can you guess? wrote: > CERN was using relatively cheap disks and found that they were more than > adequate (at least for any normal consumer use) without that additional level > of protection: the incidence of errors, even including the firmware errors > which presumably would not have occurred in a normal consumer installation > lacking hardware RAID, was on the order of 1 per TB - and given that it's > really, really difficult for a consumer to come anywhere near that much data > without most of it being video files (which just laugh and keep playing when > they discover small errors) that's pretty much tantamount to saying that > consumers would encounter no *noticeable* errors at all. >
I haven't played with bit errors in video. A bit error in a JPEG generally corrupts everything after that point. And it's pretty easy for people to have a TB or so of image files of various sorts. Furthermore, I'm interested in archiving those for at least the rest of my life. Because I'm in touch with a number of professional photographers, who have far more pictures than I do, I think of 1TB as a level a lot of people are using in a non-IT context, with no professional sysadmin involved in maintaining or designing their storage schemes. I think all of these are good reasons why people *do* care about errors at the levels you mention. One of my photographer friends found a bad cable in one of his computers that was upping his error rate by an order of magnitude (to 10^-13 I think). Having ZFS would have made this less dangerous, and detected it more quickly. Generally, I think you underestimate the amount of data some people have, and how much they care about it. I can't imagine this will decrease significantly over the next decade, either. -- David Dyer-Bennet, [EMAIL PROTECTED]; http://dd-b.net/ Snapshots: http://dd-b.net/dd-b/SnapshotAlbum/ 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
