MDD (MDD18TSATA25672E) 18TB 7200 RPM 256MB Cache SATA 6.0Gb/s 3.5" Internal Enterprise Hard Drive - 5 Years Warranty (Renewed)

These are ST18000NM014J-2WS103 drives, AKA Seagate Exos X18's.One major thing to note is that these are SATA version 3.3, and the most important change to SATA 3.3 is that they changed the power connector pinout. Pins 1 through 3 used to all be a +3.3V power input, and almost all power supplies supply that 3.3v through the SATA connector to all 3 pins (and most drives don't need 3.3V anyway), now pin 3 on the power connector is actually PWDIS (Power Disable) and, if 3.3V is supplies to that pin, the drive will power down (or in the case of it always being supplied, never power on in the first place). You will want to state on your listing that these are SATA revision/version 3.3V and may not power on with older power supplies that are not SATA v3.3 compatible without modification. SOME new power supplies have cables that just don't have a 3.3V power line, but all 12 of my power supplies all had it, with 2 power supplies being under 2 months old.See the WikiPedia listing for SATA under the SATA revision 3.3 subheadingThere are a few fixes:1. Pulling the 3.3V pin/line out of the connector, this involved tracing back the line from the SATA end of the connector to the power supply and cutting/de-pinning that specific wire. The 3.3V line is closest to the downward jet-out of the connector which is where pin 1 starts at. Most drives don't actually use the 3.3V line and can be omitted. Most cheap drive docks and adapters don't have the orange 3.3v line.2. Pulling the 3.3v line out of the SATA connectors just for the drives that aren't compatible, this may not be possible to do on sealed connectors but the ones that have a cap where you can access the connector splice. Just pull upward on the line from both sides of the connector (if it's not an end piece) and the wire will pop out. Use some electrical tape to make sure it cannot contact anything else inside the case.3. Use a Molex to SATA adapter (Molex does not have a 3.3v line)4. Tape off the first 3 pins of the drive's connector with kapton tape. If you google this, you will find the information. I don't suggest this method.5. Buy a compatible power supply or cables, if they are SATA version 3.3 compatible, they will only have 4 wires and not 5 on the SATA cable.On to the review itself:The good:- Drives came in REALLY well packaged. They came in a box with padding specifically designed and slotted for hard drives. Each drive was individually sealed in an anti-static bag and the box itself had warnings on how to handle the package and also that the drives shouldn't be opened in freezing temperatures due to condensation in the anti-static bag.- Drives work great, no DOAs out of 6 drives, none with any issues or noises.- Drives passed a full 4 day burn in with no bad blocks or read errors.- Drives LOOK new, but it's hard to tell.- Drives perform like new and are quiet- Drives are CHEAP compared to their retail new counterparts.- Took me a little bit of time to figure out that these were SATA 3.3 drives and get them working. I emailed the seller/vendor and asked if anything was weird about these drives because I couldn't imagine that all 6 were DOA. They responded within a few hours and pre-emptively sent me a return label and RMA for all 6 in case I needed it. Seemingly very responsive company and luckily I figured out my issue and didn't need to return them.The bad:- Labels are obviously not original and is rebadged. I would have preferred to see the original labels on there but there may be a reason they can't be. These could be manufacturer rejects for non-performance/reliability issues, and Seagate requires their name to NOT be on them, but who knows.- If they are actually used, the SMART data has been wiped somehow. If they aren't used, then this is actually belongs in the good section.- SATA 3.3 was a bit of a pain in the rear, but this is kind of a good thing because that means these are pretty recent drives that are up to the current specs.Time will tell, but these actually seem like a really good bargain. Your mileage may vary, but if you have a RAID with some redundancy, you should be fine. They really put some effort into these drives one way or another. :-D

Don't expect this budget drive to last forever, but at the price, I couldn't resist. Got a spare for backup of stored files, in case this one fails. The enterprise version seems to run a bit cooler than the NAS version. Both make strange noises when initializing, but I guess that's normal. I use these for storage only, so hours runtime will be low, making this the perfect drive for backup. I have used a well-known manufacturer for most builds, but that one (WDgreen) is more than double the cost of the MDD drive.

I replaced an ancient Drobo 5 disk raid set with this single drive. The raid set was used as a nearby archive and storage for raw footage and pictures. It was never very fast and I found that I didn't require it to be. In replacing it, I moved to a single drive with a cloud backup to protect the contents of it. This decreased the power load and enabled me to trash the obsolete array.Transfer rates of 170MB/s read and 166MB/s write are abysmal in the age of NVMe storage, but it's still respectable for a spinning drive. I've been running it for about 7 months now without any error.

Well! I was apprehensive at first in purchasing (renewed)...BUT! I said to myself..." what the hell" I knew that I wouldn't be able to find 18tb storage for a measly $159 anywhere else including Ebay. The drive arrived very well packaged and in a sealed anti-static bag. Physically it looked new except for a very small ding. I was worried that my external dual HDD and 5 bay dock stations would not recognize it because these drives have the newer SATA 3.3. Surprisingly, it was detected without any problem. Before putting it to work as my main backup drive, I torcher tested it by putting it through many writing and reading tests. It took me more than 48 hours to complete. Fortunately it past all the tests with flying colors and it was whisper quiet. Also, I figured even if it does die, I have 5yrs warranty and from what I've read, MDD is very good at replacing their defective drives.

I put one in my NVR for camera surveillance and works great. I added a quick 16.3TB usable space and thinking about adding a couple more to get even more history with my 20+ cams. Handles the write activity just fine.

DOA, besides that the shipment arrived very late the disk does not work

Works

Cheaper enough.But It very like Seagate HDD