Patch Name:  PHKL_10199

Patch Description: s700 10.20 Fix for JFS V3 >64Gb file system corruption

Creation Date: 97/02/26

Post Date:  97/03/18

Hardware Platforms - OS Releases:
        s700: 10.20

Products: N/A

Filesets:
        JournalFS.VXFS-BASE-KRN

Automatic Reboot?: Yes

Status: General Superseded

Critical:
        Yes
        PHKL_10199: CORRUPTION

Path Name:  /hp-ux_patches/s700/10.X/PHKL_10199

Symptoms:
        PHKL_10199:
        10.20 JFS version 3 file system returns the following file
        allocation error on file systems large than 64Gb before the
        file system is actually full:

        vxfs: msg001: vx_nospace - /dev/vgXX/lvolY file system full
                        (1 block extent)

        The following console message may also be seen:

        vxfs: mesg 003: vx_mapbad - /dev/vgXX/lvolY file system
                        free extent bitmap in au nnnn marked bad

Defect Description:
        PHKL_10199:
        The bug is in the allocation and freeing of entire
        allocation units on file systems larger than 64Gb in JFS
        version 3. When calculating the buddy allocation unit to
        allocate and free, the code fails to add back in the map
        section that it subtracts out earlier, causing the summary
        of the wrong AU to be updated. The incorrect values in
        AU summaries and all higher level summaries lead to the
        allocation failure.

SR:
        4701344515

Patch Files:
        /usr/conf/lib/libvxfs_base.a(vx_alloc.o)

what(1) Output:
        /usr/conf/lib/libvxfs_base.a(vx_alloc.o):
                vx_alloc.c  $Date: 97/02/25 09:49:23 $ $Revision: 1.
                        5.98.13 $ PATCH_10.20 (PHKL_10199)

cksum(1) Output:
        341595189 28236 /usr/conf/lib/libvxfs_base.a(vx_alloc.o)

Patch Conflicts: None

Patch Dependencies:  None

Hardware Dependencies:  None

Other Dependencies:  None

Supersedes:  None

Equivalent Patches:
        PHKL_10200:
        s800: 10.20

Patch Package Size:  80 Kbytes

Installation Instructions:
        Please review all instructions and the Hewlett-Packard
        SupportLine User Guide or your Hewlett-Packard support terms
        and conditions for precautions, scope of license,
        restrictions, and, limitation of liability and warranties,
        before installing this patch.
        ------------------------------------------------------------
        1. Back up your system before installing a patch.

        2. Login as root.

        3. Copy the patch to the /tmp directory.

        4. Move to the /tmp directory and unshar the patch:

                cd /tmp
                sh PHKL_10199

        5a. For a standalone system, run swinstall to install the
            patch:

                swinstall -x autoreboot=true -x match_target=true \
                        -s /tmp/PHKL_10199.depot

        5b. For a homogeneous NFS Diskless cluster run swcluster on the
            server to install the patch on the server and the clients:

                swcluster -i -b

            This will invoke swcluster in the interactive mode and
            force all clients to be shut down.

            WARNING: All cluster clients must be shut down prior to the
                     patch installation.  Installing the patch while the
                     clients are booted is unsupported and can lead to
                     serious problems.

            The swcluster command will invoke an swinstall session in which
            you must specify:

                alternate root path  -  default is /export/shared_root/OS_700
                source depot path    -  /tmp/PHKL_10199.depot

            To complete the installation, select the patch by choosing
            "Actions -> Match What Target Has" and then "Actions -> Install"
            from the Menubar.

        5c. For a heterogeneous NFS Diskless cluster:

                - run swinstall on the server as in step 5a to install
                  the patch on the cluster server.

                - run swcluster on the server as in step 5b to install
                  the patch on the cluster clients.

        By default swinstall will archive the original software in
        /var/adm/sw/patch/PHKL_10199.  If you do not wish to retain a
        copy of the original software, you can create an empty file
        named /var/adm/sw/patch/PATCH_NOSAVE.

        Warning: If this file exists when a patch is installed, the
                 patch cannot be deinstalled.  Please be careful
                 when using this feature.

        It is recommended that you move the PHKL_10199.text file to
        /var/adm/sw/patch for future reference.

        To put this patch on a magnetic tape and install from the
        tape drive, use the command:

                dd if=/tmp/PHKL_10199.depot of=/dev/rmt/0m bs=2k

Special Installation Instructions:  None