bdf

http://topmanopensource.iteye.com/blog/965847

       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.