Re: FAStT 600 and AIX

From: Wheelock, Michael D (Michael.Wheelock_at_INTEGRIS-HEALTH.COM)
Date: 07/31/03

  • Next message: Lawrence Clark: "Re: AIX equivalent to HP's 'glance' cmd?" 
    Date:         Thu, 31 Jul 2003 09:14:32 -0500
To: aix-l@Princeton.EDU

    Hi,

    We have a fastt 700 (basically same software and design, but certainly the
    same limitations on your question). Here is the skinny. What we are
    actually talking about are two different and separate phases.

    Phase 1
    Dynamic array expansion. This is the phase where you add a new physical
    unit to an existing array (which may contain multiple logical arrays). This
    creates "unused space" in the array which can be used to create logical
    arrays or expand existing ones.

    Phase 2
    Dynamic volume expansion. This is the phase where the volume/logical
    array/lun/hdisk gets expanded. We actually tested this with AIX 5.1 and
    5.2. According to the manuals I have read, dynamic volume expansion is
    possible on AIX 5.1 and 5.2. This is, however, a lie. AIX 5.2 is the only
    revision that is capable of DVE. The extra capacity is seen by running
    cfgmgr, but the second step is to adjust the logical volume to include more
    pp's. This involves the chvg -g command (which is only in 5.2). I actually
    placed a support call about this that was escalated to "engineering". They
    basically stated that the manual is wrong. On the other hand, in AIX 5.2 it
    works like a charm.

    Michael

    -----Original Message-----
    From: Peter McKay [mailto:Peter.McKay@INFINITY.CO.NZ]
    Sent: Wednesday, July 30, 2003 9:10 PM
    To: aix-l@Princeton.EDU
    Subject: FAStT 600 and AIX

    Good people,

    I'm trying to understand some of the technology in the FAStT storage
    management in regards to AIX. The marketing from IBM suggests that only
    Netware, Linux, Win2K Dynamic Disks, and Winnt4 logical disks on a FAStT
    array can be capacity expanded.

    If I expand a logical volume (on the FAStT) can I then utilize the extra
    capacity with AIX 5? My assumption is yes, because the Logical Volume
    Manager will see the extra capacity (may have to run cfgmgr) and will then
    be able to be expanded.

    Kind Regards,

    Peter McKay
    Technical Consultant
    Infinity Solutions
    Unit 3, 1 Show Place
    Addington, Christchurch
    Ph: (03) 9637965, Mob: (027) 2301884
    Fx: (03) 9637941
    www.infinitysolutions.co.nz <http://www.infinitysolutions.co.nz/>

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