Tip for moving ISO file from one datastore to another (error cuased by file /vmfs/volumes/xxx)

If you want to move files from one datastore to another in esxi make sure the files are not in use
because it will show the error at the end!

for example if you want to move ISO file to another data store make sure it's not mounted to a VM.

How to fix 0x80070570 error while installing windows 7

today i ran into below error while installing windows 7 on a pc.

This error refers to data transfer proccess from installation media to your hdd.
simply data follows from DVD by SATA cable to your motherboard then into RAM and from there to HDD via SATA cable.
So you need to test every single of those.

after hours of troubleshooting  it turns out the problem was the HDD cable.

Tekradius LT service not starting (initial configuration)

Tekradius service will not start till you configure its parameters.

Initial configuration

You must specify a “Client” for Tekradius as below:

1. Open Tekradius LT manager console 
2. Click on “clients” tab
3. Fill the fields 

• NAS : ip address of your client
• Secret : a key which also must be configure at the client side
•  Interim Update Period : if you use Tekradius for accounting too.
• Click on “Add/Update”
• 
  

 You can start Tekradius LT service now

 Right now the client can connect to radius server by using the secret you specified earlier.

You can create user in Tekradius LT as below :

Open Tekradius LT manager console

Click on “Users” tab

Type the username in the box which specified by red line in picture.

Set the attribute to check the password and type the password.

Click on add user profile.

There are lots of other configurations, but for a basic authorization this is enough.

For example if you want Tekradius do your  accounting you can set “time-limit” attribute for the user

and don’t forget to specify the kill command for radius client, so  Tekradius LT send the disconnect

command to the client after the account time limit has been reached.

Fiber optic connector types

  There are 4 fiber optic connector types that we need to keep in mind, so look at this types and remember each type this can help in emergency cases.