Re: any ideas to fix filesystem /var ? - "defrags?"

From: Chafik,Basim (Basim.Chafik_at_PLX.COM)
Date: 07/23/04

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    Date:         Fri, 23 Jul 2004 11:15:23 -0700
To: aix-l@Princeton.EDU

    File systems difragmentation

    The command "defragfs" is used to Increases a file system's contiguous free
    space.

    defragfs [ -q | -r ] { Device | FileSystem }

    The defragfs command increases a file system's contiguous free space by
    reorganizing allocations to be contiguous rather than scattered across the
    disk.
    You can specify the file system to be defragmented with the Device variable,
    the
    path name of the logical volume (for example, /dev/hd4). You can also
    specify it
    with the FileSystem variable, which is the mount point in the
    /etc/filesystems
    file.

    The defragfs command is intended for fragmented and compressed file systems.
    However, you can use the defragfs command to increase contiguous free space
    in
    nonfragmented file systems.

    You must mount the file system read-write for this command to run
    successfully.
    Using the -q flag or the -r flag generates a fragmentation report. These
    flags
    do not alter the file system.

    Flags

    -q Reports the current state of the file system.

    -r Reports the current state of the file system and the state that would
    result
    if the defragfs command is run without either -q or -r flag.

    -----Original Message-----
    From: Robert Miller [mailto:rmiller@SMUD.ORG]
    Sent: Friday, July 23, 2004 1:56 PM
    To: aix-l@Princeton.EDU
    Subject: Re: any ideas to fix filesystem /var ? - "defrags?"

    I'm pretty sure that defragfs is in the basic AIX install. You just run
    'defragfs /yourfs', and it'll defrag the FS for you. You can run it while
    the box is up, though it will probably place a non-negligible load on the
    disk.

    Not sure I see how that helps, unless as Simon has stated, since /var is
    pretty busy, those are spurious errors due to the fact that the filesystem
    was being written to when fsck was run, and you're thinking the FS is just
    fragmented...

    All defragfs does is compact the data and free up contiguous space on the
    disk.

    --rm

    -----Original Message-----
    From: IBM AIX Discussion List [mailto:aix-l@Princeton.EDU]On Behalf Of
    Leyden, Joseph
    Sent: Friday, July 23, 2004 10:35 AM
    To: aix-l@Princeton.EDU
    Subject: Re: any ideas to fix filesystem /var ? - "defrags?"

    has anyone used "defrags" ?
    where can I get this.
    Will it help?

    Joe

    -----Original Message-----
    From: IBM AIX Discussion List [mailto:aix-l@Princeton.EDU]On Behalf Of
    Chafik,Basim
    Sent: Friday, July 23, 2004 8:43 AM
    To: aix-l@Princeton.EDU
    Subject: Re: any ideas to fix filesystem /var ?

    Boot off CD. Go to maintenance mode. Access rootvg without mount file system
    and then run fsck

    Basim Chafik
    Senior Systems Analyst
    IBM Certified Advanced Technical Expert (CATE)
    1.800.688.4895
    basim.chafik@plx.com
    plexus (Division of BancTec)

    -----Original Message-----
    From: Leyden, Joseph [mailto:LeydenJ@METRO.NET]
    Sent: Friday, July 23, 2004 11:24 AM
    To: aix-l@Princeton.EDU
    Subject: any ideas to fix filesystem /var ?

    I get this:
    ----------------------------------------------------------------------------
    ------------
    $ fsck -p /dev/hd9var

    /dev/hd9var (/var): Bad Inode Map (NOT SALVAGED)
    /dev/hd9var (/var): Bad Block Map (NOT SALVAGED)
    /dev/hd9var (/var): Filesystem integrity is not guaranteed
    /dev/hd9var (/var): 458 files 20485 blocks 241659 free
    ----------------------------------------------------------------------------
    -------------
    any ideas in resolving it? TIA

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