Date: Mon, 9 Apr 2007 20:40:12 GMT From: Jan Srzednicki <w@wrzask.pl> To: freebsd-bugs@FreeBSD.org Subject: Re: bin/111146: fsck fails on 6Tfilesystem Message-ID: <200704092040.l39KeCAF083595@freefall.freebsd.org>
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The following reply was made to PR bin/111146; it has been noted by GNATS. From: Jan Srzednicki <w@wrzask.pl> To: Dan D Niles <dan@more.net> Cc: bug-followup@FreeBSD.org Subject: Re: bin/111146: fsck fails on 6Tfilesystem Date: Mon, 9 Apr 2007 22:39:52 +0200 On Mon, Apr 09, 2007 at 03:30:23PM -0500, Dan D Niles wrote: > On Mon, 2007-04-09 at 22:13 +0200, Jan Srzednicki wrote: > > That's kinda strange, dumpfs never did that to me. It appears to me > > that > > this filesystem has got quite severely corrupted. Did you try newfs on > > it? > > Not yet. I'd like to figure out why I can't fsck it first. Running > newfs on your backup disk is not a viable solution. There is data I > cannot pull of the disk. If my primary storage had crashed also, I'd be > hosed. Well, you need to take into the account that your data may be hosed. Backup your primary storage NOW. :) > > And another thing: try tuning up the -i, -f and -b parameters to > > newfs. > > I assume that on such a big filesystem average filesize will be much > > bigger than the "UNIX default" (10k), so you can safely set these to > > their maximums (and allocate inodes more scarcely). > > Running df reports 8683374 inodes used and 784218256 free. This could > be wrong since the filesystem is dirty and mounted ro. > > FreeBSD's newfs scales things automatically, though perhaps not enough: It does not scale anything. Last time I checked (a few years ago) even the -g option did not make any difference either, so I had to tune things up manually with -i, -f and -b. > tunefs: maximum blocks per file in a cylinder group: (-e) 2048 > tunefs: average file size: (-f) 16384 > tunefs: average number of files in a directory: (-s) 64 > tunefs: minimum percentage of free space: (-m) 8% > tunefs: optimization preference: (-o) time These are the default values for any filesystem, regardles of it's size. -- Jan Srzednicki :: http://wrzask.pl/ "Remember, remember, the fifth of November" -- V for Vendetta
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