Stephen C. Tweedie wrote: > Hi, > > On Tue, Apr 16, 2002 at 09:34:45AM -0700, Amit D Chaudhary wrote: > > >>Matt Bernstein wrote: >> > At 14:20 +0100 Stephen C. Tweedie wrote: >> >>More seriously, since 2.4.11, there's a page-cache/buffer-cache >> >>aliasing problem which can lead to this being hit in ext3 if you >> >>merely read from the buffered block device on which the fs sits. This >> >>can happen, for example, if you dump(8) a live filesystem. I've got a >> >>fix pending for the ext3 side of that problem, and have posted the >> >>core VFS fix to l-k. >> > >> > *blush* We dump our filesystems live. I bet we're not the only ones. >> > >>Short of lvm, is there any other way to backup a ext3 live filesystem, >>that is say one mounted as /, /usr, etc and have it as a clean(empty >>journal) backup copy? > > > rsync, tar etc. will all do backups well. rsync in particular is > pretty smart about doing copies between full filesystems. Thanks for reply. I assume this will go through the vfs cache filling it up for a one time operation. Is there any way of avoiding that, something like a raw i/o mechanism. REgards Amit
