On Sun, Dec 03, 2000 at 06:21:49PM +0000 or so it is rumoured hereabouts,
Niall O Broin thought:
> On Sun, Dec 03, 2000 at 02:51:02PM +0000, Thomas Ribbrock wrote:
>> > Now - does anybody happen to know how these drives could be "self healing"?
>> SCSI drives (if they have not always been, they certainly have been for a
> long time) are "self healing". SCSI drives do not expose their internal
> layout to the outside world, presenting themselves instead as a big box of
> data blocks (as you can see from 'dev 08:21, sector 2496262').
>> When the disk itself detects an impending media error e.g. if it has to
> re-read a block to get its data it will put the data from that block onto
> another block and will remap that block internally. I'm not sure here, but I
Happens with IDE drives also. That's why the list of bad blocks no longer
appears on the drive case. Bad news though, since it's not easy to see if
a drive is about to fail since you almost *never* get bad blocks on the
drive or at least, the OS never sees them...
--
Conor Daly <conor.daly at oceanfree.net>
Domestic Sysadmin :-)
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