Linux Cache

Linux have feature cache that should make everything runs better for multiple process call. But in some condition the cache could not been flushed as more application need it.

You can run this command, to clear the caches, so freeing up much memory:

sync; echo 3 > /proc/sys/vm/drop_caches

Moving Mac OS X Data and OS to new HardDrive

Today i'm just have a new expereience in replacing Powerbook G4 Harddrive with a new one.
At first, you can use USB Harddrive adapter for the new harddrive then boot normally to the Mac OS X. The Powerbook that I use is still on version 1.5.4 (Tiger).

Then according to some tutorial you can use Carbon Copy Cloner or SuperDuper!.
Just copy all the entire Harddrive contetnt of the OS to a new one that connected via USB.

Some tricky part, as I was using Carbon Copy Cloner, it tell that the Powerbook G4 could not boot via USB, thus it may not setting up the Boot media on the target Harddrive.

To enable the target harddrive as boot media, you have to bless it. (BSD derivative, bless is to Set volume bootability and startup disk) The command is:

sudo bless -folder /Volumes/TARGET VOLUME NAME/System/Library/CoreServices

Now the target harddrive is bootable from your powerbook, and you can continue to exchange the harddrive.

Additional note:
Instead of using Carbon Copy Cloner or SuperDuper!, you can copy all the content of your harddrive with command:

sudo asr -source /Volumes/OSX BOOT VOLUME NAME/ -target /Volumes/TARGET VOLUME NAME/

The command will resulted:

asr: did not copy blessed information to target, which may have missing or out-of-date blessed folder information.

And it's normal, just continue with blessing the target harddrive with previous command.