can i dd 2.5gb partition into 763mb????

linuxbh · 03-24-2005, 09:40 AM

hello friends

i have implemented lfs 5.1 completely using fedora core 1.

i have done implementation on 2.5gb partition ( /dev/hda7 on my hdd). now i want to make it on 763 mb ( /dev/hda6) so that i can create a single cd of my base system.

can i devicedump 2.5gb partition into 763mb using dd?

if possible is it necessary to do defragmentation of 2.5gb partition. and how shud i defragment it ....

thank you in advance

please do reply
linuxbh

please note: on 2.5 gb my lfs implementation has just taken 750 mb

nhs · 03-24-2005, 10:17 AM

Use resize2fs to resize the ext2/3 filesystem (use reiserresize (I think) for reiserfs) to shrink it (i.e. make sure that nothing beyond 760 Mb (for example) is used. Then copying the first 760 Mb should work. Once in the destination partition use resize2fs to expnd it to fit the partition and you're done.

shotokan · 04-04-2005, 01:59 PM

I think, Linux filesystem's 'unlike DOS, Win, and such' don't defragment because they don't need to.

nhs · 04-04-2005, 02:34 PM

They don't need defragmentation. All that resize2fs does is guarantee that no part of the filesystem extends beyond the given boundary and changing the filesystem's internal size field to prevent ext2/3 from allocating a block beyond that boundary subsequently.