change sector size in EXT3

Jeremy Rumpf jrumpf at
Thu Aug 10 18:51:06 UTC 2006

I believe he's referring to the bytes-per-inode ratio (mke2fs -i 

At any rate, it still holds that the only way to change it is to backup the 
data, rerun mke2fs, and restore the data. 


On Wednesday 09 August 2006 16:18, Christian wrote:
> On Wed, 9 Aug 2006, paulvarjak at wrote:
> > The size of the partition is 1.5 Tb and the sector size is 32Mb. The
> hm, AFAIK ext3 is only aware of the "block-size" which can be 1024,
> 2048 or 4096 bytes per block. I'm not sure what this "32 Mb (Megabyte?
> Megabit?) sector size" might be...
> > I would like to change the sector size to 2Mb or 1Mb but I don't know if
> > it's possible to do it without loosing the data stored in the FS. I can
> > do
> If it's really the block-size you meant: no, it's not possible to change
> that without reformatting. The best you could do is to make a fresh
> backup, mkfs.ext3 with the right block-size, then play back the backups
> again.
> Christian.

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