Initializing a File System

To create a new file system or to replace an old or damaged file system, use the sammkfs(1M) command to initialize the file system. The sammkfs command constructs and initializes file systems.

Note - Beginning with Sun QFS 5.0, the sammkfs command creates a version 2A file system that has new features but is not compatible with previous releases. Use the sammkfs -P format to create a version 2 file system that is backwards compatible with previous releases. Use the sammkfs -a allocation-unit option to specify the DAU setting.

The following samfsinfo command output shows that the samfs1 file system is using a version 2 superblock.

# samfsinfo samfs1
name:     samfs1       version:        2
time:     Wed Feb 21 13:32:18 1996
count:    1
capacity:      001240a0          DAU:         16
space:         000d8ea0
ord  eq   capacity      space   device
  0  10   001240a0   000d8ea0   /dev/dsk/c1t1d0s0

The following example shows the sammkfs command in its simplest form, with the file system name as its only argument. This command builds a version 2A superblock for a stand-alone Sun QFS or SAM-QFS file system.

# sammkfs samqfs1

For more information about the sammkfs command, its options, and the implications of the version 2 and 2A superblocks, see the sammkfs(1M) man page. For information about using the sammkfs command to initialize a shared Sun QFS file system, see Chapter 5, Configuring a Shared File System.

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