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Sunday, 8 December 2013

LUN Detection in Linux

Before Scanning the LUN, take the output of fdisk-l

Execute the command:

echo "- - -" > /sys/class/scsi_host/host#/scan

host : Refers to the HBA Device Name.

Run the # fdisk -l and look for the newly assigned LUN.

NTP Sync Manually

1. Use the "xntpd -x" command to slowly bring the clocks
into sync. ( +/- 2 seconds per minute )

NOTE: Starting time cannot be more than 1000 seconds
out of sync with the server or the xntpd daemon
will terminate and the error messages referenced
above will be logged to syslog. Also note that
the system's clock is never set BACKWARDS.
Instead, the clock is slowed down and the server
is allowed to catch up.

2. Use the "ntpdate -B" command to adjust the clocks into
sync. ( +/- 20 seconds per minute )

3. Set the time/date manually.

4. Reboot.