Hi, On Thu, 2003-02-20 at 22:39, Robert Liu wrote: > I have a few questions regarding EXT3 and disk write back cache: > > 1. Will random power cycle cause data/metadata corruption on EXT3 running on > a hard disk with write back cache enabled? It might, unless the write-back caching still preserves the write ordering. > 2. Will random power cycle cause EXT3 corruption when running on top of an > md RAID5 device with disk write back cache enabled? Software RAID5 will *increase* your sensitivity to writeback caching effects, not reduce it. > 3. I understand Linux supports write barrier for IDE disks, does EXT3 > utilize write barrier? If so, will write barrier work for EXT3 running on > top of an md device? There have been patches proposed for barriers, but none that work on an md device, and they aren't in 2.4 at present. Cheers, Stephen _______________________________________________ Ext3-users@redhat.com https://listman.redhat.com/mailman/listinfo/ext3-users
