Patch Name:  PHKL_6295

Patch Description: s700 10.00 Fix data corruption from DDS to shared memory

Creation Date: 95/11/07

Post Date:  95/11/14

Repost: 96/06/20
        The patch documentation was modified to classify the patch
        as Critical.

Hardware Platforms - OS Releases:
        s700: 10.00

Products: N/A

Filesets:
        OS-Core.CORE-KRN

Automatic Reboot?: Yes

Status: General Release

Critical:
        Yes
        PHKL_6925: CORRUPTION

Path Name:  /hp-ux_patches/s700/10.X/PHKL_6295

Symptoms:
        PHKL_6295:
        When data is copied from DDS tape to shared memory,
        incorrect data is found in the shared memory.

        PHKL_5279:
        Raw I/O incorrectly accounted to other processes in Glance.

Defect Description:
        PHKL_6295:
        The flush that happens after a read from device into shared
        memory to prevent the loss of valid data in cache was
        incorrectly implemented as a purge.

        PHKL_5279:
        Run Glance, and run dd or any command or test that read from
        a raw (char) disk, it shows in the disc usage screen that
        all the I/O are accumulated to a different pid, not the
        command or test that initiated the I/O.

SR:
        5003280636 D500190074

Patch Files:
        /usr/conf/lib/libhp-ux.a(vm_machreg.o)

what(1) Output:
        /usr/conf/lib/libhp-ux.a(vm_machreg.o):
                vm_machreg.c      $Revision: 1.13.91.5 $ $Date: 95/1
                        1/07 16:41:50 $ PATCH_10.0 (PHKL_6295)

cksum(1) Output:
        4133931775 13772 /usr/conf/lib/libhp-ux.a(vm_machreg.o)

Patch Conflicts: None

Patch Dependencies:  None

Hardware Dependencies:  None

Other Dependencies:  None

Supersedes:
        PHKL_5279

Equivalent Patches:
        PHKL_6296:
        s800: 10.00

        PHKL_6297:
        s700: 10.01

        PHKL_6298:
        s800: 10.01

Patch Package Size:  70 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_6295

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

                swinstall -x autoreboot=true -x match_target=true \
                        -s /tmp/PHKL_6295.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_6295.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.  The cluster clients
                  must be shut down as described in step 5b.

        By default swinstall will archive the original software in
        /var/adm/sw/patch/PHKL_6295.  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_6295.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_6295.depot of=/dev/rmt/0m bs=2k

Special Installation Instructions:  None