How to remove duplicated VMs in VMM console

  1.  Move machine to another hyper-v host via Failover Cluster Manager Console
  2.  Get ID of duplicated VM
  3. Double check working and duplicated machine
  4. Delete duplicated VM configuration

    Note the -Force option! You are risking to delete your data If you do NOT put -Force.

Exchange mailbox statistics in MB



Hyper-V Replicate all VMs


Installing Apache Ambri on Ubuntu 14.04

If you have error like this:


You have to edit :


And change version number:





EMC Recover Point – how to recreate repository volume

We have to recreate repository volume of our RP but I could not find any guidance from EMC site. So I’m documenting my steps here for further usage:

Procedure overview:
On EMC storage:

  1. Create about 6-8 GB LUN.
  2. Present that LUN to storage group of RP nodes.

On RP appliances:
On last cluster member:

  1. Detach RPA from cluster
  2. Format repository volume
  3. Reboot
  4. Attach RPA to cluster

On each subsequent appliance:

  1. Detach RPA from cluster
  2. Select repository volume
  3. Reboot
  4. Attach RPA to cluster

This is a transcript of console sessions:
Continue reading

Car diagnostic with ATmega328P Nano

I was in trouble reading my car’s live data. So I’ve wrote a little utility to read raw car sensors data i.e. i hook up before ECU and send it via serial port to PC using ATmega328P Nano and finally store it to file.

Where to get one:

How to install:
1. Flash AnalogReadSerial.hex  to ATMega.
2. Extract and run carauto. .Net 4 is needed.
3. Choose com port from dropdown menu.

How to use:
Connect analog/digital input to intended sensor via 1KOmh resistor. Please note that all inputs are 5V only!
Shorting digital Input 12 to ground will produce human readable data and will decrease sample rate.

Reading data:
Data are stored in Output.csv file with approximately 1000 samples/second.


Dell DRAC 5 config via ssh

Changing http, https, remote console ports

clear some space


Openvpn on OpenWRT does not start

with error:

try to add to /etc/rc.local:



Charger: OEM vs. “chinese”

OEM has more parts in it, has bigger transformer, weights more, gives more amps and output voltage is stable. Chinese is cheeper.  it is difficult or impossible to tell the difference without opening it (or measure weight).

Current(A) Voltage(V) Weight(g)
OEM 1 5.00 37
Chinese 0.5 4.5 22

wpid-img_20141223_140149.jpg wpid-img_20141223_140123.jpg IMG_20141223_135804 IMG_20141223_135817