On 07 September, 2011 - Roy Sigurd Karlsbakk sent me these 2,0K bytes: > > http://wdc.custhelp.com/app/answers/detail/a_id/1397/~/difference-between-desktop-edition-and-raid-%28enterprise%29-edition-drives > > "When an error is found on a desktop edition hard drive, the drive will enter > into a deep recovery cycle to attempt to repair the error, recover the data > from the problematic area, and then reallocate a dedicated area to replace > the problematic area. This process can take up to 2 minutes depending on the > severity of the issue...." > > Or in other words: "When an error occurs on a desktop drive, the drive will > refuse to realize the sector is bad, and retry forever ...."
The common use for desktop drives is having a single disk without redundancy.. If a sector is feeling bad, it's better if it tries a bit harder to recover it than just say "blah, there was a bit of dirt in the corner.. I don't feel like looking at it, so I'll just say your data is screwed instead".. In a raid setup, that data is sitting safe(?) on some other disk as well, so it might as well give up early. So don't use desktop drives in raid and don't use raid disks in a desktop setup. Ofcourse, this is just a config setting - but it's still reality. /Tomas -- Tomas Forsman, st...@acc.umu.se, http://www.acc.umu.se/~stric/ |- Student at Computing Science, University of Umeå `- Sysadmin at {cs,acc}.umu.se _______________________________________________ zfs-discuss mailing list zfs-discuss@opensolaris.org http://mail.opensolaris.org/mailman/listinfo/zfs-discuss
