Question 1

Is this a bulk/OEM drive or is RETAIL?

Accepted Answer

If I remember right, it was bulk.  Not sure if I ever got much more when I purchased drives as retail.  Apologies that I don't recall completely.

Question 2

how loud are the 8/10TB drives? how does it compare to 4TB WD blue and 6TB Toshiba X300. i plan on using this in my desktop PC so the noise matters a lot to me.

Accepted Answer

I purchased two drives and installed them in a QNAP TS-251 (small NAS with no sound insulation).  I do not hear the drives spinning.  But, the movement of the head is relatively loud in comparison to other drives.  If the computer is on the floor under the desk, you may not notice the noise, but if it is on the desk next to your monitor, the noise can be annoying.  Hope that helps.

Question 3

why only 2 years warranty on over 500 dlls and 10 gbs ? something fishy here!

Accepted Answer

In the US, it has a 5 year warranty (assuming that you buy a US-market unit).

Question 4

What is the sustained r/w performance?

Accepted Answer

From the data sheet on the manufacturer's website it is 249 MB/s sustained.  The highest by a decent margin of all of their Gold series drives

Brand	WD
Series	Gold
Model	WD101KRYZ
Packaging	Bare Drive

Capacity	10TB
Cache	256MB
Average Latency	6Gb/s

Features	Specifically designed for use in enterprise servers, datacenter servers, and storage systems Tested for 24x7x365 reliability at workloads up to 550TB per year High level of reliability with up to 2.5 million hours MTBF Performance-optimized for heavy application workloads
Usage	For Enterprise Storage

Form Factor	3.5"
Height (maximum)	26.10mm
Width (maximum)	101.60mm
Length (maximum)	147.00mm

WD Gold 10TB Enterprise Class Hard Disk Drive - 7200 RPM Class SATA 6Gb/s 256MB Cache 3.5 Inch - WD101KRYZ

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Item#: N82E16822235131