Re: File System conversion -- ideas

[rmoser <mlmoser@comcast.net>]

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

On 6/29/2003 at 2:55 PM David D. Hagood wrote:

>rmoser wrote:
>
>> 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
>>
>
>> 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!
>>
>
>
>Funny how, having never used LVM you have an opinion about it.
>
>I have. I have done EXACTLY what I described.
>
>First of all, do you REALLY think my way is any less failure prone,
>especially in the presence of the possiblilty of power failure than any
>other method? My method preserves a mountable, valid file system at each
>step of the way - the resized downward of the old file system, the
>resize upward of the new, the file copy.
>

Except for a crash at the precise moment that data is being written during
a resize of a partition in LVM or the filesystem iteself.  To my knowledge,
said operation is not journaled.

WTF is the doc for this?  wth do I have an incomplete Documentation/ tree
or something?  I dunno, maybe I read about LVM on some site or something.
It doesn't matter; it's been too many years since I've though about it or read
about it or even seen it.

>Secondly, if you are REALLY concerned about the manual aspect of what I
>suggested, you can write a simple shell script to do the work.
>
>Third of all, the longest parts of the process I describe will be the
>resize downward of the old file system and the copy of the data - the
>LVM parts of this operation are pretty damn quick.