Seagate Exos X18 ST18000NM000J 18 TB SATA
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Helium filled body.
The information in the model description is for reference purposes.
Always clarify the specifications and configuration of the product with the online store manager before purchasing.
Catalog Seagate 2026 - new arrivals, bestsellers, and the most relevant models Seagate.
Always clarify the specifications and configuration of the product with the online store manager before purchasing.
Catalog Seagate 2026 - new arrivals, bestsellers, and the most relevant models Seagate.
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Seagate Exos X18 ST18000NM000J 18 TB Hard Drive - Internal - SATA (SATA/600) - Storage System, Video Surveillance System Dev | $369.99 |  | |||
HP MB012000JYCJF HP 12TB 7200RPM Serial Attached SCSI (SAS) 12Gb/s 512e 3.5-inch Hard Drive Refurbished MB012000JYCJF | $517.45 |  | |||
Seagate 18TB Exos X18 7200 RPM SATA 6Gb/s 256MB Cache 3.5-Inch Enterprise Hard Drive HDD (ST18000NM000J) ST18000NM000J | $750.00 |  | |||
Seagate ST18000NM000J Seagate Exos X18 18TB 7200RPM SATA 6Gb/s 256MB Cache 3.5-Inch Enterprise Hard Drive Refurbished ST1800 | $886.32 | | |||
Seagate - 18TB Exos X18 7200 RPM SATA 6Gb/s 256MB Cache 3.5-Inch Enterprise Hard Drive HDD (ST18000NM000J) - OEM | $1,063.93 |  | |||
Series Seagate Exos (TCO)Compare using chart →
16 TB, built-in, server, helium, 3.5 ", buffer: 256 MB, 7200 rpm, connection: SATA3, warranty 5 years
14 TB, built-in, server, helium, 3.5 ", buffer: 256 MB, 7200 rpm, connection: SATA3, warranty 5 years
8 TB, built-in, server, 3.5 ", buffer: write CMR, 7200 rpm, connection: SATA3, warranty 5 years
28 TB, built-in, server, helium, 3.5 ", buffer: 512 MB, write CMR, 7200 rpm, connection: SATA3, warranty 5 years
14 TB, built-in, server, helium, 3.5 ", buffer: 256 MB, 7200 rpm, connection: SAS, warranty 5 years
2.4 TB, built-in, server, 2.5 ", buffer: 256 MB, 10000 rpm, connection: SAS, warranty 5 years
12 TB, built-in, server, helium, 3.5 ", buffer: 256 MB, 7200 rpm, connection: SATA3, warranty 5 years
1.2 TB, built-in, server, 2.5 ", buffer: 128 MB, 10000 rpm, connection: SAS, warranty 5 years
24 TB, built-in, server, helium, 3.5 ", buffer: 512 MB, 7200 rpm, connection: SATA3, warranty 5 years
16 TB, built-in, server, helium, 3.5 ", buffer: 256 MB, 7200 rpm, connection: SAS, warranty 5 years
30 TB, built-in, server, helium, 3.5 ", buffer: 512 MB, write CMR, 7200 rpm, connection: SATA3, warranty 5 years
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Model overview based on user reviews
The Seagate Exos X18 is a high-capacity hard drive, available in various configurations, including the ST18000NM000J model, which offers up to 18 TB of storage. Users appreciate its CMR technology, which ensures reliability and fast performance, with read/write speeds reaching up to 370 MB/s. It is noted for being very quiet compared to other models, making it ideal for NAS systems. However, some users have experienced strong vibrations and loud noises during operation, which can be concerning. Despite these issues, the drive passes functionality tests and is not considered defective under warranty. Overall, it is recommended for those seeking a reliable, high-capacity storage solution, although the price may be a consideration for some buyers.
Pros
Cons
CMR Large capacity Very quiet Fast Reliable Price at time of purchase  Talgat Kuderbekov: use Seagate ST18000NM000J more than year |
When the disc is turned on, the noise is simply infernal, it feels like it's tearing apart from the inside. At low writing speeds, it makes noise, creaks, and sputters. But the most interesting part is that it passes the functionality test. And under warranty, they don't take it back - this is supposedly a normal condition for this disc. 18 TB of capacity (although actually 16.5 available) Strong vibrations and loud extraneous noises during operation Evgeniy: use Seagate ST18000NM000J less than month |
Great HDD. It works on a single-board computer and runs its own Nextcloud cloud. It's fast and almost doesn't heat up - under heavy load for 2 hours, it showed 41°C, and without load around 37°C. Which is just ideal! But this is a so-called toaster-type NAS, the disks stand vertically and cool down very well without fans. Those who complain about the noise - well, you saw before buying that this is a server disk and not a desktop one, right? Although in my case, I wouldn't say it works very loudly. Speed, low temperature missing Valeriy: use Seagate ST12000NM000J few months |
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We recommendCompare using chart →
18 TB, built-in, server, helium, 3.5 ", buffer: 256 MB, write CMR, 7200 rpm, connection: SATA3, warranty 5 years
18 TB, built-in, server, 3.5 ", buffer: 256 MB, 7200 rpm, connection: SATA3, warranty 5 years
18 TB, built-in, server, 3.5 ", buffer: 512 MB, 7200 rpm, connection: SATA3, warranty 3 years
18 TB, built-in, server, 3.5 ", buffer: 512 MB, 7200 rpm, connection: SATA3, warranty 5 years
18 TB, built-in, for PC, 3.5 ", buffer: 512 MB, write MAMR, 7200 rpm, connection: SATA3, warranty 5 years
One 120mm cooler is enough for cooling, with it the hard drives heat up to no more than 30-35 degrees.
The hard drive starts up very smoothly, no clicks or vibrations, even when parked. And only during high load, if you get close to the server, you can hear the heads moving.
When copying/reading, it produces stable 270-290 MBs, sometimes it accelerates to 370 MBs.
Overall, I am very pleased with the purchase, and I recommend it to anyone looking for a good CMR drive.