Patch Name:  PHKL_11304

Patch Description: s700 9.0[357] PC floppy cumulative patch

Creation Date: 97/06/09

Post Date:  97/06/13

Hardware Platforms - OS Releases:
        s700: 9.03 9.05 9.07

Products: N/A

Filesets:
        KERN-BLD

Automatic Reboot?: Yes

Status: General Release

Critical:
        No (superseded patches were critical)
        PHKL_7626: CORRUPTION
        PHKL_7609: CORRUPTION

Path Name:  /hp-ux_patches/s700/9.X/PHKL_11304

Symptoms:
        PHKL_11304:
        Geometry problem reports that media with 77 tracks has 80
        tracks, but you cannot write to tracks 78, 79, and 80.

        PHKL_7626:
        Silent data loss.  Requires manual readback & compare to
        detect.

        PHKL_7609:
        Silent data loss, requires manual readback compare detection

        PHKL_4704:
        pc_floppy cannot mediainint 2DD disk on faster 700s

        PHKL_4571:
        timeouts when mediainiting floppies

        PHKL_3946:
        pc_floppy device cannot mediainit 2DD (720KB) disks due to
        timing problems

Defect Description:
        PHKL_11304:
        Using floppy media with 77 tracks, the ioctl commands will
        report 80 tracks, but you cannot write to the last tracks.

        PHKL_7626:
        "uname" in a tight loop (or any other access to the PDC)
        while comparing data read and written to the floppy will
        easily reproduce the data loss.  In this case, the data loss
        is caused by overflow of the floppy DMA buffer when
        interrupts are not serviced fast enough.

        PHKL_7609:
        copying known good data to a PC floppy with cpio or dd while
        running uname in a tight loop and comparing data written to
        and read from the floppy will easily reproduce the silent
        data loss.

        PHKL_4704:
        Fixes a bug where low-density floppies could not be
        mediainit'd.

        The problem had to do with timing conditions with the PC
        floppy device.  It appeared that the floppy device would
        sometimes interrupt after a transaction before it had its
        act together.  If the processor turned around and
        immediately asked for results the device wouldn't respond.
        The faster the processor speed the more this problem
        appeared.  The fix was to add some delays if the driver
        detected that the floppy was not ready.

        PHKL_4571:
        Fix a mediainit problem for 9.05.  This patch fixes a
        timeout problem that happens when mediainiting floppies.
        PHKL_4571 incorporates the fix from PHKL_3946, and adds
        the 712/80.

        PHKL_3946:
        Special field supported patch to resolve mediainit problem
        on 712/80i system while trying to use the 720 Kbyte media

        Note that this code change is not incorporated in the source
        tree.  Any later patch that touches pc_fdc.o will write over
        this patch.

SR:
        1653203448 5003167635 5003215483 5003321356

Patch Files:  
        /etc/conf/libhp-ux.a(pc_fdc.o)
        /etc/conf/libhp-ux.a(pc_floppy.o)

what(1) Output:
        /etc/conf/libhp-ux.a(pc_fdc.o):
                pc_fdc.c $Date: 97/06/06 14:04:26 $ $Revision: 1.2.6
                        1.13 $ PATCH_9.03 (PHKL_11304)
        /etc/conf/libhp-ux.a(pc_floppy.o):
                pc_floppy.c $Date: 97/06/06 14:05:21 $ $Revision: 1.
                        2.61.11 $ PATCH_9.03 (PHKL_11304)

sum(1) Output:
        52317 54 /etc/conf/libhp-ux.a(pc_fdc.o)
        64072 44 /etc/conf/libhp-ux.a(pc_floppy.o)

Patch Conflicts: None

Patch Dependencies:  None

Hardware Dependencies:  None

Other Dependencies:  
        PC Floppy drive and associated drivers must be installed

Supersedes:  
        PHKL_3946 PHKL_4571 PHKL_4704 PHKL_7609 PHKL_7626

Equivalent Patches:
        PHKL_9011:
        s700: 10.20

Patch Package Size:  100 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. Copy the patch to your /tmp directory and unshar it:

                cd /tmp
                cp patch_source/PHKL_11304 .
                sh PHKL_11304

        3. Become root and run update:

                /etc/update [-r [kernel_gen_file]] -s \
                        /tmp/PHKL_11304.updt PHKL_11304

        Update moves the original software to
        /system/PHKL_11304/orig.  Keep this file to recover from any
        potential problems.  You should move the .text file to
        /system/PHKL_11304 for future reference.

        To put this patch on a magnetic tape and update from the
        tape drive, use dd:

                dd if=PHKL_11304.updt of=/dev/rmt/0m bs=2048

Special Installation Instructions:  None