Whitespace-only change: apply normal line breaking style.
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5c8dc2dd0d
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Notes:
svn2git
2020-12-20 02:59:44 +00:00
svn path=/head/; revision=65734
@ -51,8 +51,8 @@ Note that what are referred to here as
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.Dq slices
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are typically called
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.Dq partitions
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in non-BSD documentation relating to the PC. Typically, only
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non-removable disks are sliced.
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in non-BSD documentation relating to the PC.
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Typically, only non-removable disks are sliced.
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.Pp
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The
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.Nm
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@ -63,23 +63,25 @@ boot manager on the specified
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and allows various operational parameters to be configured.
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.Pp
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On PCs, a boot manager typically occupies sector 0 of a disk, which is
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known as the Master Boot Record (MBR). The MBR contains both code (to
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which control is passed by the PC BIOS) and data (an embedded table of
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defined slices).
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known as the Master Boot Record (MBR).
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The MBR contains both code (to which control is passed by the PC BIOS)
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and data (an embedded table of defined slices).
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.Pp
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The options are:
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.Bl -tag -width indent
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.It Fl B
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Install the
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.Sq boot0
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boot manager. This option causes MBR code to be replaced, but without
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boot manager.
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This option causes MBR code to be replaced, but without
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affecting the embedded slice table.
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.It Fl v
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Verbose: display information about the slices defined, etc.
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.It Fl b Ar boot0
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Specify which
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.Sq boot0
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image to use. The default is /boot/boot0.
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image to use.
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The default is /boot/boot0.
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.It Fl d Ar drive
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Specify the drive number used by the PC BIOS in referencing the drive
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which contains the specified
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@ -105,18 +107,21 @@ prepended as necessary):
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.It packet
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Permit use of the disk packet (BIOS Int 0x13 extensions) interface
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in addition to the conventional (CHS) interface, as necessary, when
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accessing disk-related BIOS services. This is the default; a
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accessing disk-related BIOS services.
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This is the default; a
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.Sq nopacket
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option prevents use of the Int 0x13 extensions.
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.It setdrv
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Forces the drive containing the disk to be referenced using drive
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number definable by means of the -d option. The default is
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number definable by means of the -d option.
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The default is
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.Sq nosetdrv .
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.It update
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Allow the MBR to be updated by the boot manager. (The MBR may be
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updated to flag slices as
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Allow the MBR to be updated by the boot manager.
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(The MBR may be updated to flag slices as
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.Sq active ,
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and to save slice selection information.) This is the default; a
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and to save slice selection information.)
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This is the default; a
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.Sq noupdate
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option causes the MBR to be treated as read-only.
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.El
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@ -124,8 +129,8 @@ option causes the MBR to be treated as read-only.
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Set the default boot selection to
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.Ar slice .
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Values between 1 and 4 refer to slices; a value of 5 refers to the
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option of booting from a second disk. This would normally be used in
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conjunction with the
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option of booting from a second disk.
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This would normally be used in conjunction with the
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.Sq noupdate
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option.
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.It Fl t Ar ticks
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@ -150,4 +155,5 @@ to fail, depending on the nature of BIOS support.
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Use of the
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.Sq setdrv
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option with an incorrect -d operand may cause the MBR to be written
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to the wrong disk. Be careful!
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to the wrong disk.
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Be careful!
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