You need to convert MBR partition to GPT (GUID Partition Table) which introduces some new features, like:
- Address range expanded from 232 to 264 sectors which enables partition sizes larger than 2TB (assuming 512 sectors)
- More than 4 partitions per disk. MBR was limited to 4, GPT defaults to 128, but can be increased.
- Fully supported by UEFI BIOS system. Actually you need to have UEFI BIOS to be able to boot from GPT disk.
- More at wiki
There is, however a small command line utility designed especially for that purpose, it is called GPTGen.
To convert using this utility you have to know the physical number of your hard drive
- Open up command prompt as Administrator
- Type diskpart and press Enter
- Type list disk and press Enter
- Note the disk number you want to convert
- Navigate to where you have extracted GPTGen
- Run command gptgen.exe -w \\.\physicaldriveX where X is Disk number from Diskpart and press Enter
- Now it’s good idea to reboot, then after reboot run check disk on converted disk just in case.
Now you can extend partition to 264 sectors. Assuming you have a legacy disk/scheme with 512bytes sectors, that gives maximum size is 9.4 ZB (9.4 × 1021 bytes) or 8 ZiB (9,444,732,965,739,290,427,392 bytes, coming from 18,446,744,073,709,551,616 (264) sectors × 512 (29) bytes per sector) but in real world Windows cuts this to 256TB per partition which in my opinion is more than enough.
With GPT disk scheme you must have UEFI compatible BIOS or install special MBR-to-GPT boot loader in order to be able boot Windows from GPT disk, but this is another story…
Check Whether the Exchange Server is an Open SMTP Relay using a Telnet Test
A Telnet test involves establishing a Telnet session from a computer that is not located on the local network to the external (public) IP address of the Exchange server. You need to carry out the test from a machine at home, or from another office. Doing the test from a machine on your own network will produce useless results.
- Start a command prompt.
Either click start, run and type CMD
or Choose Command Prompt from Start, Programs, Accessories, Command Prompt
- Type “telnet” (minus quotes) and press enter.
- At the Telnet prompt, type
(minus quotes) and press enter. This lets you see what is going on.
- Still in the telnet prompt, enter the following command and then press enter
open external-ip 25
where external-ip is your external IP address eg:
open 111.222.333.444 25
- You should get a response back similar to the following:
220 mail.server.domain Microsoft ESMTP MAIL Service, Version: 6.0.2790.0 Ready at
- Type the following command in to the telnet windows:
and press enter (note “testdomain.com” can be anything that isn’t a domain that the Exchange server is responsible for.
- After pressing OK you should get a response back
- Type the following command in to the telnet window:
and press enter (again where address@testdomain is an email address that is not on the Exchange server. Note the lack of space between from and the first part of the address).
- After pressing OK you should get a response back:
250 2.1.0 firstname.lastname@example.org….Sender OK
- Type the following command in to the telnet window:
and then press enter (where email@example.com is not either an address you use internally or the address you entered earlier as the from. Once again note the lack of space between to and the first part of the e-mail address).
- After pressing enter you will get one of two responses.
If you get
550 5.7.1 Unable to relay for firstname.lastname@example.org
then you are relay secure.
However if you get
250 2.1.5 email@example.com
Then you are an open relay.
Installing Dell OMSA on a ESXi server allows you to see more detailed information regarding the Dell hardware. It also allows you to perform operations such as specifying hot spares and rebuilding RAID arrays. After you install OMSA on the ESXi server you can install the OMSA web-based GUI on another Windows PC or Server in order to access OMSA.
The steps below will get OMSA up and running on VMWare ESXi 5.5. Be sure to download the version of the OMSA Offline Installation Bundle that corresponds to your version of ESXi.
Download the OMSA Offline Bundle from the Dell Website.
Open gpedit.msc and browse to the location /Computer Configuration/Administrative Templates/System/Internet Communication Management/Internet Communication Settings and double click “turn off access to all windows update features” and set it to disabled.
Open regedit and back up the key
Remove reg key from regedit
and delete WindowsUpdate as it may contain your administrator settings for windows update which includes a WSUS server address, this entry prevents your windows update from contacting windows update directly.
Windows Server Time Sync Configuration
The following steps can be used to configure DCs the default Windows time service hierarchy in an AD forest. The procedure will also remove any errors in the Event Viewer, if any existed.
Do not use if you are using a third party stratum service and refer to the vendor’s documentation for further instructions
Check and Document the Current Time Configuration on the PDC Emulator
Download BGInfo from HERE
Extract and Open bginfo. On the Right side of the configuration window, you can edit the content to customize the fields to appear on your system wallpaper. Once edited, click file -> Save as -> Type the name as .bgi and select location C:\BGInfo folder BGInfo folder should
Windows Registry Editor Version 5.00
No longer need to login every time I boot up my test server
NRPE is called as ‘Nagios Remote Plugin Executor’. NRPE allows nagios server
to remotely execute nagios commands or plugins on other Linux/Unix machines. NRPE is also available windows servers.
Following document shows you how to install NRPE, I am installing it on CentOS 6.4
1] Install NRPE required packages.