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Western Digital HDD spin down problem in Mac OS 10.6

January 1st, 2011

I’ve bought brand new Western Digital Scorpio Blue 750 GB SATA HDD for my MacBook laptop (as my secondary hard drive). It’s currently the maximum capacity you can get for standard height (9 mm), the 1000 GB model is taller and wouldn’t fit into my OptiBay which I use instead of CD drive.

There is one annoying issue with this drive in Mac OS and that is its aggressive power management which spin downs the drive immediately after last application stops accessing it. Not only causes this clicking sound every few seconds and excessive wear (spin up/down cycle count is limited), but also performance is really crappy, as application accessing the drive after spin down has to wait for drive to spin up again.
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iOpravna & Apple rulez!

June 16th, 2010

After 1.5 years my Macbook battery capacity dropped suddenly (only after about 130 cycles). I’ve contacted iOpravna.cz to ask whether it would be possible to get the battery replaced under my 3 year NBD warranty and they’ve sent technician to test the battery (at my place).

Result is positive: I’ve got new battery (for free) that allows me to work 4 hours again!

Good job!

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Java – print stack trace to a String

February 25th, 2010

Simple and quick one today - what if we need to print stack trace into a String?

PLAIN TEXT

JAVA:

...
catch (Exception e) {
StringWriter sw = new StringWriter();
PrintWriter pw = new PrintWriter(sw);
e.printStackTrace(pw);
pw.flush();
String stackTraceString = sw.toString();
//use the stackTraceString as you need...
}
...

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Instantiating Beehive JdbcControl manually

February 18th, 2010

Common usage pattern for Beehive Jdbc control is:

Create DB control class by extending JdbcControl
Declare DB control variable in page controller and use @Control annotation to have it automatically instantiated and injected
Use the DB control

The above works fine. But what happens if we would like to use our DB control class from within JSP page which is not part of our Beehive application and has no access to our controller?

The following text presents one possible approach.

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