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Old 03-20-2003, 09:19 PM   #1
Phantom Rayne
Registered: Mar 2003
Location: not quite shure...iv never left my computer to look
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Lightbulb <<<<<<<ext2 <vs> ext3>>>>>>>

ok so im new.......very i was wondering wether ther is an adrantage of using ext3? i know it adds journaling(not a clue what that is...)
Old 03-20-2003, 09:35 PM   #2
LQ Guru
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yes it is much more forgiving if your system locks up or gets powered off without shutting down properly.

The journal keeps up with changes to the disk so it can be repaired. It boots much quicker after a problem occurs with improper shutdown.
Old 03-20-2003, 09:38 PM   #3
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As far as I know, ext3 is simply ext2, with journaling.

My grasp of what journaling is is hazy at best, but from what I gather, Linux's filesystem uses a sort of RAM-caching for stuff that would ordinarily get written to disk. This makes it fast and efficient, but it also means that if your computer crashes (due to a power outage or something - since Linux never crashes ), some of the stuff that was supposedly written to disk never actually made it to disk, but was only in a cache in RAM.

The result is that some bad hard drive errors can pop up when you boot up again, and you may have to run fsck and other nasty stuff, and could even lose important data.

Journaling makes it so a crash won't cause any loss of data.

As I said, my grasp of it is hazy You could probably do some google searching and turn up some more technical information.

Anyhow, in short, it's a good idea to use ext3 if your kernel supports it (which it most likely does). You can convert ext2 to ext3 really easily by typing:

tune2fs -j /dev/hdaX

(turns on journaling for hdaX)


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