Lucent Technologies 585-210-940 manual Maintaining the chkDisks crontab, Canceling chkDisks

Maintaining Mirrored Systems	CentreVu CMS Release 3 Version 8 Disk-Mirrored Systems
Maintaining the chkDisks crontab	40

Maintaining the chkDisks crontab

Activating chkDisks

Verifying chkDisks

The chkDisks crontab runs each night and checks to see whether any potential or actual drive problems have been logged. The results of the search are logged to /olds/elog and mailed to the root user. This section shows how to start and stop chkDisks, and how to verify that it will run.

Activate chkDisks by doing the following steps:

1.Enter the command: # crontab -e

The system starts the editor and loads the cron file.

2.Find the line for /olds/chkDisks. If it is commented out, uncomment it by deleting the pound sign at the beginning of the line. If there is no line for /olds/chkDisks, add the following line to the end of the file:

15 0 * * * /olds/chkDisks > /dev/null 2>&1

To verify that cron is running, enter the following command:

#crontab -l

Check the listing to see that there is an entry for chkDisks.

Changing the scheduled run time

Canceling chkDisks

The /olds/chkDisks line in the cron file is generally in the following format:

15 0 * * * /olds/chkDisks > /dev/null 2>&1

This line tells the system to run chkDisks every day at 15 minutes past hour zero, or 12:15 AM. You can change that schedule by changing the first five fields as necessary. The fields, in order of appearance, are: minute, hour, day of the month, month of the year, and day of the week. An asterisk means “all legal values.” For more information, see the manual (man) page for the crontab command.

To stop cron from running, enter the following command:

#crontab -e

With the file loaded in the editor, comment out the entry for chkDisks and write and quit the file.