Patch Name:  PHKL_8502

Patch Description: s700 10.01 HSC SCSI tape cumulative patch

Creation Date: 97/01/24

Post Date:  97/01/30

Hardware Platforms - OS Releases:
        s700: 10.01

Products: N/A

Filesets:
        OS-Core.CORE-KRN ProgSupport.C-INC

Automatic Reboot?: Yes

Status: General Superseded

Critical:
        No (superseded patches were critical)
        PHKL_6568: PANIC
                Panic occurs only when using an unsupported device

Path Name:  /hp-ux_patches/s700/10.X/PHKL_8502

Symptoms:
        PHKL_8502:
        This patch changes the behavior of the open() call with
        write protected tape.  The open() will now fail with EIO
        if the mode is not O_RDONLY.

        PHKL_7953:
        This is a performance enhancement for tape drives attached
        to the GSC bus.

        PHKL_6568:
        The system will panic if an access is made to an Exabyte
        tape drive other than those models that are officially
        supported.

Defect Description:
        PHKL_8502:
        Before this patch the open() call did not look at media
        write protection.  A write() to a write protected tape
        would fail, but an open() with FWRITE mode would succeed.
        This change was made to make the HSC driver behave the same
        as the NIO driver.
        .

        PHKL_7953:
        No defect.  This patch provides for a performance
        enhancement for tape drives attached to the GSC bus.

        PHKL_6568:
        If a drive was found that had a manufacturer of Exabyte but
        was not one of the supported drives the product name got
        set to NULL.  Deferencing this NULL pointer later on
        caused a system panic.

SR:
        1653148098 4701329417 5003329078

Patch Files:
        /usr/conf/h/mtio.h
        /usr/conf/lib/libhp-ux.a(scsi_tape.o)
        /usr/include/sys/mtio.h

what(1) Output:
        /usr/conf/h/mtio.h:
                mtio.h $Date: 96/07/17 12:42:06 $ $Revision: 1.21.72
                        .17 $ PATCH_10.01 (PHKL_7953)
        /usr/conf/lib/libhp-ux.a(scsi_tape.o):
                scsi_tape.c $Date: 96/09/10 14:49:23 $ $Revision: 1.
                        2.72.24 $ PATCH_10.01 (PHKL_8502)
        /usr/include/sys/mtio.h:
                mtio.h $Date: 96/07/17 12:42:06 $ $Revision: 1.21.72
                        .17 $ PATCH_10.01 (PHKL_7953)

cksum(1) Output:
        3974266556 24167 /usr/conf/h/mtio.h
        809463066 59180 /usr/conf/lib/libhp-ux.a(scsi_tape.o)
        3974266556 24167 /usr/include/sys/mtio.h

Patch Conflicts: None

Patch Dependencies:  None

Hardware Dependencies:  None

Other Dependencies:  None

Supersedes:
        PHKL_6568 PHKL_7953

Equivalent Patches:
        PHKL_8503:
        s800: 10.01

        PHKL_8504:
        s700: 10.10

        PHKL_8505:
        s800: 10.10

        PHKL_8506:
        s700: 10.20

        PHKL_8507:
        s800: 10.20

Patch Package Size:  170 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_8502

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

                swinstall -x autoreboot=true -x match_target=true \
                        -s /tmp/PHKL_8502.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_8502.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_8502.  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_8502.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_8502.depot of=/dev/rmt/0m bs=2k

Special Installation Instructions:  None