On Dec 25, 2008 12:35 -0200, Alberto Bertogli wrote: > On Wed, Dec 24, 2008 at 06:49:15PM -0500, Theodore Tso wrote: > > I have no idea why you would need to do manual __breads(). No doubt > > I'm missing some context here. > > I'm writing (just for fun and learning purposes) a device mapper module > that stores checksums on writes and verifies them on reads. The > integrity metadata (currently just the checksum) is interleaved in the > backing device: one sector holding the integrity metadata for the > following 64 data sectors. Alex and I discussed implementing checksums for ext4 using an external device like this, and he might have some more design information for you. Cheers, Andreas -- Andreas Dilger Sr. Staff Engineer, Lustre Group Sun Microsystems of Canada, Inc. -- dm-devel mailing list dm-devel@xxxxxxxxxx https://www.redhat.com/mailman/listinfo/dm-devel
