P.S. needless to be said, that they eventually can reassemble damaged LVM , until LVM's metadata tables are still good enough
Il giorno 12 apr 2023, alle ore 08:39, Roland < devzero@xxxxxx> ha scritto:
>Controllers
remap blocks all on their own and the so-called geometry is
entirely fictitious anyway
so tell me then, why i have a shelf full with dead disks where
half of them are out of business for nothing but a couple of bad
sectors ?
i don't see the point that hardware capable storing terabytes of
data is being put to trash, because of some <0.01% of it's
sectors is defective for this or for that reason. it's that
"the vendor tells it's dead now - so please better buy a new
one" paradigm, which seems to rule everewhere today.
i dislike this attitude.
if you had a self healing diving suit which quits healing itself
after the 5th small hole, would you throw that away after the
5th hole - or would you put a patch on that? same goes for
bicycle inner tubing. there were times, where you put patches on
that because new ones where expensive. nowadays, everbody puts
them to trash and buys a new one.
so, if some drive controller isn't able to fix your 20 broken
sectors - i'd like to fix it myself. and i'd like to try the lvm
apporach, because i think it's a sensible way of putting some
abstraction layer between your filesystem and your rotating
disks.
and even if it's dumb to do or if it's something which will not
succeed , it's at least worth a try to show if it works or show
why it can't work - and if it doesn't work - there is at least
something to learn about lvm or dead disks.
roland
Am 09.04.23 um 22:18 schrieb matthew
patton:
> my plan is to scan a disk for usable sectors
and map the logical volume
> around the broken sectors.
1977 called, they'd like their
non-self-correcting HD controller implementations back.
From a
real-world perspective there is ZERO (more like negative)
utility to this exercise. Controllers remap blocks all on
their own and the so-called geometry is entirely
fictitious anyway. From a script/program "because I want
to" perspective you could leave LVM entirely out of it and
just use a file with arbitrary offsets scribbled with a
"bad" signature.
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