Instruction: Generate an answer to the question by utilizing the information contained in the document.

Input:
Question: Is an OS on this Drive
Document: Good quality, Fast Hard Drive with lots of mobile space at a great price.As always, just takes time to re-install OS and Applications.
This was a replacement drive for a HP Laptop with a crashed 5400 rpm drive. Installed new Windows 8 OS and laptop boots fast with no issues. I think the WD black hard drives are great and use them all the time when upgrading or repairing computers.
Installed 2 of these HDDs in an older HP DC7600cmt case that now holds an INTEL Z77 3rd gen SLI mobo. Having an (E) and (F) drive keeps the (C)SSD/OS drive free and clean. Using symlinks to download through the 6mbps Marvell sata ports (google: pcworld symlink, if you're unable to figure out SSDos /HDDdownloads solution)....
The Seagate Hybrid drive is very fast for frequently used files and the OS, but the failure mode I'd experienced was total loss of access - no recovery possible. OUCH!I also considered theWD Black2 Dual Drive: 120GB SSD + 1TB HDDthat I installed for a client. He is doing video editing on a laptop. It can be a good solution for certain specific kind of use.
Drive works great so far after installing clean copy of Snow Leopard and updating to Mavericks. Slight speed increase in boot-up and launching programs with Mac OS reporting the full 3Gb/s link speed possible for this particular laptop (was 1.5Gb/s before with stock 5400rpm 160GB Apple drive). Everything is stable and haven't really noticed any heat or vibration issues.Overall, great upgrade to this older laptop!
I also tried to clone my own Win 7 Ultimate SP1 laptop with the same results. I have spent many hours re-imaging this WD Black 750 GB drive with numerous utilities and nothing works to clone a fully functional  Win 7 or Vista OS on it. Microsoft offers a &#34;fix&#34; download but that did not work either. This drive does work otherwise, so I won't return it, but it will be relegated to being a data-only drive.
I installed Windows 7 replacing my XP. Figured I better use a new hard drive while I'm at it. I don't know if it is faster than my SATA 2 Hitachi Travelstar, which was fine and never died. My system doesn't have SATA 3, and OS 7 is faster than XP, so can't really compare. I can say, it is silent and has no vibrations. Saw that complaint and wondered what was up with that. Hope it lasts 5 plus years as the warranty indicates it should.
Takes a while to format and copy the OS and all the data, but works like a champ! The installation took just miniutes.
You cannot load a fully functional Win 7 or Vista OS on many of these OS drives without a lot of trouble, and maybe not at all. The most easy way to check this is to try to get the Windows Update function to work. It will not. It tells you that the service is not running and maybe you should reboot your system. There seems to be a fundamental difference in the way that different manufacturers handle AF on their drives.
In order to make this disk to perform under Linux OS, NCQ feature needs to be disabled, otherwise this disk triggers lots of errors.SATA connection is reseted every time such errors occurs, and for the user, disk seems to be slow and non-responsive.Tested with two latest releases of Debian (as of April 2014).Even after disabling NCQ is not as fast as it should be.
Answer: No, you would never expect to have anything pre-installed on a bare drive like this. Formatted maybe, but usually not. Completely empty.