install correct aliases file

[unix-history] / usr / src / usr.sbin / bad144 / bad144.8

diff --git a/usr/src/usr.sbin/bad144/bad144.8 b/usr/src/usr.sbin/bad144/bad144.8
index dacf07e..def660e 100644 (file)
--- a/usr/src/usr.sbin/bad144/bad144.8
+++ b/usr/src/usr.sbin/bad144/bad144.8
@@ -1,8 +1,8 @@
-.\" Copyright (c) 1980 Regents of the University of California.
+.\" Copyright (c) 1980, 1988 Regents of the University of California.

 .\" All rights reserved.  The Berkeley software License Agreement
 .\" specifies the terms and conditions for redistribution.
 .\"
 .\" All rights reserved.  The Berkeley software License Agreement
 .\" specifies the terms and conditions for redistribution.
 .\"

-.\"    @(#)bad144.8    6.1 (Berkeley) %G%
+.\"    @(#)bad144.8    6.5 (Berkeley) %G%

 .\"
 .TH BAD144 8 ""
 .UC 4
 .\"
 .TH BAD144 8 ""
 .UC 4


@@ -12,11 +12,29 @@ bad144 \- read/write dec standard 144 bad sector information
 .B /etc/bad144
 [
 .B \-f
 .B /etc/bad144
 [
 .B \-f

+] [
+.B \-c
+] [
+.B \-v

 ]
 ]

-disktype disk
+disk

 [ sno [
 bad ...
 ] ]
 [ sno [
 bad ...
 ] ]

+.br
+.B /etc/bad144
+.B \-a
+[
+.B \-f
+] [
+.B \-c
+] [
+.B \-v
+]
+disk
+[
+bad ...
+]

 .SH DESCRIPTION
 .I Bad144
 can be used to inspect the information stored on a disk that is used by
 .SH DESCRIPTION
 .I Bad144
 can be used to inspect the information stored on a disk that is used by


@@ -32,8 +50,8 @@ structure.
 Replacement sectors are allocated starting with the first sector before
 the bad sector information and working backwards towards the beginning
 of the disk.  A maximum of 126 bad sectors are supported.  The position
 Replacement sectors are allocated starting with the first sector before
 the bad sector information and working backwards towards the beginning
 of the disk.  A maximum of 126 bad sectors are supported.  The position

-of the bad sector in the bad sector table determines which replacement
-sector it corresponds to.
+of the bad sector in the bad sector table determines the replacement
+sector to which it corresponds.

 The bad sectors must be listed in ascending order.
 .PP
 The bad sector information and replacement sectors are conventionally
 The bad sectors must be listed in ascending order.
 .PP
 The bad sector information and replacement sectors are conventionally


@@ -41,6 +59,8 @@ only accessible through the ``c'' file system partition of the disk.  If
 that partition is used for a file system, the user is responsible for
 making sure that it does not overlap the bad sector information or any
 replacement sectors.
 that partition is used for a file system, the user is responsible for
 making sure that it does not overlap the bad sector information or any
 replacement sectors.

+Thus, one track plus 126 sectors must be reserved to allow use
+of all of the possible bad sector replacements.

 .PP
 The bad sector structure is as follows:
 .PP
 .PP
 The bad sector structure is as follows:
 .PP


@@ -63,31 +83,51 @@ array are filled with all bits set, a putatively
 illegal value.
 .PP
 .I Bad144
 illegal value.
 .PP
 .I Bad144

-is invoked by giving a device type (e.g. rk07, rm03, rm05, etc.), and a device
-name (e.g. hk0, hp1, etc.).  It reads the first sector of the last track
+is invoked by giving a device name (e.g. hk0, hp1, etc.).
+With no optional arguments
+it reads the first sector of the last track

 of the corresponding disk and prints out the bad sector information.
 of the corresponding disk and prints out the bad sector information.

-It may also be invoked giving a serial number for the pack and a list
-of bad sectors, and will then write the supplied information onto the
-same location.  Note, however, that 
+It issues a warning if the bad sectors are out of order.
+.I Bad144
+may also be invoked with a serial number for the pack and a list
+of bad sectors.
+It will write the supplied information into all copies
+of the bad-sector file, replacing any previous information.
+Note, however, that 

 .I bad144
 does not arrange for the specified sectors to be marked bad in this case.
 .I bad144
 does not arrange for the specified sectors to be marked bad in this case.

-This option should only be used to restore known bad sector information which
+This procedure should only be used to restore known bad sector information which

 was destroyed.
 was destroyed.

-It is necessary to reboot before the change will take effect.

 .PP
 .PP

-If the disk is an RP06, Fujitsu Eagle,
-or Ampex Capricorn on a Massbus, the
+With the
+.B \-a
+option,
+the argument list consists of new bad sectors to be added to an existing
+list.
+The new sectors are sorted into the list,
+which must have been in order.
+Replacement sectors are moved to accommodate the additions;
+the new replacement sectors are cleared.
+The entire process is described as it happens in gory detail if
+.B \-v
+(verbose) is given.
+The
+.B \-c
+option forces an attempt to copy the old sector to the replacement,
+and may be useful when replacing an unreliable sector.
+.PP
+If the disk is an RP06, RM03, RM05, Fujitsu Eagle,
+or SMD disk on a Massbus, the

 .B \-f
 .B \-f

-option may be used to mark the bad sectors as ``bad''.
-\fBNOTE:  this can only be done safely when there is no other disk activity\fP,
-preferably while running single-user.
-Otherwise,
-new bad sectors can be added only
-by running a formatter.
-Note that the order in which the sectors are listed determines which sectors
-used for replacements; if new sectors are being inserted into the list on a
-drive that is in use, care should be taken that replacements for
-existing bad sectors have the correct contents.
+option may be used to mark the new bad sectors as ``bad''
+by reformatting them as unusable sectors.
+This option is required unless the sectors have already been marked bad,
+or the system will not be notified that it should use the replacement sector.
+This option may be used while running multiuser; it is no longer necessary
+to perform format operations while running single-user.
+.PP
+It is no longer necessary to reboot to allow the kernel
+to reread the bad-sector table from the drive.

 .SH SEE ALSO
 badsect(8),
 format(8V)
 .SH SEE ALSO
 badsect(8),
 format(8V)


@@ -99,7 +139,7 @@ It should be possible to mark bad sectors on drives of all type.
 On an 11/750,
 the standard bootstrap drivers used to boot the system do
 not understand bad sectors,
 On an 11/750,
 the standard bootstrap drivers used to boot the system do
 not understand bad sectors,

-handle ECC errors, or the special SSE (skip sector) errors of RM80 type disks.
+handle ECC errors, or the special SSE (skip sector) errors of RM80-type disks.

 This means that none of these errors can occur when reading the file
 /vmunix to boot.  Sectors 0-15 of the disk drive
 must also not have any of these errors.
 This means that none of these errors can occur when reading the file
 /vmunix to boot.  Sectors 0-15 of the disk drive
 must also not have any of these errors.