> Are Netapp using some kind of block checksumming? That seems to be one > of the big wins of ZFS compared to ordinary filesystems -- I have a > higher confidence that data I haven't accessed recently is still good. > If Netapp doesn't do something like that, that would explain why there's > frequently trouble reconstructing, and point up a major ZFS advantage.
Yes, they do. I don't think it's identical to ZFS, but is is similar. Here's a page from their website that describes it (without much detail). Given the comments, I doubt that the author was aware of ZFS when this was written. http://www.netapp.com/go/techontap/matl/sample/0206tot_resiliency.html The "trouble reconstructing" needs to be detected. And that's something that both WAFL and ZFS can do. Without the checksums, you might not even know there was a problem. -- Darren Dunham [EMAIL PROTECTED] Senior Technical Consultant TAOS http://www.taos.com/ Got some Dr Pepper? San Francisco, CA bay area < This line left intentionally blank to confuse you. > _______________________________________________ zfs-discuss mailing list zfs-discuss@opensolaris.org http://mail.opensolaris.org/mailman/listinfo/zfs-discuss
