Lots of bad reviews is it as good as people say?

I'm using two of these Startech USB 3.1's at the same time with 16TB and 18TB HDDs in them for a total of 4 drives without any problems.

I have a HD with unreparable bad sectors but still running. If I want to replace the HD, is this the best way to go? No need to by new OS?

If by unrepairable you mean SMART Current Pending Sector then offline duplication is NOT recommended. Tested on SDOCK2U33RE with a 1.5TB drive w/ 6 reported errors the duplication was still at 0% after 24 hours. Also be advised this model is NOT capable of retrieving SMART data over USB (newer chipset than older models). You're going to have to use ddrescue or such.

Can I use as docking station

I had the same question. Yes, it can be used as a dock, both bays functioning at the same time with hard drives in each bay. But be advised that this unit cannot actually achieve the advertised 10Gbps speeds -- even if using 2 SSDs in RAID 0 -- because this unit only has a single SATA III controller for both drive bays, which caps the total access speed at 6Gbps.

Can I clone a Samsung 970 evo to any other m2 ssd (intel, hp, ect)?

No, SDOCK2U313R supports 2.5" & 3.5" SATA SSD/HDD drives not NVMe based SSDs such as the Samsung 970 Evo. Atha, StarTech.com Support

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Description

🔄 Clone Like a Pro, Work Like a Boss

BLAZING FAST TRANSFERS - Harness USB 3.2 Gen 1 and eSATA for up to 5 Gbps data throughput—no bottlenecks, just pure speed.
TRUE STANDALONE CLONING - No PC needed—perform sector-by-sector duplication with up to 22 GB/min speed, ensuring exact, file-system agnostic copies.
EFFORTLESS TOOLLESS DESIGN - Top-loading toaster style with drive doors and eject buttons for quick swaps—maximize uptime and minimize hassle.
IT PRO TRUSTED RELIABILITY - Backed by 2-year warranty and lifetime 24/5 multilingual tech support—because your data deserves expert care.
UNIVERSAL DRIVE COMPATIBILITY - Clone or dock any 2.5" or 3.5" SATA HDD/SSD, including 4Kn and SATA I/II/III standards—future-proof your workflow.

The StarTech.com SDOCK2U33RE is a dual-bay standalone hard drive duplicator and docking station that supports 2.5" and 3.5" SATA HDDs and SSDs. Featuring USB 3.2 Gen 1 (5 Gbps) and optional eSATA connectivity, it enables fast, sector-by-sector cloning without a PC. Designed for IT professionals, it offers tool-less drive swapping, broad OS compatibility, and robust support, making it an essential tool for efficient data duplication and recovery.

Specifications

Material	Plastic
Item weight	0.5 Kilograms
Memory storage capacity	4 TB
Compatible devices	Desktop, Laptop
Hard disk form factor	3.5 Inches
Max number of supported devices	1
Data transfer rate	5 Gigabits Per Second
Global Trade Identification Number	00065030855884
Manufacturer	StarTech
UPC	065030855884
Product Dimensions	18.69 x 12.09 x 21.01 cm; 500 g
Item model number	SDOCK2U33RE
Series	SDOCK2U33RE
Form Factor	2.5 inches, 3.5 inches
Hard Drive Size	4 TB
Hard Disk Description	Solid State Drive
Hard Drive Interface	USB 3.2
Hard Disk Rotational Speed	1
Operating System	DOS 6.xx, Windows (8, 7, XP / 2003 / Vista) and Linux operating system
Are Batteries Included	No
Item Weight	500 g
Guaranteed software updates until	unknown

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