3.4.0 Matrix Server Command Reference

Chapter 1: PolyServe Matrix Server Commands 25

--no-modify, -n

Checks the filesystem in read-only mode, preventing psfscheck from

replaying the journal and/or fixing any corruption. If errors are found, it is

strongly recommended that you run psfscheck again, without the

--no-modify option, before running with the --rebuild-tree option. (The

--no-modify option cannot be specified with the --rebuild-tree or

--rebuild-sb options).

--scan-marked-in-bitmap filename, -b filename

Builds a tree of blocks marked in the bitmapfile. This option requires the

--rebuild-tree option.

--create-bitmap-file filename, -c filename

Saves bitmap of found leaves.

-y

Causes psfscheck to answer “yes” to all questions.

Enable or disable FZBMs

The psfscheck utility also provides options to enable or disable Full Zone Bit

Maps (FZBMs). This on-disk filesystem format reduces the amount of data

that the filesystem needs to read when allocating a block. It is particularly

useful for speeding up allocation times on large, relatively full filesystems.

For details about FZBM, see the PolyServe Knowledge Base article “Using the

FZBM On-Disk Filesystem Format.”

The options are:

--enable-fzbm

Enable the FZBM feature on the specified filesystem.

--disable-fzbm

Disable the FZBM feature on the specified filesystem.

The upgrade-fs and --downgrade-fs options are obsolete.

Enable sparse files

PolyServe Matrix Server 3.4 provides support for sparse files. To enable

sparse files on a PSFS filesystem that was created under an earlier version of

PolyServe Matrix Server, use the following option: