FileSystems traces its way through the RootBlock system structure and
formats and displays information about each of the mounted filesystems,
including device driver name, unit number, BufMemType, and the physical
geometry of the device (such as 80 tracks by 2 sides by 11 sectors per track).

 PERMSSN    UID  GID    PACKED    SIZE  RATIO     CRC       STAMP          NAME
---------- ----------- ------- ------- ------ ---------- ------------ -------------
[generic]                  296     974  30.4% -lh5- 3081 Mar  2  1990 FileSystems.info
[generic]                   23      23 100.0% -lh0- ff91 Mar  2  1990 FileSystems/.info
[generic]                 4184    6616  63.2% -lh5- b235 Mar  2  1990 FileSystems/FileSystems
[generic]                 1758    4160  42.3% -lh5- 5e96 Mar  2  1990 FileSystems/FileSystems.c
[generic]                  433     841  51.5% -lh5- 22f5 Mar  2  1990 FileSystems/Makefile
[generic]                 1040    2154  48.3% -lh5- 1944 Mar  2  1990 FileSystems/POSTER
[generic]                  834    1592  52.4% -lh5- 50d6 Mar  2  1990 FileSystems/ReadMe
[generic]                  452    2570  17.6% -lh5- 3bee Mar  2  1990 FileSystems/ReadMe.info
---------- ----------- ------- ------- ------ ---------- ------------ -------------
 Total         8 files    9020   18930  47.6%            Mar  2  1990