Patch Name:  PHKL_6275

Patch Description: s700 9.01 SCSI megapatch

Creation Date: 95/11/01

Post Date:  95/11/02

Hardware Platforms - OS Releases:
        s700: 9.01

Products: N/A

Filesets:
        KERN-BLD

Automatic Reboot?: Yes

Status: General Release

Critical:
        No (superseded patches were critical)
        PHKL_2829: PANIC
        PHKL_1990: PANIC

Path Name:  /hp-ux_patches/s700/9.X/PHKL_6275

Symptoms:
        PHKL_6275:
        panic message showed 0x%x instead the actual device

        PHKL_3325:
        No kernel instrumentation for "monitor"

        PHKL_3226:
        No support for A32 VME SCSI cards

        PHKL_2898:
        Invalid SCSI sense data returned after a SCSI STATUS check
        condition

        PHKL_2829:
        panic when sense codes not identified by known table entries

        PHKL_2158:
        No kernel instrumentation for "monitor"

        PHKL_1990:
        panic: timeout table overflow
        panic: unrecoverrable deferred error

Defect Description:
        PHKL_6275:
        It was merely a coding typo.

        PHKL_3325:
        Turns back on kernel instrumentation for "monitor".

        PHKL_3226:
        Adds support for A32 VME SCSI cards.  A32 VME SCSI interface
        drivers are now support by SCSI services.

        PHKL_2898:
        Invalid SCSI sense data returned to SCSI pass-thru commands.

        An IF statement only checked "sctl_io->sense_xfer" before
        copying the per bus sense buffer.  If "sctl_io->sense_xfer"
        is not zeroed before the operation, the per bus sense buffer
        will be copied which in turn causes it to be cached.  If the
        per bus sense buffer is currently being used by another
        request, this will cause a cache consistency problem, which
        may result in invalid sense data being return to the device
        driver.

        Now "sctl_io->cdb_status" and "sctl_io->sense_status" are
        checked to determine if the per bus sense buffer is owned by
        this request before copying the sense buffer.

        PHKL_2829:
        When a C1520B tape drive (not a data compressed drive)
        attempts to read a data compressed tape written on a C1521B
        (data compressed drive) the system panics.  This is due to
        the fact that the C1520B tape drive returns a non-decodable
        SCSI sense code.  A bug in scsi_decode_as() forced an
        invalid pointer to be addressed if the sense code could not
        be decoded.

        This of course results in a system panic by de-referencing a
        null pointer.  The problem noted here could be caused by
        noise on the SCSI bus, or other indications.  It is not
        specific to tape drives, but merely reproducible in this
        specific instance.

        PHKL_2158:
        This patch adds the KI instrumentation that was removed in
        PHKL_1990, and ups the maximum merge size to 65536.

        PHKL_1990:
        This patch adds request merging to the SCSI disk driver.
        The disk driver will not do request merging for Stingray
        devices.

        This patch fixes a timeout table overflow panic that occurs
        when eisa_dma_setup calls made by the SCSI subsystem are
        failing a lot.  The problem has been observed on a system
        with several EISA SCSI cards with even more Stingrays
        attached running stress.

        This patch fixes an unrecoverrable deferred error panic
        caused by some TOSHIBA CD-ROM Drives in some situations.

        This patch eliminates the 2 Gbyte device size limit for
        disks.

        This patch fixes the post-store with trigger and no limit
        defect.

        This patch fixes a defect in scsi_opcode_decode which could
        result in a bogus pointer being dereferenced.

SR:
        1653054676 5003188391

Patch Files:  
        /etc/conf/libhp-ux.a(scsi_ctl.o)
        /etc/conf/libhp-ux.a(scsi_disk.o)

what(1) Output:
        /etc/conf/libhp-ux.a(scsi_ctl.o):
                scsi_ctl.c   $Revision: 1.2.81.9 $ $Date: 93/11/03 1
                        0:26:46 $ PATCH_9.01 (PHKL_3325)
        /etc/conf/libhp-ux.a(scsi_disk.o):
                scsi_disk.c  $Revision: 1.2.81.9 $ $Date: 95/11/01 1
                        6:42:53 $ PATCH_9.01 (PHKL_6275)

sum(1) Output:
        64186 138 /etc/conf/libhp-ux.a(scsi_ctl.o)
        29446 55 /etc/conf/libhp-ux.a(scsi_disk.o)

Patch Conflicts: None

Patch Dependencies:  None

Hardware Dependencies:  None

Other Dependencies:  None

Supersedes:  
        PHKL_1925 PHKL_1990 PHKL_2158 PHKL_2829 PHKL_2898 PHKL_3226
        PHKL_3325

Equivalent Patches:
        PHKL_5137:
        s700: 9.03 9.05 9.07

Patch Package Size:  160 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_6275 .
                sh PHKL_6275

        3. Become root and run update:

                /etc/update -s /tmp/PHKL_6275.updt PHKL_6275

        Update moves the original software to
        /system/PHKL_6275/orig.  Keep this file to recover from any
        potential problems.  You should move the .text file to
        /system/PHKL_6275 for future reference.

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

                dd if=PHKL_6275.updt of=/dev/rmt/0m bs=2048

Special Installation Instructions:  None