On Sat, Aug 11, 2012 at 10:28 PM, Nadav Har'El <n...@math.technion.ac.il>wrote:
> On Sat, Aug 11, 2012, Erez D wrote about "which filesystem": > > hello > > > > i have and external USB hard-drive size 2TB, mounted as ext4. (ubuntu > 10.10 > > amd64) > > every time there is a power failure. i need to do a manual fsck on this > > disk. and this takes around an hour ... > > I have a 2 TB disk with ext3, and I don't have anything close to the 1 hour > boots you report (even one minute looks excessive). > > Both ext3 and ext4 are journalling filesystems, meaning that after power > failures, only a relatively small "journal" of the last modifications > needs to be replayed, rather than going through the entire disk. > > Is it possible your filesystem for some reason has journalling disabled, > or improperly configured? Try "tune2fs -l" on your filesystem and look > for suspicious parameters. Look at "Filesystem features" and verify > there is "has_journal". See that it doesn't force a full fsck every time > ("Maximum mount count" can very well be -1 and "check interval" 0). > > it fails fsck on boot, so i have to mount without it, and later do a manual fsck ( without -a or -p ) and this takes around an hour. see below for tun2fs -l output: erez@h53:~$ sudo tune2fs -l /dev/sdb3 tune2fs 1.41.12 (17-May-2010) Filesystem volume name: <none> Last mounted on: <not available> Filesystem magic number: 0xEF53 Filesystem revision #: 1 (dynamic) Filesystem features: has_journal ext_attr resize_inode dir_index filetype needs_recovery sparse_super large_file Filesystem flags: signed_directory_hash Default mount options: (none) Filesystem state: clean Errors behavior: Continue Filesystem OS type: Linux Inode count: 121069568 Block count: 484274688 Reserved block count: 24213734 Free blocks: 231623057 Free inodes: 117872828 First block: 0 Block size: 4096 Fragment size: 4096 Reserved GDT blocks: 908 Blocks per group: 32768 Fragments per group: 32768 Inodes per group: 8192 Inode blocks per group: 512 Filesystem created: Sat Sep 11 10:16:51 2010 Last mount time: Sat Aug 11 21:01:37 2012 Last write time: Sat Aug 11 21:01:37 2012 Mount count: 4 Maximum mount count: 32 Last checked: Sat Aug 11 13:24:22 2012 Check interval: 15552000 (6 months) Next check after: Thu Feb 7 12:24:22 2013 Reserved blocks uid: 0 (user root) Reserved blocks gid: 0 (group root) First inode: 11 Inode size: 256 Required extra isize: 28 Desired extra isize: 28 Journal inode: 8 Default directory hash: half_md4 Journal backup: inode blocks erez@h53:~$ > > -- > Nadav Har'El | Saturday, Aug 11 2012, 24 Av > 5772 > n...@math.technion.ac.il > |----------------------------------------- > Phone +972-523-790466, ICQ 13349191 |This signature was intentionally left > http://nadav.harel.org.il |boring. >
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