debug
Enable debugging code for this filesystem.
bsdgroups
Analog BSD behavior when creating new files: they will use to create their catalog. System V is the standard behavior by default, newly created files using fsgid current process, unless the directory has the setgid bit, in this case, it gets gid from the parent directory, if the directory is also acquiring setgid bit set itself.
user_xattr
Enable user-specified extended attributes.
acl
Enable Posix Access Control Lists.
uid16
Disable 32-bit uid and gid. This is the only store for interoperability and expect 16-bit value and the old kernel.
journal_data
Enable logging when the file system is installed, all data (not just the meta -) data) in the main file is written to the log before submitting -tem.
journal_data_ordered
When you enable logging mount the file system, all data will be enforced in its metadata will be submitted to the journal.
journal_data_writeback
When mount the file system to enable logging, after the metadata submitted to the log, the master can write data to the file system. This may increase throughput, however, it may allow old data files appear after the collapse and recovery log.
nobarrier
File system will be mounted, and disable the barrier operation log. (This option is currently only supports the ext4 file system driver + kernel 2.6.35.)
block_validity
File system will be mounted, and enable block_validity option, which will lead to the implementation of additional checks after read or write to the file system. This may be partially covered by the inode table or group descriptor block to prevent damage to the file system metadata block cause damage. This is to increase the cost of memory and CPU overhead, so it is only for debugging purposes. (This option is currently only being driven 2.6.35+ kernel supports the ext4 file system.)
discard
File system will use discarded mount option to mount. This will cause the file system driver attempts to use certain storage devices (e.g., enterprise storage array and certain SSD available thin supply driver) The trim / discard notification storage device characteristics, belonging to the deleted file blocks may be used for other purposes . (This option is currently only being driven 2.6.35+ kernel supports the ext4 file system.)
nodelalloc
File system will use nodelalloc mount option to mount. This will cancel the delayed allocation feature. (This option is currently only being driven 2.6.35+ kernel supports the ext4 file system.)