linux/linux-5.18.11/Documentation/admin-guide/ufs.rst

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Using UFS
=========
mount -t ufs -o ufstype=type_of_ufs device dir
UFS Options
===========
ufstype=type_of_ufs
UFS is a file system widely used in different operating systems.
The problem are differences among implementations. Features of
some implementations are undocumented, so its hard to recognize
type of ufs automatically. That's why user must specify type of
ufs manually by mount option ufstype. Possible values are:
old
old format of ufs
default value, supported as read-only
44bsd
used in FreeBSD, NetBSD, OpenBSD
supported as read-write
ufs2
used in FreeBSD 5.x
supported as read-write
5xbsd
synonym for ufs2
sun
used in SunOS (Solaris)
supported as read-write
sunx86
used in SunOS for Intel (Solarisx86)
supported as read-write
hp
used in HP-UX
supported as read-only
nextstep
used in NextStep
supported as read-only
nextstep-cd
used for NextStep CDROMs (block_size == 2048)
supported as read-only
openstep
used in OpenStep
supported as read-only
Possible Problems
-----------------
See next section, if you have any.
Bug Reports
-----------
Any ufs bug report you can send to daniel.pirkl@email.cz or
to dushistov@mail.ru (do not send partition tables bug reports).