bg | fg

NFS 

If the first attempt fails, retries in the background (bg) or in the foreground (fg). This option is safe for non-critical vfstab entries. The default is fg.

hard | soft

NFS 

Specifies the procedure if the server does not respond. soft indicates that an error is returned. hard indicates that the retry request is continued until the server responds. The default is hard.

intr | nointr

NFS 

Specifies whether keyboard interrupts are delivered to a process that is hung while waiting for a response on a hard-mounted file system. The default is intr (interrupts allowed).

largefiles | nolargefiles

UFS 

Enables you to create files larger than 2 Gbytes. The largefiles option means that a file system mounted with this option might contain files larger than 2 Gbytes, but it is not a requirement. The default is largefiles. If the nolargefiles option is specified, the file system could not be mounted on a system running Solaris 2.6 or compatible versions.

logging | nologging

UFS 

Enables logging for the file system. UFS logging is the process of storing transactions (changes that make up a complete UFS operation) into a log before the transactions are applied to the UFS file system. Logging helps prevent UFS file systems from becoming inconsistent, which means fsck can be bypassed. Bypassing fsck reduces the time to reboot a system if it crashes, or after a system is shutdown uncleanly.

The log is allocated from free blocks on the file system, and is sized approximately 1 Mbyte per 1 Gbyte of file system, up to a maximum of 64 Mbytes. The default is nologging.

noatime

UFS 

Suppresses access time updates on files, except when they coincide with updates to the ctime or mtime. See stat(2). This option reduces disk activity on file systems where access times are unimportant (for example, a Usenet news spool). The default is normal access time (atime) recording.

remount

All 

Changes the mount options associated with an already-mounted file system. This option can generally be used with any option except ro, but what can be changed with this option is dependent on the file system type.

retry=n

NFS 

Retries the mount operation when it fails. n is the number of times to retry.

ro | rw

CacheFS, NFS, PCFS, UFS, S5FS 

Specifies read/write or read-only. If you do not specify this option, the default is read/write. The default option for HSFS is ro.

suid | nosuid

CacheFS, HSFS, NFS, S5FS, UFS 

Allows or disallows setuid execution. The default is to allow setuid execution.