BACKUP

Section: Maintenance Commands (8)
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NAME

backup - perform tape backups

SYNOPSIS

backup [ options ] [ date ]

DESCRIPTION

backup reads the file /etc/backup_dates and runs dump(8) to backup the specified filesystems. If no date is given, the current date is used. The backup_dates file consists of lines of 6 fields each. The fields are separated by spaces of tabs. The fields specify the day of the week (Sun-Sat), the week of the month (1-5), the month (Jan-Dec), the dump level to perform (0-9), the filesystem, and an arbitrary message to be delivered to the operator upon completion of the dump. Each of these fields may contain a range or a comma-separated list, or an asterisk meaning all legal values.

Options for backup are:

-m: Run backup in multiuser mode. Usually backup will kill any forground processes and suspend any background processes so that the filesystems will be guaranteed to be quiescent. When run in multiuser mode, no action is taken to insure that there is no filesystem activity.
-bblocksize: Sets the tape blocking factor to blocksize. The default is 32.
-stapelength: Sets the assumed length of the tape to tapelength. This defines how many blocks are written to each tape. The default is 2300 feet.
-ddensity: Sets the tape density to density. This is normally 6250 BPI.
-tdevice: Sets the device to use to device. This is /dev/rmt9 on our systems which corresponds to the TU78 tape drives at 6250 BPI.
-ffile: Causes backup to read the filesystem dump schedule from the file file instead of from /etc/backup_dates.
-wminutes: Sets the warning time to give users when running in single-user mode.

BACKUP_DATES Example

# Backup schedule for Genie - Genentech, Inc.
# Daily level 9's
Tue-Fri *       *       9       /va     "/va dump complete"
# Monday dumps - level 1's
Mon     2-5     *       1       /       "root dump complete"
Mon     2,3,4,5 *       1       /va     "/va dump complete"
# Monthly level 0's
Mon     1       *       0       /       "root dump complete"
Mon     1       *       0       /va     "/va dump complete"

AUTHOR

Scooter Morris - Genentech, Inc.

BUGS

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Time: 06:41:26 GMT, December 12, 2024