-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 Ric Wheeler wrote: > > Christian Kujau wrote: >> On Mon, 31 Mar 2008, kgp wrote: >>> How ReiserFS manages bad blocks? >> >> Is reiserfsck's --badblocks option helpful? >> >>> If it is not supporting bad block management, plz tell me the >>> approches we >>> can use to implement bad block management in any file system. I am >>> implementing bad block manager for UDF. I want some inputs >> >> Doesn't "Spared UDF" already provide some kind of bad block management? >> >> C. > > I am not sure what you want to do with bad block management. > > With most modern disk drives, they will remap bad disk sectors > dynamically for you so the file system layer can stay out of the bad > block mapping business entirely. He's asking about UDF, though, so I'd imagine he's talking about optical media. It's even cheaper than disk though, so I guess I don't see the benefit. Reiserfs handles bad blocks by allocating the blocks input as "known bad" to special file that's inaccessible. It does _not_ do this automatically, and reiserfsck/mkreiserfs must be passed a list of blocks to allocate to that file. It also doesn't recover files that have been corrupted to the block failure. Ric's right about disk drives, though. They'll remap the bad sectors automatically at the hardware level. When you start to see bad sectors at the file system level, it means that the sectors reserved for remapping have been exhausted and you should replace the disk. - -Jeff - -- Jeff Mahoney SUSE Labs -----BEGIN PGP SIGNATURE----- Version: GnuPG v2.0.4-svn0 (GNU/Linux) Comment: Using GnuPG with SUSE - http://enigmail.mozdev.org iD8DBQFH8pJXLPWxlyuTD7IRAuX5AJ4xfX/hFL5i608lEZ9dBcXZ2cuxngCfTBq+ L0gkAhJOlbl4FUb7cgafaM8= =YqBe -----END PGP SIGNATURE----- -- To unsubscribe from this list: send the line "unsubscribe reiserfs-devel" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
