Re: Removing disks from a volume

From: Aaron Sherman (ajs@ajs.com)
Date: Mon Aug 21 2000 - 16:48:12 EDT

  • Next message: Tom Haynes: "Re: Removing disks from a volume"

    On Mon, Aug 21, 2000 at 12:38:40PM -0700, Eyal Traitel wrote:
    > It would be lovely if there was such a RAID-filesystem...
    > If anyone have heard of such - share with us...

    As noted by another, Veritas is capable of this. I've included an
    excerpt from the docs, below:

    [begin vxassist man-page]
    NAME
         vxassist - create, mirror, backup, grow, shrink, and move
         volumes
    [...]
         shrinkto and shrinkby
              Decrease the length of the named volume to the length
              specified by newlength (shrinkto), or by the length
              specified by lengthchange (shrinkby). The new length
              or change in length is specified as a standard Volume
              Manager length [see vxintro(1M)]. The shrinkto opera-
              tion fails if the new length is not less than the
              current volume length.
    [...end]

    Of course, this only shrinks the whole volume, but it is my
    understanding that at that point, you can re-arange the plexes so that
    the disk you want to remove no longer has any plexes on it. It's ugly
    and complex, but possible. It strikes me as very strange that a system
    that's otherwise so flexible does not allow this. We've really hosed
    ourselves because on one Filer (while attempting to set up a volume
    that we could volcopy to), we accidentally added disks to the root
    volume. So, now we have to do what? Re-install?

    -- 
    Aaron Sherman
    Systems Architect
    HighWired.com -- The global high school community
    http://www.highwired.com
    

    300 North Beacon Street Watertown, MA 02472 (617) 926-1850 x238 (617) 926-1861 fax asherman@highwired-inc.com / ICQ#43677395 / Y!ajstrader

    "We had some good machines, but they don't work no more." -"Faded Flowers" / Shriekback



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