Date: 15 Mar 2005 08:52:50 -0500 From: Lowell Gilbert <freebsd-questions-local@be-well.ilk.org> To: =?iso-8859-1?q?P=E1sztor_Rich=E1rd?= <ricsip@mailbox.hu> Cc: freebsd-questions@freebsd.org Subject: Re: Filesystem creation with integrated bad-block detection Message-ID: <44hdjd818t.fsf@be-well.ilk.org> In-Reply-To: <6.1.2.0.2.20050314004626.0270e450@mailbox.hu> References: <6.1.2.0.2.20050314004626.0270e450@mailbox.hu>
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P=E1sztor Rich=E1rd <ricsip@mailbox.hu> writes: > I wonder if it would be possible to implement under freeebsd an > interesting feature > which can be found in linux: >=20 > mkfs.ext2(8) > ....... > -c > Check the device for bad blocks before creating the file system. If > this option is specified twice, then a slower, destructive, read-write > test is used instead of a fast read-only test. > ... FreeBSD has some tools in this area (see, for example, badsect(8)), but they have largely atrophied. > I searched the archive for this subject, and i found that simple > answer that modern hard drives have > the so called spare sectors, and if they cant do these reallocations > transparently because they > ran out of those reserved sectors -> throw the drive into the trash. > But what abou using freebsd on older machines with hard drives that > dont support spare sectors? > Having a few bad sectors doesnt mean that a 4-5 Gb driver is useless > because one isnt able to mark those > few sectors. If the disk is multiple gigabytes, then it's unlikely to be old enough to lack spare sector support. IDE has been standard for a *long* time now, and from my experience, pretty much *every* IDE drive *ever* has come with block remapping turned on by default. See the FAQ entry on the subject: What do I do when I have bad blocks on my hard drive? http://www.freebsd.org/doc/en_US.ISO8859-1/books/faq/troubleshoot.html#AWRE
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