Mouse hooked up on KVM switch

I have a EUSSO Technologies SOHO KVM Switch which connected to a (X)ubuntu and a FreeBSD boxes. After switching between them, the mouse was hooked up at the X Window of (X)ubuntu. I tried many methods that searched from the net but in vain.

Fortunately, I discovered that “Scroll Lock” + “Scroll Lock” + “m” can reset the mouse after switching between the 2 boxes.

My problem is solved, happy :-)

Tune your software RAID

Upon your system is installed with software RAID – mdadm, you system runs faster than before (suppose you are using RAID 0 or 5). How to tune your RAID system more faster?

Your minimum speed of the RAID system is 1000 currently :

cat /proc/sys/dev/raid/speed_limit_min

Now, let’s tune it :

sudo -s -H

echo 50000 > /proc/sys/dev/raid/speed_limit_min

Now, your minimum speed of your RAID system is set to 50Mb/sec.

Feel the speed!!!

RAID on Ubuntu

My RAID 1 and RAID 5 combination system is running for a week in very smooth and good condition.

GRUB cannot install on hard drives that setting up with RAID 0 or 5. That means if all your hard drives are setting up with RAID 0 or 5 and Ubuntu is installed on it, GRUB cannot be installed on the MBR.

You should at least make the /boot to be in RAID 1 and the rest can be set to RAID 0 or 5. If you combined RAID 1 and 5 on your system, you may waste some spaces due to RAID 1.