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Annotation of researchv10dc/man/man8/mkfs.8, revision 1.1.1.1

1.1       root        1: .TH MKFS 8
                      2: .CT 1 sa_nonmortals
                      3: .SH NAME
                      4: mkfs, mkbitfs, mklost+found \- construct a disk file system
                      5: .SH SYNOPSIS
                      6: .B /etc/mkfs
                      7: .I special size
                      8: [
                      9: .I spacing cylsize
                     10: ]
                     11: .PP
                     12: .B /etc/mkbitfs
                     13: .I special size
                     14: [
                     15: .I spacing cylsize
                     16: ]
                     17: .PP
                     18: .B /etc/mklost+found
                     19: .SH DESCRIPTION
                     20: .I Mkfs
                     21: .RI ( mkbitfs )
                     22: constructs a regular (bitmapped) file system on the block device
                     23: .IR special .
                     24: .I Size
                     25: is the number of 1KB (4KB)
                     26: blocks on the special file.
                     27: Values of
                     28: .I size
                     29: for various special files, e.g.
                     30: .IR ra (4),
                     31: are given in Section 4.
                     32: The new file system has a single empty directory and a
                     33: number of inodes that depends on the size.
                     34: .PP
                     35: .I Spacing
                     36: and
                     37: .I cylsize
                     38: are used for block allocation.
                     39: .I Spacing
                     40: is the preferred distance between successive blocks of a file;
                     41: .I cylsize
                     42: is the number of blocks the system can use
                     43: without causing a disk seek.
                     44: Suboptimal default values
                     45: are built into the programs;
                     46: some reasonable values are suggested below.
                     47: .PP
                     48: .I Mklost+found
                     49: creates a directory called
                     50: .B lost+found
                     51: in the working directory
                     52: with several empty slots.
                     53: This directory is used as a repository
                     54: for disconnected files
                     55: recovered by
                     56: .IR fsck (8)
                     57: and
                     58: .IR chuck (8).
                     59: .SH EXAMPLES
                     60: .EX
                     61: /etc/mkbitfs /dev/ra03 31231
                     62: /etc/mount /dev/ra03 /mnt
                     63: cd /mnt
                     64: /etc/mklost+found
                     65: .EE
                     66: .br
                     67: .ns
                     68: .IP
                     69: Notice the change of units between
                     70: .IR ra (4)
                     71: and here: 31231 = 249848\(**512/4096.
                     72: .SH "SEE ALSO"
                     73: .IR filsys (5),
                     74: .IR fsck (8)
                     75: .SH BUGS
                     76: .I Fsck
                     77: should make
                     78: .I lost+found
                     79: automatically
                     80: when needed.
                     81: .SH MACHINE DEPENDENCIES
                     82: Here are empirically good values for 
                     83: .I spacing
                     84: and
                     85: .I cylsize
                     86: for VAX hardware.
                     87: Minor changes, such as a new version of a controller,
                     88: can invalidate them.
                     89: To be certain,
                     90: run your own experiments.
                     91: Cylinder size doesn't seem to matter much
                     92: on RA81 disks.
                     93: On RA90s, it doesn't matter as long as it is large.
                     94: .PP
                     95: .2C
                     96: Bitmapped (4K) file systems
                     97: .nf
                     98: .if n .ta 6 +6 +6
                     99: space  cyl     disk, controller, CPU
                    100: 2      500     RA90, KDB50, VAX 8550
                    101: 4      500     RA90, UDA50, VAX 8550
                    102: 2      40      RA81, KDB50, VAX 8550
                    103: 3      40      RA81, old KDB50, VAX 8550
                    104: 3      40      RA81, UDA50, VAX 8550
                    105: 3      105     Wren VI, Viking UDD, VAX 8550
                    106: 4      40      RA81, UDA50, VAX-11/750
                    107: 3      40      RA60, UDA50, VAX-11/750
                    108: 3      40      RA81, KDA50, MicroVAX II
                    109: 1      40      RD54, RQDX3, MicroVAX II
                    110: 3      40      RA81, KDA50, MicroVAX III
                    111: Old-style (1K) file systems
                    112: space  cyl     disk, controller, CPU
                    113: 5      357     RA81, KDB50, VAX 8550
                    114: 7      357     RA81, UDA50, VAX-11/780
                    115: 7      357     RA81, KDA50, MicroVAX II
                    116: 7      128     RD54, RQDX3, MicroVAX II
                    117: 6      357     RA81, KDA50, MicroVAX III
                    118: .sp5
                    119: .1C

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