Patrick O'Callaghan wrote: > On 12/11/10 1:13 PM, Michael Miles wrote: >> Considering that the LVM is a ext4 Virtual partition it seems to me >> that it would be easy to convert but there is no such beast out there >> Lots of stuff for converting ext3 to ext4 but nothing for what I need. > > This is pure speculation on my part, but I'm guessing one reason it's > hard is that the LVM layer knows nothing about the ext4 layer. The > ext4 layer contains lots of metadata (inodes, freelists, etc.) which > includes pointers to disk sectors or extents. In a physical partition > these point to real disk addresses but in an LVM partition they are > virtual (compare real with virtual memory for an analogy). From LVM's > viewpoint the entire ext4 fs is just disk sectors with random binary > data. The fact that some of this stuff is fs metadata and some isn't > means that a conversion tool would need to understand the ext4 > metadata to convert it. Of course if it's ext3 or xfs or btrfs etc. > then the same applies, with different rules for each one. > > Worse still, if you want a in-place conversion you have to be able to > do this in such a way that it's recoverable even after a hard system > crash in the middle of the conversion. And if you don't need it > in-place, you already have the solution as said before. > > Just my 2 cents. > > poc Agreed, I am just really surprised that Fedora would adopt this method of storage as it slows down the drive by a huge margin. That reason alone would say to me' No, don't want this" -- users mailing list users@xxxxxxxxxxxxxxxxxxxxxxx To unsubscribe or change subscription options: https://admin.fedoraproject.org/mailman/listinfo/users Guidelines: http://fedoraproject.org/wiki/Mailing_list_guidelines
