fsba(1M) — ADMINISTRATOR COMMANDS
NAME
fsba − file system block analyzer
SYNOPSIS
/usr/sbin/fsba [ −b target_block_size ] file-system1 [ file-system2 . . . ]
DESCRIPTION
The fsba command determines the disk space required to store the data from an existing file system in a new file system with the specified logical block size. Each file-system listed on the command line refers to an existing file system and should be specified by device name (for example, /dev/rdsk/∗, where the value of ∗ is machine dependent).
The target_block_size specifies the logical block size in bytes of the new file system. Valid target block sizes are 512, 1024, and 2048. Default target block size is 1024. A block size of 2048 is supported only if the 2K file system package is installed.
The fsba command prints information about how many 512-byte disk sectors are allocated to store the data in the old (existing) file system and how many would be required to store the same data in a new file system with the specified logical block size. It also prints the number of allocated and free i-nodes for the existing file system.
If the number of free sectors listed for the new file system is negative, the data will not fit in the new file system unless the new file system is larger than the existing file system. The new file system must be made at least as large as the number of sectors listed by fsba as allocated for the new file system. The maximum size of the new file system is limited by the size of the disk slice used for the new file system.
Note that it is possible to specify a target_block_size that is smaller than the logical block size of the existing file system. In this case the new file system would require fewer sectors to store the data.