Can i use EXT4 on my AAO 110L with Karmic UNR?

Hi

Can i install Karmic UNR with EXT4 file system on my AAO 110L?

Thanks

 

Don't see why not. I have a 110L with SSD and I'm running Kuki (which is basically ubuntu 9.04) with ext. 4. It runs fine, but it may have some tweaks that the stock UNR 9.10 doesn't include.

 

I have read that EXT4 with journaling reduces the life from SSD drives

 

Well, technically, any writing to the SSD reduces its life, and that would certainly include journaling. The question is, by how much? And what are the trade-offs of not using journaling? I don't know the answer to how much journaling reduces the lifespan of the SSD -- it's been debated over and over on this forum. I figure even if I could extend the life of the SSD by not using a journaling file system, my netbook will become obsolete pretty soon, anyway, so I just don't worry about seeing how long I can make it last. At some point my 1.5GB of RAM just won't be enough, or it will cost almost as much to replace the battery as the netbook is worth, or the 8GB SSD just won't be big enough to hold the next version of Ubuntu (or some other new distro that I want to try), so I'll save up my money and get a new netbook with better specs and lower price than I paid a year ago for my One. That's why having an SSD that lasts 10 years just isn't worth it for me.

What's more important is the performance hit you get with journaling. I used to use ext2 because I was afraid that ext3 would be too sluggish. (Sorry, I never actually tried it to see if there really was a difference.) But I am using ext4 now with journaling, and the performance is fine, at least for my usage.

 

Hi JimK,

Yes, kuki is an excelent choice for our machines.
I've tried ext2 and ext3 on the SSD of my AAO and ext3 was noticiably slower than ext2. Since I moved to ext4 I see no performance hit compared to ext2 (ok, I'm using also kuki's custom AAO kernel and thus I'm not sure about if ext4 without tweaks is as fast as ext2, but I suspect it is). Ext4 didn't get me a faster SSD, but give's me the advantages of journaling. And as you say, the decrease in life time is unimportant as the computer itself will be left aside before write cycles increase dictates its failure.

 

But using ext4 without journaling is an option, you can have ext4 perfomance without decrease SSD life time

http://thunk.org/tytso/blog/2009/03/01/ ... erelatime/

 

Yes, jango, that's certainly an option for Karmic Koala. Not so for 9.04, which uses an older version of kernel (2.6.28-16, I believe). I'll look into that whenever I upgrade.