Vantec Nexstar GX USB 3.0 Dual 2.5" SATA SSD/HDD RAID Enclosure - External Hard Drive Case for Data Backup & Storage (Black, NST-272S3-BK) - Perfect for PC, Mac, Gaming & Office Use

Many of us we don’t really think about backups until its too late, then we wonder why we never got around to having a backup, or if we did have one, why we didn’t update it. Prior to my purchase of the Vantec NST-266S3-BK, I was using portable USB drives which unfortunately have a high failure rate due to their use of Shingled Magnetic Recording (SMR) technology. These manufactures never let the consumer know that they were buying an inferior product just so they could make larger profits, that is I'd have gladly paid the same amount of money for a portable USB drive that used Conventional Magnetic Recording (CMR) technology i.e. a 750GB CMR is much better than a 1TB SMR drive.My backup scheme is as follows:Copy 1: On a 2nd drive on the local PCCopy 2: On a 2.5-inch solid state drivesCopy 3: On a 3.5-inch hard drives used in earlier systemsIn addition each machine's boot drive is duplicated in a standalone USB Disk Duplicator (Syba SY-EN50071) and stored in a folder for each PC in the file cabinet. I bought my first Vantec NST-266S3-BK in February 2021 to replace a failed SMR based USB portable drive, and have since purchased 5 more to replace the rest of the SMR based USB portable drives as they begin to fail. The Vantec NST-266S3-BK design uses the ASMedia ASM 1153E controller and when it was first designed, the largest commercially available hard drives at the time were 4TB in size with 6TB just beginning to be sampled but not in volume production. The ASM 1153E controller uses LBA48 addressing mode which means in theory the largest drive that the device can support is about 144.1 PB (the same as 144,000 TB) so there should not be an issue supporting larger drives.This device is cool to the touch, has a design which minimizes fingerprints on its case, was easy to install (they even provide screws and a screwdriver). As for ventilation, the device has many holes on one of the sides. A 2.5 inch HDD may get a little hot, but SSD's should not get that hot and many SSD's have built in thermal sensors which will throttle the drive until the temperature drops to comfortable levels.The 2.5 inch drive fits nicely in the enclosure and can be attached via the supplied screws. I used two at the far end which is enough to hold the SSD in place. Once the tray is back in the outer enclosure, another 2 screws secure it. Vantec supplied 5 of the screws needed to secure the drive to the tray and 3 to secure the tray to the enclosure i.e. 1 extra of each.On Windows 7, I was only able to see 228/222 MB/s Read/Write speeds mainly due to Windows 7 not supporting the USB Attached SCSI Protocol (UASP), however on Linux I was able to get 441/432 MB/s Read/Write since UASP support was enabled. One should get similar performance for Windows 8/10 as UASP support exists in those Operating Systems. Even though the SSD is capable of 560 MB/s (read), the top speed is capped by USB 3.0 which has a theoretical max of 500 MB/s and after accounting for overhead the results are pretty good.The SSD was recognized as an SSD and I was able to use TRIM. For those who are having problems using TRIM, open up an elevated command prompt in Windows and type the following command:fsutil behavior query DisableDeleteNotify.If DisableDeleteNotify is set to 1, rerun the command with a 0 on the end:fsutil behavior set DisableDeleteNotify 0(thanks to programmers it's a double negative). In addition both HDD and SSD support SMART through the USB cable.We use the Vantec NST-266S3-BK on both Windows (7, 8.1, 10) and Linux (Linux Mint 20.1). Again, it's a little slow on Windows 7 due to a lack of UASP support but it's acceptable and it's very fast on all the other systems.With many manufactures resorting to the use of Shingled Magnetic Recording (SMR) technology in external USB drives, this devices lets you use Conventional Magnetic Recording (CMR) technology drives which are far superior.In the attached photo I have circled the asmedia controller chip on the circuit card.Some additional notes:If you are running Windows, Windows has a feature that is enabled by default that will turn off power to USB ports. You can verify this by going into Device Manager, expanding the Universal Serial Bus Controllers, and then selecting any (and all) USB Root Hub, then in the pop-up, look for Power Management and uncheck "Allow the computer to turn off this device to save power". If you don't do that, it's possible that windows shuts power off toyour device and you experience a "disconnect".If you are running Linux, Linux has a feature that right out of the box all USB ports are disabled. If your PC goes into a sleep mode, it can be hard to wake-up the PC just by moving the mouse or pressing the space bar on the keypad and even having long transfers via this device.You can write a startup script that will enable all USB ports:(1) Save the following in a script named usbwakeup in /etc/init.dgrep disabled /sys/bus/usb/devices/*/power/wakeup | awk -F: '{print "echo enabled > "$1}' | sh -s(2) Create a link in /etc/rc3.d called S99wakeup that points to ../init.d/usbwakeupHope this helps other potential buyers or those who have purchased this product and may not have had a positive experience (i.e. they blamed the device instead of Windows).