Question about ustat(2) and free disk space / df, 4BSD

[chris at umcp-cs.UUCP]

Under 4.1 "df" works by reading the superblock off the disk.  4.1
maintains a "tfree" value in the superblock which holds the amount
of free space.  df also has a "-l" option to go count up the free
list (it's printed out under a column marked "hardway" -- pretty
appropriate).

The -l option is occasionally useful if you suspect your superblock
is munged.

For the adventurous, you can experiment with different disk-inode-
table sizes based on the output of "df -i".
-- 
In-Real-Life: Chris Torek, Univ of MD Comp Sci
UUCP:	{seismo,allegra,brl-bmd}!umcp-cs!chris
CSNet:	chris at umcp-cs		ARPA:	chris.umcp-cs at CSNet-Relay