Ubuntu 12.04 won't install due to odd partitioning

charles chris cccharlz-Re5JQEeQqe8AvxtiuMwx3w at public.gmane.org
Thu May 17 11:06:41 UTC 2012


I believe in KISS
What you are doing is the complete opposite to this philosophy.
Personally, I deploy images onto free space.

On Wed, May 16, 2012 at 2:48 PM, Lennart Sorensen <
lsorense-1wCw9BSqJbv44Nm34jS7GywD8/FfD2ys at public.gmane.org> wrote:

> On Wed, May 16, 2012 at 02:21:28PM -0400, D. Hugh Redelmeier wrote:
> > I don't think so.  The last (1024-byte) block in sda7 is 8195072:
> >
> >     root at redact:~# dd if=/dev/sda7 skip=8195071 of=/dev/null bs=1024
> >     1+0 records in
> >     1+0 records out
> >     1024 bytes (1.0 kB) copied, 9.192e-05 s, 11.1 MB/s
> >     root at redact:~#
> >
> > dumpe2fs says that there are 2048768 blocks in the filesystem.  I
> > presume that those are 4k blocks so that is the same as 8195072 1k
> > blocks.  Thus (not surprisingly) the filesystem is occupying the whole
> > partition.
> >
> > This fantasy of cylinders is past being funny.  For example, using
> > 255*63 guarantees that the second partition will not be aligned on a
> > 1024-byte boundary.  Very inconvenient for new disk drives that only
> > fake having 512-byte sectors.
> >
> > The GCD of the last two partitions' sector counts 4 so they don't seem
> > to have been allocated on the basis of some identical notional
> > cylinder size.  But I don't know if that is meaningful -- perhaps some
> > overhead sectors are not counted.
>
> No modern OS uses cylinder allignment.  Every OS these days uses 1MB
> allignment, cylinders be damned.
>
> --
> Len Sorensen
> --
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