TMP所在文件系统剩余空间超过2TB，会导致安装失败，提示信息如下
Error in writing to directory /tmp/OraInstall......。Please ensure that this directory is writable and has atlesast 60MB of disk space.
OUI will not continue, even with -ignoresysprereqs option.
1）、/tmp may be either a partition, or a simple sub-directory
2）、/tmp has LOTS of free space, over 2Tb available, and only a small amount is used.
3）、/tmp is write-able by the Oracle account
32-bit Oracle process that is checking /tmp is failing since it is only capable of addressing 2Tb.
看情况是32位下存在的问题。由于我使用LVM并且没有手工分区，考虑到收缩/分区存在的风险，还是重新做了系统并分了10G给/tmp，记住这个教训了，很早之前就遇到过一次了。
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