On Tue, Nov 02, 1999 at 01:56:06PM +0100, Egon Eckert wrote:
> > There's a new version of the raidreconf utility out. I call it 0.0.2.
>
> Isn't this what supposed 'LVM' to be about? (BTW there seem to be 2
> different implementations of LVM on the web -- one included in 0.90 raid
> patch and one on http://linux.msede.com/lvm/)
Well, yes and no. LVM gives you pretty much the same features, the ability
to add disks to a device to grow it.
The only reason I started the raidreconf utility was, because I needed to be
able to add/remove disks from RAID arrays *today*. LVM is, from what I can
understand, still not implemented to a state where you can use it and rely
on it. I know I can rely on the RAID code in the kernel, so all I was missing
was a utility to add/remove disks from RAID sets. Now I have one, at least
for RAID-0 :)
While I'm at it, I hope to build in some conversion features too, so that you
can convert between RAID levels. The utility can already convert a single
block device into a RAID-0, but being able to convert a five disk RAID-0 into
eg. a seven disk RAID-5 would be pretty sweet I guess. Remember, this is all
functionality that, once raidreconf works, is perfectly stable and well tested,
because all the ``real'' support for the RAID levels has been in the kernels or
at least the patches for a long time now.
> Can someone clarify this?
>
> A few months ago I asked what's the 'translucent' feature as well, but no
> reply.. :(
I would actually like to know about the state of LVM, HSM, and all the other
nice storage features being worked on in Linux. I wouldn't want to spend time
on this utility if it was entirely redundant. But then again, I don't think it
is, at this time. Hopefully, in a year or so, nobody will care about
raidreconf, because we have LVM working and providing even more features. Or
maybe some raidreconf code could be used for the LVM for providing the
conversion features.
Time will show :)
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