Can I turn each hard drive off or are they all on one switch?

each one has a power switch. I use these for systems that require a fast clone recovery. I hook up the two top bays to power and data. Put the system drive in the top bay. Place a drive to be cloned into the center. Clone it. Then store it in the bottom not hooked up bay. In case of failure just put the spare in the online slot. Back up in seconds not hours or days.

I see this can interface with sas drives - does it act as a sas controller or does my board need to have an sas controller?

No, the HSB3SATSASBA allows SAS drives to connect but is not a SAS controller. Your computer will still need a SAS controller to read the drives. Matt, StarTech.com Support

Does anyone know if this will fit into an hp z640? worried about how it slides in and mounts with the z640's 5.25" bays.

The HSB3SATSASBA has not been tested on an HP z640. The rack uses standard 5.25" mounting points. Brandon, StarTech.com Support

will this function normally if mounted sideways?

It should, there are cases, storage devices, and NAS devices from big name manufacturers where hard drives are positioned on their side with no problems.

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StarTech.com 3-Bay Hot Swap Backplane for 3.5in SAS II/SATA III - 6 Gbps HDD - Aluminum Trayless Mobile Rack Backplane (HSB3SATSASBA),Black

Product ID: 10002128

Details

Brand
StarTech.com
Color
Black
Hardware Interface
SAS
Hardware Platform
PC
Product Dimensions
7.64"L x x

⚡6 Gbps SATA III / SAS II data transfer speed

💾3 hot-swap bays for 3.5in SATA/SAS drives

❄️Aluminum vented enclosure + fan for optimal cooling

€ 216.78

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Sold byAmazon AustriaDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

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Description

💼 Elevate your storage game with enterprise-grade hot-swap ease!

BLAZING 6 GBPS SPEED - Maximize data throughput with full SATA III and SAS II compatibility for lightning-fast transfers
COOL QUIET OPERATION - Vented aluminum chassis with adjustable fan keeps drives cool and humming silently 24/7
SECURE TOOL FREE ACCESS - Trayless design with individual ejection levers and key-lock doors for quick, safe drive swaps
TRIPLE DRIVE HOT SWAP POWERHOUSE - Seamlessly swap up to 3 enterprise-grade 3.5in SATA or SAS drives without downtime
BUILT FOR IT PROS BACKED FOR LIFE - Trusted durability with 2-year warranty plus lifetime 24/5 multilingual tech support

The StarTech.com 3-Bay Hot Swap Backplane transforms two 5.25" bays into a versatile, trayless mobile rack supporting up to three 3.5" SATA or SAS hard drives. Delivering 6 Gbps transfer speeds, it features individual drive LEDs, key-lock security, and a vented aluminum enclosure with a quiet, speed-controlled fan to maintain optimal temperatures. Designed for professional IT environments, it offers quick installation, broad compatibility, and is backed by a 2-year warranty with lifetime technical support.

Specifications

ASIN	B00HS23QZO
Best Sellers Rank	#186 in Enclosures
Brand	StarTech.com
Built-In Media	Storage mobile rack
Color	Black
Compatible Devices	PC
Connectivity Technology	SATA
Customer Reviews	4.3 4.3 out of 5 stars (572)
Data Transfer Rate	6 megabits_per_second
Enclosure Material	Aluminum
Global Trade Identification Number	00065030855297
Hard Disk Form Factor	3.5 inches
Hardware Interface	SAS
Hardware Platform	PC
Item Dimensions L x W x H	7.64"L x 5.75"W x 3.35"H
Item Type Name	Startech.Com HSB3SATSASBA 3 Bay Trayless Hot Swap 3.5" SATA HDD Mobile Rack Backplane, Storage, Black
Item Weight	0.87 kg
Manufacturer	StarTech.com
Memory Storage Capacity	6 GB
Mfr Part Number	HSB3SATSASBA
Model Number	HSB3SATSASBA
Number of Items	1
Supported Devices Quantity	3
UPC	065030855297
Unit Count	1 Count
Warranty Description	2 Years

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