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Appendix B Using the Command Line 11 9

Initializing a Volume (cvmkfs)

Use the cvmkfs command to initialize an Xsan volume based on the information in the

volume’s conguration (in /Library/Filesystems/Xsan/cong/volume.cfg).

WARNING: Initializing a volume destroys all existing data on the volume.

$ sudo cvmkfs [-G] [-F] [volume]

Parameter Description

-G

Don’t display “Press return to continue” prompts.

-F

Don’t display warning and verication prompts.

Use with caution.

volume

The name of the volume to initialize. This name

matches the name of a conguration (.cfg) le in

/Library/Filesystems/Xsan/cong/.

Applying Volume Conguration Changes (cvupdatefs)

Use the cvupdatefs command to apply conguration le changes to a volume after

you modify the volume’s conguration les.

$ sudo cvupdatefs [-f] volume [configdir]

Parameter Description

-f

Update without prompting for conrmation or

advising of errors in the conguration le.

volume

The volume to update. If you don’t specify a

volume, available volumes are listed for you to

choose from.

configdir

Location of the volume’s conguration (.cfg)

le if it’s not in the default location (/Library/

Filesystems/Xsan/cong/).

Defragmenting a File, Folder, or Volume (snfsdefrag)

Use the snfsdefrag command to defragment a le by reallocating its data in a single

extent. This can improve read and write performance for a le by increasing disk

eciency and reducing le metadata management overhead.

To defragment a le or folder:

$ snfsdefrag [-D] [-d] [-q] [-s] [-v] [-K affinity] [-k affinity] [-m

count] [-r] target

To report le extents without defragmenting:

$ snfsdefrag -e [-K affinity] [-r] target [target] [...]

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Apple Xsan Bedienungsanleitung Seite 119