Wondering about this HDD

[Hakolb]

I am soon gonna purchase a new HDD but I have a few questions.

When you open up task manager, you can see the disk usage. My usage is 100% when programs use up about 6 MB/s. Does it depend on HDD? Is it the cache that determines how much MB/s can be used?

I have recently found an amazing looking 4 TB HDD which is cheaper than most 3 TB HDDs.
http://www.toshiba.eu/hard-drives/internal-hard-drives/sata-hard-drive-desktop-md-series/px3009e-1hp0/

So I wanted to ask, what's the catch here? Why is it so cheap? Should I buy it?

 

[spooky2th]

HDD's cannot get anywhere close to or near 6GBs. They are slow. Some SSD's can get close to the 6GBs ceiling.

The 128MB cashe on that Toshiba HDD will help with the speed some but still won't get anywhere near 6GBs. It is a decent HDD.

Any drive greater than 2TB will require GPT formatting.

 

[Hakolb]

Thanks, although I still didn't understand if the disk usage in task manager is the HDD's cache.

 

[spooky2th]

When I open my task manager, I see processes, CPU usage and physical memory. No disk usage?

 

[Hakolb]

When I open my task manager, I see processes, CPU usage and physical memory. No disk usage?

I can also see disk and network usage. Are you using Windows 8?

 

[spooky2th]

I use win7 pro. I have brought up task manager in win8 systems and saw the same things I see in win7. I can bring up "disk" by clicking on "resource monitor" but it only shows the speed in KBs of data being written and etc. No usage?

 

[Hakolb]

I upload a screenshot: http://i.imgur.com/nrs4D4k.png

 

[spooky2th]

Mine changes like that from KBs to MBs when not idle. This is the speed of the data transferring back & forth from the drive. The communication between the system and the disk. It is not usage. The screen shot you sent looks like there's no problems. You might be confusing a comparison similar to apples & oranges. The hdd cashe determines how much data at one time is communicated. A 64MB cashe handles up to 64MB of data at once. The bigger the cashe, the bigger the amount of data that is communicated at one time. The larger cashe will increase the speed a little because it can handle more data.