HP-UX 11i v3 Read Before Installing or Updating, February 2007 (Initial Release)

Read/Write May Return EINVAL for Unaligned I/O
Across Multiple mmaps
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