Limitations of multiterabyte UFS file systems are as follows:
This feature is not supported on 32-bit systems.
You cannot mount a file system greater than 1 terabyte on a system that is running a 32-bit Solaris kernel.
You cannot boot from a file system greater than 1 terabyte on a system that is running a 64-bit Solaris kernel. This limitation means that you cannot put a root (/) file system on a multiterabyte file system.
There is no support for individual files greater than 1 terabyte.
The maximum number of files is 1 million files per terabyte of a UFS file system. For example, a 4-terabyte file system can contain 4 million files.
This limit is intended to reduce the time it takes to check the file system with the fsck command.
The maximum quota that you can set on a multiterabyte UFS file system is 2 terabytes of 1024-byte blocks.