On Fri, June 4, 2010 03:29, sensille wrote: > Hi, > > I have a small question about the depth of scrub in a raidz/2/3 > configuration. > I'm quite sure scrub does not check spares or unused areas of the disks > (it > could check if the disks detects any errors there). > But what about the parity? Obviously it has to be checked, but I can't > find > any indications for it in the literature. The man page only states that > the > data is being checksummed and only if that fails the redundancy is being > used. > Please tell me I'm wrong ;)
I believe you're wrong. Scrub checks all the blocks used by ZFS, regardless of what's in them. (It doesn't check free blocks.) > But what I'm really targeting with my question: How much coverage can be > reached with a find | xargs wc in contrast to scrub? It misses the > snapshots, but anything beyond that? Your find script misses the redundant data; scrub checks it all. It may well miss some of the metadata as well, and probably misses the redundant copies of metadata. -- David Dyer-Bennet, d...@dd-b.net; http://dd-b.net/ Snapshots: http://dd-b.net/dd-b/SnapshotAlbum/data/ Photos: http://dd-b.net/photography/gallery/ Dragaera: http://dragaera.info _______________________________________________ zfs-discuss mailing list zfs-discuss@opensolaris.org http://mail.opensolaris.org/mailman/listinfo/zfs-discuss
