On Fri, 6 Nov 2015, Sami Tolvanen wrote: > On Fri, Nov 06, 2015 at 08:20:15PM +0100, Zdenek Kabelac wrote: > > i.e. you have 1G of space - you want to give 250MB as 'redundancy' - > > so create 4 partition.... > > We cannot afford to set aside 25% of read-only partition space for You can have 20 raid5 legs (with as big chunksizes as possible - so that sequential accesses are really sequential when they hit the flash device), and that means setting aside only 5%. Or even more legs. Mikulas > redundancy on mobile devices, and would rather not impact performance > any more than dm-verity already does. With error correction we have > 0.8% space overhead in our use case and no performance degradation if > the partition is not corrupted. > > Sami -- dm-devel mailing list dm-devel@xxxxxxxxxx https://www.redhat.com/mailman/listinfo/dm-devel
