Hp-UX中bdf和df的区别

           HP-UX measures space in 1024-byte blocks in bdf, but 512-byte blocks in df. The df command is a standard UNIX report of free disc space. bdf is a nicer Berkeley form of df supplied with HP-UX; it shows free and used disc space on each file system (it does not include Swap Space and other overhead disc space). Here is some sample bdf output:

 

Filesystem kbytes used avail capacity mounted on

/dev/vg00/lvol1	104097	66657	27030	71%	/
/dev/vg00/lvol5	79449	21	71483	0%	/tmp
/dev/vg00/lvol4	99385	64732	24714	72%	/users
/dev/vg00/lvol3	496865	418420	28758	94%	/usr
dumbo.robelle.com:/sys/apps	627120	455712	171408	73%	/pcserver/sys/apps
/dev/dsk/c3d0s2	546660	546660	0	100%	/cdrom1
/dev/dsk/c4d0s2	321402	321402	0	100%	/cdrom2

           The /vg00 file systems are logical subdivisions of the hard drive allocated to different subdirectories under the root directory. The idea is similar to account and group limits in MPE. The dumbo file system is a LAN PC server, mounted as a Network File System on UNIX. And the last two are CD-ROM drives with the HP-UX and MPE manuals mounted. The capacity column is sort of equivalent to MPE/iX's max Perm percent, in that 100 percent doesn't mean that the disc is full. HP-UX generally makes the disc look 100 percent full when it is actually about 90 percent full. The remaining 10 percent is given only to superuser.

              bdf reports kilobytes free per HP-UX file system. See /etc/checklist/ for all file systems known to your HP-UX system and /etc/mnttab/ for all file systems which are mounted. Disc space is managed as "device-files"; see /dev/dsk/* for all disc devices. When you run out of disc space, the error you see is "No space left on device." To find out who is using the disc space on HP-UX, try du -s /users/*. This shows how many 512-byte blocks are used by each subdirectory under /users.