> On 3/22/12, Vlad Dogaru <ddvlad@xxxxxxxxxx> wrote: >> On Thu, Mar 22, 2012 at 3:31 PM, Akshay Nehe <akshaynehe785@xxxxxxxxx> >> wrote: >>> Hello, >>> >>> Can we create file on ext4 file system which dose not uses extent >>> allocation? >> >> Man page of mkfs.ext4 suggests using "-O ^feature" to disable an ext4 >> feature. This seems to work: >> >> $ dd if=/dev/zero of=test1 bs=4M count=20 >> [...] >> $ mkfs.ext4 -F test1 >> [...] >> $ file test1 >> test1: Linux rev 1.0 ext4 filesystem data, >> UUID=408f6da2-c4ef-4335-9574-985f3a349ed2 (extents) (huge files) >> >> $ mkfs -O ^extent -F test1 >> [...] >> $ file test1 >> test1: Linux rev 1.0 ext4 filesystem data, >> UUID=23c046d6-db7a-419d-a1d5-0cba3c5b52d0 (huge files) >> >> Hope this helps, >> Vlad >> On Thu, Mar 22, 2012 at 9:59 AM, Akshay Nehe <akshaynehe785@xxxxxxxxx> wrote: > Thanks for help, i find it useful. > > -- > Regards, > Akshay Nehe. Akshay, 1) If you are going to participate in kernel mailinglists, you need to be aware the appropriate netiquette is to bottom post all responses. I have moved your reply to the bottom to make this flow better. 2) I assume you see it is a mkfs option that controls this. So you can't control it on a file by file basis as far as I know. I don't think you can even control it by re-mounting. Instead you have to reformat, so it is a fundamental change. Greg _______________________________________________ Kernelnewbies mailing list Kernelnewbies@xxxxxxxxxxxxxxxxx http://lists.kernelnewbies.org/mailman/listinfo/kernelnewbies
