PROBLEM:  (79218, 78973, 78888) (PATCH ID: OSF505-036)
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This patch fixes the following two problems in the I/O subsystem:
    - Only the first byte of the HSZ serial number is checked.
    - The time allowed for the command timeout on AIT tape
      drives is increased to from 5 seconds to 5 minutes.

PROBLEM:  (79365, 78896) (PATCH ID: OSF505-037)
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This patch fixes a problem in which a reboot will fail after hwmgr is used to
delete or add devices.

PROBLEM:  (79152, 79374) (PATCH ID: OSF505-035)
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This patch corrects a kermel memory fault caused by hwmgr.
A sample of the dump trace is as follows:

0 thread_block()
1 thread_preempt()
2 cms_flushbufs()
3 boot()
4 panic()
5 trap()
6 _XentMM()
7 find_proc_devnode()
8 hwc_kds_func()
9 kds_info_func()
10 getsysinfo()
11 syscall()
12 _Xsyscall()

PROBLEM:  (79395, 79178) (PATCH ID: OSF505-073)
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This patch fixes outcome of the command 'hwmgr -edit scsi' to make the SCSI
device a shared device on the shared SCSI bus.  Without this patch, each
instance of your "shared" device will appear to be a different device
in your system/cluster.

PROBLEM: (79881, 79692, 80152) (PATCH ID: OSF505-101)
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This patch fixes a panic during a multi-node reboot. The panic has the
following error message:  

        panic: lock_write
PROBLEM: (75386, UVO58439B) (PATCH ID: OSF505-133)
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This patch is to prevent an AdvFS domain panic
from occurring during the booting of a cluster member
after it has been added.  The type of AdvFS domain panic is
not specific but the panic will occur during the booting
process of a cluster node.


PROBLEM:  (79860) (PATCH ID: OSF505-075)
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This patch fixes the following CAM disk problems that occur occasionally
only durning heavy IO:
 - EPERM errors are reported to the application when a device is reopened.
 - A device may become unavaliable to DRD and will failover even if there
   is a viable path to the device.

PROBLEM:  (80755) (PATCH ID: OSF505-098)
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This patch fixes a problem such that when connectivity of a device is
restored in a cluster environment, the state of the paths to the device
may not be current.  The problem symptoms will be one or more of the
following:
        1.) Member node hang for a minute or more.
        2.) Member node does not become a server for the device
        3.) Persistent reservation not re-applied to the device.
PROBLEM: (81888) (PATCH ID: OSF505-145)
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This fixes a problem in 5.0A Initial Patch Kit where disks can become 
inaccessible on a cluster node because of the following message:
DRD barrier failed against 219 returned 60 (=ETIMEDOUT)


PROBLEM:  (79662, 79579) (PATCH ID: OSF505-066)
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This patch fixes a problem in which the SCSI_MC_GENERIC-READ_ELEMENT_STATUS
fails with an ioctl return status of -1 & "i/o error."
PROBLEM: (83309, BCGMA1FFX) (PATCH ID: OSF505-244)
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This patch fixes the corruption of the CAM hardware database
when using hwmgr. This typically can result in a kernel memory fault
when the database is being written to disk after a hwmgr operation.
>  0 stop_secondary_cpu   src/kernel/arch/alpha/cpu.c : 1003
   1 panic                src/kernel/bsd/subr_prf.c : 1222
   2 event_timeout        src/kernel/arch/alpha/cpu.c : 1668
   3 xcpu_puts            src/kernel/bsd/subr_prf.c : 1357
   4 printf               src/kernel/bsd/subr_prf.c : 892
   5 panic                src/kernel/bsd/subr_prf.c : 1287
   6 afault_trap          (source file cannot be determined)
   7 _XentUna             src/kernel/arch/alpha/locore.s : 2337
   8 kds_offset_next      src/kernel/io/common/kds.c : 4674
   9 kds_offset_next      src/kernel/io/common/kds.c : 4695
  10 kds_offset_next      src/kernel/io/common/kds.c : 4695
  11 kds_offset_lock      src/kernel/io/common/kds.c : 4818
  12 camdb_write_status   src/kernel/io/cam/camdb.c : 4113
  13 camdb_write_asynchronous  src/kernel/io/cam/camdb.c : 4164


PROBLEM: (83207, 83660, 83372, 83770,
          83668, 76843, 83207, 81784, 76147) (PATCH ID: OSF505-196)
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This patch fixes multiple problems with SCSI tape handling
including improvements to backup procedures, SCSI passthrough,
an increase to the local IO size for transfers, a fix for a system
crash that can occur during a bus reset and a fix for a panic with
the following panic string:
 "PWS_CCB_QUE_REMOVE: CCB NOT ON ANY LIST"


PROBLEM: (80807, 80883, 82108) (PATCH ID: OSF505-172)
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User data can become corrupted on hardware
configurations that use multiported parallel Fibre Channel storage arrays.


PROBLEM: (83908, 81908, 81669) (PATCH ID: OSF505-237)
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This patch fixes I/O timeouts that can occur on a cluster using
a Fibre Channel cable.  It also fixes a problem in which an 
application can get hard errors as a result 
of HSG80 multibus failover.