Moving to a new hard drive

Lets say you want to migrate your system to a new hard drive.
Of course the best practice is to buy a hard drive with the exact same size. This will save you problems.

I think instead of changing the files where disk UUIDs reside just swap UUIDs between the old and new disk.

invalid partition -- table wrong signature 0
This means something went wrong with the partition table and you want to use fdisk to write a valid partition table.

Prelinking

There is an extensive discussion about benefits and disadvantages of this features.
I have decided to disable it.

1. open “/etc/sysconfig/prelink” in a text editir (such as vi)
2. you should see this line: PRELINKING=yes
3. change ‘yes’ to ‘no’
4. save the change you just made & exit the text editor
5. manually run “/etc/cron.daily/prelink” as root.
6. prelinking is now disabled and will not reactivate the next time you reboot.

CryptoLocker is back!

Unfortunately this dangerous ransomware has reappeared on the network and managed to inflict heavy damages to business across the Europe especially Spain and then UK.
Bad guys have figured out how to effectively penetrate antispam and antivirus scanning gateways including Symantec.cloud.
Someone has bought the source code and released upgraded malware collecting ransom from desperate businesses.

SSHD, SSD and Windows

These disks will save reputation of Microsoft because performance of Windows systems on traditional hard drives is bad. It happens to me to turn on this system from time to time and experience the difference.

VMware: I/O pass-through devices

This has to do with all sorts of backup tape drives (HP, IBM) including external ones that are not supported by VMware, but you still want to make use of them on one of your VMs.
Follow THIS article and bear in mind that you will have to restart the hypervisor once then destination VM another time.

Exchange: 2007 SP3 to 2013 SP1 migration

This guide is a bit messy, but will prove to be useful as I went through all the fires of Exchange migration:

Install SP3 on the current 2007 Exchange server
Get-ExchangeServer | Format-Table Name, *Version*
Very important to double check that SP3 is in place
if the version does not equal 8.3.083.6 it is not SP3
Perform Health Check of AD and Exchange by running BPA for SBS 2008
Run a full backup overnight on the Exchange server
To be honest with SP1 there was no updates to Exchange at the time I was doing the migration

Upgrade the schema on SBS Server 2008 to support Windows 2012.
Join the new SERVER to domain
Install Exchange 2013 SP1 Continue reading Exchange: 2007 SP3 to 2013 SP1 migration