mkfs.ocfs2 - Creates an OCFS2 file system.

mkfs.ocfs2 [ -b block-size ] [ -C cluster-size ] [ -L volume-label ] [ -N number-of-nodes ] [ -J journal-options ] [ -F ] [ -q ] [ -v ] [ -V ] device [ blocks-count ]

mkfs.ocfs2 is used to create an OCFS2 file system on a device, usually a partition on a shared disk. In order to prevent data loss, mkfs.ocfs2 will not format an existing OCFS2 volume if that volume is mounted on any node in the cluster. This tool requires the O2CB cluster service to be up.

-b block-size

Valid block size values are 512, 1K, 2K and 4K bytes per block. If omitted, a value will be hueristically determined by the file system size. A block size of 512 bytes is never recommended. Choose 1K, 2K or 4K.

-C cluster-size

Valid cluster size values are 4K, 8K, 16K, 32K, 64K, 128K, 256K, 512K and 1M. If omitted, a value will be hueristically determined by the file system size. For volumes expected to store large files, like database files, a cluster-size of 128K or more is recommended. For others, 16K-64K.

blocks-count

Usually mkfs.ocfs2 automatically determines the size of the given device and creates a file system that uses all of the available space on the device. This optional argument specifies that the file system should only consume the given number of file system blocks (see -b) on the device.

-L volume-label

Set the volume label for the file system. This is useful for mounting-by-label. Limit the label length to under 64 bytes.

-N number-of-node-slots

Valid number ranges from 1 to 255. This number specifies the maximum number of nodes that can concurrently mount the partition. If omitted, the number defaults to 4. This number can be later increased using tunefs.ocfs2.

-J journal-options

Create the journal using options specified on the command-line. Journal options are comma separated, and may take an argument using the equals ('=') sign. The following journal options are supported:

size=journal-size

Create a journal of size journal-size. Minimum size is 4M. If omitted, a value is heuristically determined by the file system size.

-F

For existing OCFS2 volumes, mkfs.ocfs2 ensures the volume is not mounted on any node in the cluster before formatting. For that to work, mkfs.ocfs2 expects the O2CB cluster service to be running. Specify this option to disable this check.

-q

Quiet mode.

-v

Verbose mode.

-V

Print version and exit.

debugfs.ocfs2(8) fsck.ocfs2(8) tunefs.ocfs2(8) mounted.ocfs2(8) ocfs2console(8) ocfs2cdsl(8)

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