On Sun, Dec 26, 1999 at 03:26:07PM -0500, Andy Poling wrote:
> On Sun, 26 Dec 1999, Johan Ekenberg wrote:
> > As I see it, either the HOWTO is wrong, Mr Berra is wrong, or I'm not really
> > understanding what the HOWTO is saying. In the first case it would be good
> > to correct/expand the HOWTO, in the other cases I would be very happy for a
> > clarification from Mr. Ostergaard or any other authority on RAID. I'm
> > currently using a swapfile on a RAID-5 device since I assumed this would
> > offer the best protection from a disk crash.
>
> Putting your swap on a RAID'd partition _should_ theoretically provide the
> best protection, but unfortunately, the way that software RAID handles
> re-synching (after loss of a disk, or simply after an unclean shutdown), it
> is not safe. You could consider this a bug or a design fault, but either
> way it rules out swapping on software RAID.
Am I correct in assuming that it is _ONLY_ under reconstruction that swapping
on RAID is not safe ?
I've been rather busy lately (still am) so I didn't read the bug report... Is this
reconstruction/swap bug present in all RAID levels (with redundancy of course) or
is it limited to RAID-5, -1, or -4 ?
> This problem really only came to light recently. Therefore the FAQ was
> written without knowledge of the problem...
Originally the HOWTO had a nice explanation as to why it was NOT safe to
swap on RAID, but then the bugs were corrected (the known ones at that time
at least) and the statement was corrected accordingly. I'll correct it once
again, as soon as I know exactly what to write :)
--
................................................................
: [EMAIL PROTECTED] : And I see the elder races, :
:.........................: putrid forms of man :
: Jakob Østergaard : See him rise and claim the earth, :
: OZ9ABN : his downfall is at hand. :
:.........................:............{Konkhra}...............:
