Does this support 3.5" sas drives? please don't answer unless you know the difference between sas and sata.

Though the Amazon Title says it supports SAS drives, if you go to the Kingwin website for the KF-255-BK, it says nothing about SAS, nor does the owner's manual pdf that I downloaded. I'd say it does not support the SAS connector configuration. http://www.kingwin.com/kf-255-bk-2/

Can 2.5" SSD be used with this mount?

Alone, No. Yes - With the addition of this Device: ICY DOCK EZConvert PRO MB982SP-1S Enterprise 2.5" to 3.5" SATA SSD & HDD Converter / Mounting Kit. This is what we use. Hope this helps!

2 HD sata cables. 2 power sata cables??? or just one?

2 SATA cable. 1 SATA power cable. Be aware that the triangular key entry on the locking mechanism for the the 3-1/2" drive door is made of extremely soft pot metal and after a number of locking and unlocking cycles while changing drives in and out has deformed to the point where it's unusable even though I used extreme care once I discovered this problem it just continued to get worse, so now I have to leave it unlocked. The same key entry on the 2-1/2" drive door is made of stainless steel and does not suffer from the same weakness.This is a pretty serious defect in an otherwise very good product, and if there was something like this made by a competitor that didn't suffer from this weakness, I would try that by so far I haven't been able to find anything like it. I hope KingWin will correct this deficiency in future models.

Will this kf-259-bk back plane fit a sas u.2 (sff-8639) connector?

Hi, Conscientious shopper, thank you for your question, KF-259-BK does not fit a sas u.2 sff-8639 connector, tks. Kingwin customer support

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Kingwin Universal Hot Swap Mobile Rack for 2.5” or 3.5” SSD/HDD, Internal Tray-Less SATA Hard Drive Backplane Enclosure, Support SATA I/II/III

Product ID: 3902041

Details

Brand
Kingwin
Color
black
Compatible Devices
Single Bay For
Connectivity Technology
SATA
Digital Storage Capacity
6 TB
Hard Disk Description
Mechanical

⚡6Gbps max SATA III speed

🔄50,000+ hot swap insertions

🌬️ABS material with open-air cooling

KD 10.19

Duties & taxes included

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Description

🔄 Swap drives like a pro—speed, durability, and zero downtime!

DURABLE COOL BY DESIGN - High-quality ABS enclosure with open-air ventilation extends drive lifespan.
ENTERPRISE GRADE RELIABILITY - Built for professional setups—servers, cloud storage, and media backups.
SEAMLESS HOT SWAP EXPERIENCE - Swap 2.5” or 3.5” drives instantly without powering down your system.
BLAZING FAST SATA III SUPPORT - Enjoy up to 6Gbps transfer speeds for peak data performance.
TRAY LESS UNIVERSAL COMPATIBILITY - Fits both SSDs and HDDs effortlessly—no trays, no hassle.

The Kingwin Universal Hot Swap Mobile Rack is a tray-less SATA hard drive enclosure supporting 2.5” and 3.5” SSDs/HDDs with SATA I/II/III compatibility. Engineered for up to 6Gbps transfer speeds and over 50,000 hot swap cycles, its ABS open-air design ensures optimal cooling and durability, making it ideal for professional and enterprise storage solutions.

Specifications

ASIN	B00M3WNWB2
Additional Features	Hot Swap
Best Sellers Rank	#128 in Enclosures
Brand	Kingwin
Color	black
Compatible Devices	Single Bay Mobile Rack For 2.5" or 3.5" SSD & HDD
Connectivity Technology	SATA
Customer Reviews	4.0 4.0 out of 5 stars (606)
Data Transfer Rate	6 gigabits_per_second
Digital Storage Capacity	6 TB
Enclosure Material	ABS, Acrylonitrile Butadiene Styrene
Form Factor	2.5-inch
Global Trade Identification Number	00812348012344
Hard Disk Description	Mechanical Hard Disk
Hard Disk Form Factor	2.5 inches
Hard Disk Interface	Serial ATA
Hard Disk Rotational Speed	7200 rpm
Hard-Drive Size	2 TB
Hardware Connectivity	SATA 1.5 Gb/s, SATA 3.0 Gb/s, SATA 6.0 Gb/s
Hardware Platform	PC
Item Weight	6.4 ounces
Manufacturer	KingWin
Mfr Part Number	KF-255-BK
Model Number	KF-255-BK
Number of Items	1
Specific Uses For Product	Personal
UPC	808111668627 806293518594 809186250984 863189859537 812348012344 846829563322 804066550208 809385645727 851975725166
Warranty Description	1 year

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