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    SubjectRe: File System conversion -- ideas

    *********** REPLY SEPARATOR ***********

    On 6/29/2003 at 8:50 AM David D. Hagood wrote:

    >This is a place where logical volume management can help.
    >For example, suppose you have a 60G disk, 55G of data, in ext2, and you
    >wish to convert to ReiserFS.
    >Step 1: Shrink the volume to 55G. This requires a "shrink disk" utility
    >for the source file system (which exists for the major file systems in
    >use today).
    >Step 2: Create an LVM block in the remaining 5G.
    >Step 3: Create a ReiserFS in the LVM block.
    >Step 4: Move 5G of data from the ext2 system to the ReiserFS block.
    >Step 5: Shrink the ext2 volume by another 5G
    >Step 6: Convert that 5G into an LVM block
    >Step 7: Add that block to the ReiserFS volume group.
    >Step 8: Grow the ReiserFS.
    >Step 9: Repeat 4-8 as needed.

    Ass yourself for hours, each time risking making a typo and killing both
    filesystems, or risking having the LVM resize die from a powerdrop or a kick
    to the power button (sorry we don't all have immortal fault tolerance). I actually
    though about this one and figured it was too rediculously annoying to actually
    bring up :-p

    >This is why I'd really love to see LVM|EVM become standard, not just in
    >the kernel but in the distributions - if every distro by default made
    >all Linux volumes in LVM, then migrating data to bigger drives/adding
    >more space/converting file systems would be so much easier.

    I've never used LVM, but I'll look at it one day. If it's stable, that's good; I
    don't use Windows. I don't know exactly what LVM is but I have a pretty
    good idea; it's been forever since I read the doc on it, I forgot what it said!

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