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Two hosts sharing an array - Sun Solaris

I have 2 V120s running Solaris 9 that are both connected to an external disk array. I have modified the scsi-initiator on one to be 6 and left the other at 7. Both hosts see the array and can manipulate it. I have formatted and mounted the array on one host, info01, as read/write. On the second host, info02, the array is mounted read-only. Once again, I can see the array. Now here's the problem. If I create a file or directory on the array from info01, I don't see it on info02. If I umount the array on info02 ...

  1. #1

    Default Two hosts sharing an array

    I have 2 V120s running Solaris 9 that are both connected to an
    external disk array. I have modified the scsi-initiator on one to be 6
    and left the other at 7. Both hosts see the array and can manipulate
    it. I have formatted and mounted the array on one host, info01, as
    read/write. On the second host, info02, the array is mounted
    read-only. Once again, I can see the array. Now here's the problem.
    If I create a file or directory on the array from info01, I don't see
    it on info02. If I umount the array on info02 and then mount it
    again, the new data shows up. So far, this is the only way I can get
    it to work. Does anyone have any experience doing something like
    this? I was under the impression that I would be able to see the
    data on both hosts without problems. TIA!

    Nigel Nazir
    UNIX Systems Group
    University of Texas at Dallas
    edu
    Nigel Guest

  2. #2

    Default Re: Two hosts sharing an array

    In article <google.com>,
    edu (Nigel Nazir) wrote:
     

    This is massively unsupported and as you've found out, just plain won't
    work. I think what's going on here is that one of the systems must be
    the 'owner' or 'bus master' of the array. The other must wait until
    that 'owner' is done and reliquishes it.

    The only way to share a SCSI device is through some clustering
    mechanism--Veritas or SUN's. Unless you set this up for Oracle Parallel
    server and don't plan on running a UFS filesystem on it, you'll have to
    scrap this configuration. You can still connect both systems to the
    array, but only one can access it at a time--this includes READ-ONLY
    access. If you have a volume manager configured on both systems, you
    can import the filesystems on the other system when the primary system
    goes down.

    Use nfs instead to share the array to the other system.

    --
    DeeDee, don't press that button! DeeDee! NO! Dee...



    Michael Guest

  3. #3

    Default Re: Two hosts sharing an array

    In article <tdl.com>,
    Michael Vilain <net> wrote: [/ref]

     

    Not strictly true.
    Sun sells Sun StorEdge Performance Suite 4.0 (formerly QFS)
    which can be used instead of UFS and achieve what you want.
    (Multiple machines read-write the same file system data.)
     

    This is also a very decent proposal.

    /wfr
    Fredrik
    --
    Fredrik Lundholm
    dol ce.chalmers.se

    Fredrik Guest

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