Re: [PATCH][e2fsprogs] Allow user to disable Undo manager through MKE2FS_SCRATCH_DIR

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Theodore Tso wrote:

> (This will be merged into the patch "e2fsprogs: Make mke2fs use undo
> I/O manager" before the whole branch gets integrated into the next or
> master branches, using the magic that is git rebase --interactive.
> Also needing fixing is the code to hook into the profile lookup.)

What is the rationale for turning mke2fs into a nanny for
administrators, anyway?  Maybe to complete the transformation we should
just make it a gtk application with a windows-like "Are you sure? [Yes]
[No]" alert dialog box that pops up?

Seriously, what does this gain us, other than a slowdown of an
already-slow mkfs?  I'm sure there are stories of people who mkfs'd the
wrong device but there are a million sad stories out there; rm -rf /, dd
if=/dev/null of=/dev/sda, fdisk the wrong device, you name it.  We can't
save them all.  :)

The notion of an (optional) undo IO manager is fine in general, I like
the idea that if I have dicey fsck to do I can in theory recover from it
if it goes badly, though even there I'd personally rather not have it on
by default...  (how do I turn it off for fsck?)  But mkfs, by default -
really?  I don't much like it, and on my boxes I'd like a way to
permanently turn it off, regardless of whether I'm testing or not...
Sure I could put it in my .bashrc or whatnot, but really, what does this
gain us?

-Eric
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