Re: raid1 with gmirror (some questions left)

From: Danny Howard (dannyman_at_toldme.com)
Date: 06/30/05

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    Date: Thu, 30 Jun 2005 13:16:38 -0700
To: "P.U.Kruppa" <root@pukruppa.de>

    P.U.Kruppa wrote:

    >
    > As far as I can see, booting from gm0 works fine. There are only two
    > questions left:
    > 1) I installed FreeBSD 5.4 -RELEASE and thus I put - as
    > recommended (or was that only for 5.3 ???) - swapoff="YES into
    > my /etc/rc.conf .
    > Now my raid1 device doesn't show any swap partition. Is this
    > o.k., or should it be reactivated somehow?

    Uhmmm, can you elaborate on that?

    Here's what my system looks like:

    0-13:14 djh@castor ~> gmirror list
    Geom name: gm0
    State: COMPLETE
    Components: 2
    Balance: round-robin
    Slice: 4096
    Flags: NONE
    SyncID: 2
    ID: 2016858745
    Providers:
    1. Name: mirror/gm0
       Mediasize: 250059349504 (233G)
       Sectorsize: 512
       Mode: r6w6e2
    Consumers:
    1. Name: ad4
       Mediasize: 250059350016 (233G)
       Sectorsize: 512
       Mode: r6w6e3
       State: ACTIVE
       Priority: 0
       Flags: DIRTY
       SyncID: 2
       ID: 2809681815
    2. Name: ad6
       Mediasize: 250059350016 (233G)
       Sectorsize: 512
       Mode: r6w6e3
       State: ACTIVE
       Priority: 0
       Flags: DIRTY
       SyncID: 2
       ID: 2997441133

    Geom name: gm0.sync

    0-13:14 djh@castor ~> mount
    /dev/mirror/gm0s1a on / (ufs, local)
    devfs on /dev (devfs, local)
    /dev/mirror/gm0s1g on /local0 (ufs, local, soft-updates)
    /dev/mirror/gm0s1e on /tmp (ufs, local, soft-updates)
    /dev/mirror/gm0s1f on /usr (ufs, local, soft-updates)
    /dev/mirror/gm0s1d on /var (ufs, local, soft-updates)
    0-13:14 djh@castor ~> swapinfo
    Device 1K-blocks Used Avail Capacity
    /dev/mirror/gm0s1b 4167488 0 4167488 0%

    > 2) In case one of my disks fails (let's say ad2), what is the
    > correct procedure to exchange it? My guess:
    > - power down my machine

    If you have hot-swap drive bays, you can skip this step.

    > - insert new disk
    > - # gmirror configure -a gm0
    > - # gmirror insert gm0 /dev/ad2
    > - wait until
    > # gmirror list
    > shows both disks active again

    You should only need the insert command, and you can certainly use the
    system while the disks are syncing, you'll just have impaired performance.

    Cheers,
    -danny 

    -- 
http://dannyman.toldme.com/
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