates that there are hundreds of GB of unused space.
When the limit is reached and there is no space left, by Windows reporting, no files can be saved.
It seems obvious that Windows’ reporting is faulty, but as it stops the saving of files, it cannot be ignored.
Any solution / suggestions?

Unfortunately, it’s not likely that Windows is simply lieing to you. More likely is that your technique of evaluating the disk space used by each folder is flawed. However, just to make sure Windows isn’t lieing, you can run a checkdisk at an administrative command prompt by following these steps (after the jump):


iPad Review

I bought a $700 64GB WiFi iPad, and it arrived a bit more than a week ago. Yet, I still feel like I’m waiting for my iPad to arrive.

I was promised an iPad that would revolutionize how I read magazines and books. It would bring the amazing Apple App Store experience to a bigger screen. It would serve my Web browsing needs at home and be my portable media player/game system on the road.

The iPad doesn’t do any of these things well, at least right now. Some examples:


Low Processor Frequency

Today my friend Jeff hit me up with an interesting question. His quad-core HP DL585 is supposed to operate at 3.4 GHz, but Performance Monitor was showing it running at 82% of the maximum frequency–2.8 GHz.

My first thought was that the difference was the metric AMD uses to make it easier to compare their processors to Intels higher-frequency chips–and I was really wrong. When I investigated the Performance Monitor counters Jeff was looking at, I discovered a counter I hadn’t used before: Processor Performance\% of Maximum Frequency, as shown above.


CD/DVD Disappears After Upgrading to Windows 7 (How to Fix)

A question from a reader:

hello, i recently purchased windows 7 for my father because of all the problems he has had with vista, everything is fine with the package only windows media player now doesnt recognise that we have a cd/dvd burner drive built in to our laptop. it simply says connect a burner and restart, please could you offer some advice or help please