emergency_disk(1M) emergency_disk(1M)
NAME
emergency_disk - create emergency recovery diskettes
SYNOPSIS
emergency_disk [-d directory_name] disk_drive
DESCRIPTION
The emergency_disk command creates emergency recovery
diskettes customized for your system. These diskettes should
be created once all your system software is installed. You
should store these diskette in a safe and easily accessible
location in case an emergency such as the following occurs:
Your system will not boot.
The UnixWare system files are corrupted beyond repair.
Your hard disk is damaged and has been reformatted or
replaced.
In such cases you can use the emergency recovery diskettes to
restore your system. To do so, insert the first emergency
recovery diskette and reboot your system. When prompted,
remove the first diskette, insert the second diskette, and
then press ENTER. Then follow the menu options.
Two basic set of options are provided:
1. If the operating system software still exists on your
system, you can attempt to repair the damage by using
the set of UnixWare commands provided on the emergency
diskettes. In particular, you can invoke a UnixWare
operating system that provides the following commands:
cat(1), chroot(1M), cpio(1), date(1), dd(1M),
disksetup(1M), echo(1), edvtoc(1M), fdisk(1M), find(1),
fsck(1M), grep(1), ksh(1), labelit(1M), ln(1), ls(1),
mkdir(1), mkfs(1M), mount(1M), prtvtoc(1M), rm(1),
stty(1), and vi(1). Also, depending on how severely
your system is damaged, you may be able to mount and
unmount file systems from your hard disk. In this case
you can access all the commands on your UnixWare system.
2. If you backed up your system using the emergency_rec(1M)
command and later the operating system software is
damaged beyond repair, you can restore your system's
data to the state it was in at the time you backed it up
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using the emergency_rec command. If you select this
option:
The UNIX partition on the primary hard disk that
contains UnixWare is restored. If the primary hard
disk contains a system partition, then this partition
is also restored. If the /home, /home2, and /usr file
systems were on the secondary hard disk, then these
file systems are restored to the secondary hard disk.
If the -e option was specified when running
emergency_rec, then the entire primary hard disk is
restored. This includes all partitions on the primary
hard disk and not just the UnixWare and system
partitions.
If you created any backups of your system after creating the
emergency recovery tape(s), you can restore the data on these
backups, using the restore(1M) command. This must be done
after your system is repaired.
The emergency diskettes are only intended for the system where
emergency_disk was run. If the UnixWare operating system
still exists on your system and the software detects that you
inserted a diskette for another system, you are prompted for
the Personal Edition/Application Server serial number used to
create the emergency diskette. This ensures that the correct
system is restored.
Do not confuse the emergency recovery facilities with the
backup and restore facilities. Typically, after installing
the system and all add-on software (for example, the Online
Data Manager), the emergency recovery diskettes and emergency
recovery tape(s) should be created using the
emergency_disk(1M) and emergency_rec(1M) commands. This media
should then be stored in a safe location in case your system
is corrupted and a full recovery of the hard disk is needed.
Assuming your system is not damaged, the backup and restore
facilities should be used on a regular basis to perform all
archiving and restoring of user data files. For more
information on the backup and restore facilities, see
backup(1M) and restore(1M).
Flags
-d identifies a working directory for the emergency_disk
command. The working directory must contain at least 22
MB of free space. The default working directory is
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/usr.
Parameters
disk_drive
identifies the disk drive (diskette1 or diskette2)
containing the diskette that should be formatted into an
emergency recovery diskette for your system.
Files
A temporary log file is created in /tmp/drf_PID.log, where PID
is the process ID for the emergency_disk command. If an error
is encountered a message is displayed to standard error and
additional information is provided in this log file.
Exit Codes
The emergency_disk command exits with one of the following
values:
0 Success
1 Failure. See the /tmp/drf_PID.log log file.
Diagnostics
A temporary log file is created in /tmp/drf_PID.log, where PID
is the process ID for the emergency_disk command. If an error
is encountered a message is displayed to standard error and
additional information is provided in this log file.
USAGE
Examples
To create emergency diskettes using disk drive 2 and the root
file system as the working directory, insert a diskette in
disk drive 2 and enter:
emergency_disk -d / diskette2
When prompted, remove the first diskette and insert a second
diskette. Then press ENTER.
Warnings
Attempting to use the emergency diskette to copy UnixWare
between systems is prohibited. The emergency diskette is
customized for the system on which it is created and may have
unpredictable ramifications if used on another system.
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NOTICES
If you change the hard disk configuration on your system (for
example, you add or replace a hard disk), you should create
new emergency recovery diskettes using the procedure outlined
above.
REFERENCES
backup(1M), emergency_rec(1M), restore(1M)
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