Re: File System > 64 GB

From: Mills, John T (9814) (John.T.Mills_at_ERAC.COM)
Date: 10/28/04

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    Date:         Thu, 28 Oct 2004 08:54:57 -0500
To: aix-l@Princeton.EDU

    Anyone have a jfs2 table handy or is it the same?

    John T. Mills

    -----Original Message-----
    From: IBM AIX Discussion List [mailto:aix-l@Princeton.EDU]On Behalf Of
    Ignacio Vidal
    Sent: Thursday, October 28, 2004 7:48 AM
    To: aix-l@Princeton.EDU
    Subject: Re: [aix-l] File System > 64 GB

    Excuse me Bill, are you sure?

    I got the following "helper table" from an AIX 4.3.3 system:

    0506-276 JFS file systems have the following size limitations:

      NBPI Minimum AG Size Fragment Size Maximum Size (GB)
       512 8 512, 1024, 2048, 4096 8
      1024 8 512, 1024, 2048, 4096 16
      2048 8 512, 1024, 2048, 4096 32
      4096 8 512, 1024, 2048, 4096 64
      8192 8 512, 1024, 2048, 4096 128
     16384 8 512, 1024, 2048, 4096 256
     32768 16 1024, 2048, 4096 512
     65536 32 2048, 4096 1024
    131072 64 4096 1024

    And I've defined several filesystems over 130GB with nbpi=32768.
    Is that a jfs limitation with AIX 5L?

    Best regards

    Ignacio

    > -----Mensaje original-----
    > De: IBM AIX Discussion List [mailto:aix-l@Princeton.EDU]En nombre de
    > Bill Verzal
    > Enviado el: Thursday, October 28, 2004 9:45 AM
    > Para: aix-l@Princeton.EDU
    > Asunto: Re: File System > 64 GB
    >
    >
    > JFS has a limitation of 64GB regardless of nbpi.
    >
    > BV
    >
    >
    > -------------------------------------
    > There's no place like /home
    >
    >
    > Bill Verzal
    > Project Leader, Komatsu America
    >
    > (847) 970-3726 - direct
    > (847) 970-4184 - fax
    >
    >
    >
    >
    >
    > glh@DAIRYNET.COM
    > Sent by: IBM AIX
    > Discussion List
    > To
    > <aix-l@Princeton. aix-l@Princeton.EDU
    > EDU>
    > cc
    >
    >
    > Subject
    > 10/27/2004 02:50 File System > 64 GB
    > PM
    >
    >
    > Please respond to
    > IBM AIX
    > Discussion List
    > <aix-l@Princeton.
    > EDU>
    >
    >
    >
    >
    >
    >
    > If I have a file system defined with nbpi=4096, is it true
    > that the maximum
    > file system size is 64 GB? If so, is there a way for me to
    > change nbpi on
    > the fly or do I have to redefine the file system (with a
    > larger nbpi value)
    > before I can go larger than 64 GB? Thanks.
    >
    > Gary Heilman
    > Dairyland Power Cooperative
    > 608-787-1408
    > glh@dairynet.com
    >

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