WD Green 1TB, very slow write?

[wrenaudrey]

Just bought and installed 2x 1TB WD Greens.

Im using these as backup drives for photos/music/etc.etc.

Right now im trying to back up 101GB worth of data into these two drives, not at the same time.

From my 2TB external(USB3), connected through USB 3 from the I/O at the back, it starts off at around 90MB/s then eventually reaches 20 then 10 and lower, pic:

Trying to backup the same set of files/data, this time from a 1TB Samsung F3 Spinpoint(SATA2) plugged into the SATA motherboard header, i get around the same write speeds eventually:

Is there something wrong with the Green drives?
Why is it so slow?

EDIT: Oh the WDGreens are connected through the motherboard's SATA 3 headers.

EDIT2:
I think one of the drives has died.
1. Its not being detected in BIOS
2. If i try to boot, it takes forever, i think its waiting for the green drive to respond.
3. I have 'Hot-Swap' in BIOS enabled, and if i go to plug it in while booted, 'My Computer' freezes
4. I did 'initialize' the drive before i was trying to write stuff on it, through Disk Management so it if formatted.
5. I open DiskMan now and i cant even do anything to the drive:

 

[cooperman]

Large file's transfer much faster than very small file's especially when you are trying to send 25 thousand files at a time+the green drives are slow 5500 rpm up to 7200 rpm (variable rpm) there not made to be fast thay are made to spin less to save power.

 

[wrenaudrey]

Large file's transfer much faster than very small file's especially when you are trying to send 25 thousand files at a time+the green drives are slow 5500 rpm up to 7200 rpm (variable rpm) there not made to be fast thay are made to spin less to save power.

I thought of that, so i tried copying a movie to it ~1.5GB, it still went sub 10MB/s
But i think the drive has died, look at my EDIT2 on first post.

 

[Bang]

How would a 1TB Blue stand up next to this performance wise. It just so happens that as I was reading this thread I was on a website pricing these very drives. Now I'm thinking "Thanks for the warning!! I wont get a green!"

Both drives happen to be the exact same price.

 

[NeverBackDown]

Blue is much faster than a Green. Green is for power saving and Blue is for quick storage access(though the black is still faster).

 

[vorticalbox]

How fragmented is the driver? Could be that the driver is looking all over the place for the files.

I have a green drive too, i get anywjere from 10 to 100 mb/s

 

[wrenaudrey]

How would a 1TB Blue stand up next to this performance wise. It just so happens that as I was reading this thread I was on a website pricing these very drives. Now I'm thinking "Thanks for the warning!! I wont get a green!"

Both drives happen to be the exact same price.

I have since returned the Green drives as they were too slow for my liking, as stated above, it was going down to <10MB/s.

So i swapped them for blues, blues are great, no slow write BS cause of it being 'green'/'power efficient'.
I was sustaining 95-120MB/s writes, i dont know if the drive i was copying from was acting as a bottleneck; i was copying from a Samsung F3 which is a SATA-2.

Acoustics wise, the blue was a little bit louder, and i mean a little. But it didnt really matter for me as it was plugged into the hot-swap bay for max 2hrs just to manually back up files and i'll probably only do this twice per month.

Hope this helps.