Re: Disk /dev/md6 doesn't contain valid partition table
Francesco,
On Thu 30 October 2008 04:14, Francesco Pietra wrote:
> Then, let me ask about a raid1 devised mainly for the system than the
> data (once a calculation is finished, all files are sent to a desktop;
> no data remain in my home. This also because I need fast HDDs, while
> space on WD Raptor is very limited: 150GB each HDD). With so many
> applications that require a long compilation, a fault in the system is
> a terrible waste of time. It occurred to me, at the time I had raid1
> with two cheap HDDs. that one HHD suffered mechanical failure.
> Replaced, the system on raid1 was automatically restored.
>
> Which one of the kindly offered recipes for raid1 is the most suited
> to the above case? (that, I guess, is quite common - if not the norm -
> in computational chemistry, biology, etc).
From your point of view, I don't think it matters. Each method, with or
without LVM, is equally reliable. The advantage of LVM is just that it gives
you more administrative flexibility. Should you subsequently decide that one
volume (partition) is too small and another too large, you can resize them on
the fly--rather than having to backup the partitions, resize them, & then
restore the contents. Also, as someone on another group observed. Raid-1
provided redundancy and LVM adds striping.
Cheers!
cmr/anonymous
> Thanks
> francesco
>
> On Thu, Oct 30, 2008 at 4:01 AM, Alex Samad <alex@samad.com.au> wrote:
> > On Wed, Oct 29, 2008 at 11:07:36AM -0500, C M Reinehr wrote:
> >> Francesco,
> >>
> >> On Wed 29 October 2008 06:16, Francesco Pietra wrote:
> >> > On Wed, Oct 29, 2008 at 11:40 AM, Alex Samad <alex@samad.com.au> wrote:
> >> > > On Wed, Oct 29, 2008 at 08:24:55AM +0100, Francesco Pietra wrote:
> >> > >> On Wed, Oct 29, 2008 at 7:06 AM, Douglas A. Tutty
> >> > >> <dtutty@vianet.ca>
> >>
> >> wrote:
> >> > >> > On Wed, Oct 29, 2008 at 05:44:31AM +0100, Francesco Pietra wrote:
> >
> > [snip]
> >
> >> PS I agree with Alex regarding LVM2. I have only two partitions
> >> defined on my hard drives, one each for two md arrays. The first md
> >> device is for my boot partition. The second for everything else. The
> >> everything else, then, is managed by LVM2 with logical volumes for each
> >> seperate file system. LVM2 is a little intimidating but once up &
> >> running is much easier to manage.
> >
> > I usually go with 3
> >
> > 1 - 500M /boot
> > 2 - 20G for /
> > 3 - the rest for lvm.
> >
> > I like keeping the / fs on something simple especially if I have to
> > rescue it
> >
> >> --
> >> Debian 'Etch' - Registered Linux User #241964
> >> --------
> >> "More laws, less justice." -- Marcus Tullius Ciceroca, 42 BC
> >>
> >>
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--
Debian 'Etch' - Registered Linux User #241964
--------
"More laws, less justice." -- Marcus Tullius Ciceroca, 42 BC
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