Maintaining The Chkdisks Crontab; Activating Chkdisks; Verifying Chkdisks; Changing The Scheduled Run Time - Lucent Technologies CentreVu Release 3 Version 8 Disk-Mirrored Systems User Manual

Maintaining Mirrored Systems

Maintaining the chkDisks crontab

Maintaining the chkDisks crontab
Activating
chkDisks

Verifying chkDisks

Changing the
scheduled run time
Canceling
chkDisks
CentreVu CMS Release 3 Version 8 Disk-Mirrored Systems
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
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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:
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# crontab -l
Check the listing to see that there is an entry for chkDisks.
The /olds/chkDisks line in the cron file is generally in the following format:
15 0 * * * /olds/chkDisks > /dev/null 2>&1
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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:
3 # crontab -e
With the file loaded in the editor, comment out the entry for chkDisks and
write and quit the file.
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