Oracle 10g Upgrade cluster failed

Today upgrade a 10g cluster environment to 10.2.0.5, download the patch package P8202632_10205_linux-x86-64.zip online, after decompression installation execution, midway error:

I/O ERROR cannt reading or opening file in/tmp/...../temp52

The online search information is as follows:

according to MOS , this error can occur for the following reasons:

A) Insufficient free space in the temporarydirectory.
b) Insufficient access rights on the temporary directory.
c) on the Oracle 9.2.0.5 to 9.2.0.8, a bug like bug:5614628.
D) not using a (local) console.
e) corrupted software set.
f) Setup of the Oracle software in the "stage area" on disk.
g) Wrong Unzip utility is used.
h) No Execute permission on Unzip utility
i) free space = 2Tb
j) During FTP from a Windows mounted DVD-to-Unix system (unzipped directories), the new directories in the "stage area" on Unix is all in lowercase.

Verification, the last found when the ZIP packet error, it seems that after the download file, it is best to checksum, just in case