How to check file system I/O block size on Solaris 5.7

The kernel allows file systems to access devices in multiples of 512 bytes (DEV_BSIZE). The size actually used is up to the specific file system code. In the case of UFS, the block size can be 4K or 8K, but only 8K is supported on sun4u machines. One way to check the size used by a specific UFS file system is to run this as root or any user with permission to read the disk:

fstyp -v /dev/dsk/whatever | grep -w bsize

Richard

RichardMathews at 2007-7-5 18:06:35 >