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Annotation of coherent/a/usr/man/COHERENT/boot, revision 1.1

1.1     ! root        1: 
        !             2: 
        !             3: boot                          Driver                         boot
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        !             8: Boot block for hard-disk partition/nine-sector diskette
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        !            11: To be bootable, a COHERENT  file system must contain a boot block
        !            12: that lives  in the first block of the  file system.  In addition,
        !            13: all hard  disks must  contain the master  boot block mboot  or an
        !            14: equivalent.
        !            15: 
        !            16: boot is a boot block for  a hard-disk partition or a floppy disk.
        !            17: It must be installed as the first sector of the partition or dis-
        !            18: kette; for  example, the following  commands format and  create a
        !            19: file system on a high-density, 5.25-inch diskette:
        !            20: 
        !            21: 
        !            22:         /etc/fdformat -v -i 4 /dev/fha0
        !            23:         /etc/mkfs /dev/fha0 2400
        !            24:         /bin/cp /conf/boot.fha /dev/fha0
        !            25: 
        !            26: 
        !            27: boot searches  its root directory  `/' for file  _a_u_t_o_b_o_o_t.  If it
        !            28: finds this  kernel, bboooott loads and runs  it.  Otherwise, it gives
        !            29: the  prompt ?,  to  which the  user  must type  the  name of  the
        !            30: operating-system  kernel to  load (typically,  ``coherent'').  If
        !            31: bboooott cannot find the requested kernel or if an error occurs, boot
        !            32: does not print an error message, but re-prompts with `?'.
        !            33: 
        !            34: ***** Creating a Bootable Floppy Disk *****
        !            35: 
        !            36: In  some  cases, it  is  necessary to  create  a mini-version  of
        !            37: COHERENT that can be booted from a floppy disk.  For example, you
        !            38: may wish to  test a device driver or a  tricky program written in
        !            39: assembly language;  by using  a floppy-disk version  of COHERENT,
        !            40: you can test your program  yet protect your hard disk's file sys-
        !            41: tems from damage should something go wrong.
        !            42: 
        !            43: The following  describes how to  create a floppy-disk  version of
        !            44: COHERENT.  If  your drive A is  a 5.25-inch, high-density device,
        !            45: type:
        !            46: 
        !            47: 
        !            48:         export DEV=/dev/fha0
        !            49:         export BS=30b
        !            50: 
        !            51: 
        !            52: If,  however, your  drive A is  a 3.5-inch,  high-density device,
        !            53: type:
        !            54: 
        !            55: 
        !            56:         export DEV=/dev/fva0
        !            57:         export BS=36b
        !            58: 
        !            59: 
        !            60: The rest of the commands will be the same for either device.
        !            61: 
        !            62: 
        !            63: 
        !            64: COHERENT Lexicon                                           Page 1
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        !            68: 
        !            69: boot                          Driver                         boot
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        !            71: 
        !            72: 
        !            73: The next step is to copy disk 1 of your COHERENT release onto the
        !            74: hard disk.  Insert disk 1 into drive A and type:
        !            75: 
        !            76: 
        !            77:         dd if=$DEV of=_f_i_l_e__n_a_m_e count=80 bs=$BS
        !            78: 
        !            79: 
        !            80: where file_name is the file into which you are copying the disk.
        !            81: 
        !            82: Now, remove  the COHERENT release disk and  insert a blank floppy
        !            83: disk.  The next step is to format it; type the following command:
        !            84: 
        !            85: 
        !            86:         /etc/fdformat $DEV
        !            87: 
        !            88: 
        !            89: Now, copy  the file that  contains your copy  of COHERENT release
        !            90: disk 1 onto the newly formatted floppy disk:
        !            91: 
        !            92: 
        !            93:         dd if=_f_i_l_e__n_a_m_e of=$DEV count=80 bs=$BS
        !            94: 
        !            95: 
        !            96: where file_name is the file that holds COHERENT.
        !            97: 
        !            98: Now, mount the new floppy disk:
        !            99: 
        !           100: 
        !           101:         /etc/mount $DEV /f0
        !           102: 
        !           103: 
        !           104: From this point on, you  must have superuser status.  If you have
        !           105: not yet done so, type
        !           106: 
        !           107: 
        !           108:         su root
        !           109: 
        !           110: 
        !           111: and type the password if prompted.
        !           112: 
        !           113: The final steps further prepare the new floppy disk:
        !           114: 
        !           115: 
        !           116:         cd /f0
        !           117:         mv begin autoboot
        !           118:         rm Coh_300.1
        !           119:         cd etc
        !           120:         rm brc*
        !           121:         rm build
        !           122: 
        !           123: 
        !           124: The bootable  floppy is now  done.  Type <ctrl-D>  to return from
        !           125: superuser status, and then type the command
        !           126: 
        !           127: 
        !           128: 
        !           129: 
        !           130: COHERENT Lexicon                                           Page 2
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        !           134: 
        !           135: boot                          Driver                         boot
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        !           138: 
        !           139: 
        !           140:         /etc/umount $DEV
        !           141: 
        !           142: 
        !           143: to unmount the floppy disk.  Put it away in a safe place.
        !           144: 
        !           145: Your  bootable  floppy   disk  contains  about  700  blocks  (350
        !           146: kilobytes) of  an information.  We  suggest that you put  on it a
        !           147: handful  of  the   most  commonly  used  programs,  such  as  the
        !           148: MicroEMACS screen editor.
        !           149: 
        !           150: ***** Files *****
        !           151: 
        !           152: /ccoonnff/bboooott* -- Various diskette boot blocks
        !           153: 
        !           154: ***** See Also *****
        !           155: 
        !           156: device drivers, fdisk, mboot, mkfs
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        !           196: COHERENT Lexicon                                           Page 3
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