HP-UX 11i v3 Installation and Update Guide, September 2007 (Update 1 Release)

Table A-1 Known Install and Update Problems (continued)
Description/ActionProblem
If VxFS 5.0 has been used to create file systems with disk layout
version 7, those disks will not be readable by the VxFS 4.1 for HP-UX
11i v3.
What To Do
Make sure you copy data from your DLV 7 file systems onto file
systems created at layout version 5 or 6 before updating to HP-UX
11iv3.
Updating to HP-UX 11i v3 from
HP-UX 11iv2 with VxFS 5.0
If you have created any VxFS file system with disk layout version 2
or version 3, these file systems cannot be mounted under VxFS 4.1
on HP-UX 11i v3.
What To Do
Use the vxfsconvert command to upgrade the disk layout to
version 4 before upgrading to VxFS 4.1 on HP-UX 11i v3. See the
Veritas 4.1 Installation Guide for more information on VxFS 4.1.
Updating to HP-UX 11i v3 from
HP-UX 11iv2 with VxFS 4.1
In some cases, a read(2) or write(2) may incorrectly return -1
with errno set to EINVAL.
What To Do
HP recommends patch PHKL_35936 be installed on all systems. For
information on this patch, go to the HP IT Resource Center Web site:
http://itrc.hp.com
Read/Write May Return EINVAL
for Unaligned I/O Across
Multiple mmaps
The evacd daemon can monopolize the CPU on a small vPar
configured with floating/ejectable memory. On such a system with
a workload which exhausts the file cache, the workload may run
slower than expected. A backup to tape is one such workload.
What To Do
You can try any of the following:
Reduce the tunable filecache_max from the default of 50 percent to
25 percent. If the problem still occurs, reduce the tunable further.
Remove the floating/ejectable memory from the vPar using
vparmodify before starting the operation that exhausts file cache.
The memory can be added back after the operation that exhausts file
cache completes.
Install the patches PHKL_35899 and PHKL_35900. For information
on these patches, go to the HP IT Resource Center Web site:
http://itrc.hp.com
CPU Monopolized By evacd
daemon During Tape Archiving
126 Known Problems and Troubleshooting