RFC 2005 - mounting two slices from 2 different disks to same mount point ;)

From: Odhiambo Washington (wash_at_wananchi.com)
Date: 03/24/05

  • Next message: Ken Hawkins: "Anyone installed urchin5? Shared object "libc.so.4" not found error" 
    Date: Thu, 24 Mar 2005 18:19:35 +0300
To: freebsd-questions@freebsd.org

    Hello Gang!

    On FreeBSD 5.3-RELEASE, we have mounted slices as follows:

    -bash-2.05b$ mount
    /dev/ad0s3a on / (ufs, local)
    devfs on /dev (devfs, local)
    /dev/ad0s3e on /tmp (ufs, local, soft-updates)
    /dev/ad0s3f on /usr (ufs, local, soft-updates)
    /dev/ad0s3d on /var (ufs, local, soft-updates)
    devfs on /var/named/dev (devfs, local)
    /dev/ad0s5 on /drive_d (msdosfs, local)
    /dev/ad3s1d on /tmp (ufs, local, soft-updates)

    /dev/ad0s3e was 500MB
    /dev/ad3s1d was 40GB

    In /etc/fstab, we specified the mount point for both to /tmp.

    We then wrote a 1GB file to /tmp and there was no error. The
    file was successfully written.

    Can an expert with disks tell me where the file was written?
    How did the system decide where to write the file? How did it
    "select" /tmp in this case?

    Linux guys have talked about "disk spanning" using the method
    we just tested. I am wondering the dangers I face doing such
    a thing!!

    Happy Easter to ye all!!

    -Wash

    http://www.netmeister.org/news/learn2quote.html 

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