Seagate Exos X18 18TB vs Toshiba MG09 HDD 18TB
Neither Seagate Exos X18 18TB nor Toshiba MG09 HDD 18TB wins outright — each takes something the other gives up, so the pick is which of those you want.
| Specification | SeagateExos X18 18TB | ToshibaMG09 HDD 18TB |
|---|---|---|
| Capacity (GB) | 18000 | 18000 |
| Current best price | $919.15betterat Amazon.ca · captured 2026-09-13 | $1,288.84at Amazon.ca · captured 2026-09-13 |
| Price per TB | $51.06better | $71.60 |
| RPM | 7200 | 7200 |
| Cache (MB) | 256 | 512better |
| Form factor | 3.5-inch | 3.5-inch |
| Warranty (years) | 5 | 5 |
How these two compare
Sequential throughput
Seagate Exos X18 18TB is rated 270 MB/s read and 270 MB/s write; Toshiba MG09 HDD 18TB, 281 MB/s read and 281 MB/s write. On a mechanical drive read and write track closely — platter speed and data density set the rate, not the direction — so it is the read figure that separates them, and Toshiba MG09 HDD 18TB carries the higher one.
Price
Seagate Exos X18 18TB is $919.15 ($51.06 per TB); Toshiba MG09 HDD 18TB is $1,288.84 ($71.60 per TB).
Spindle speed
Seagate Exos X18 18TB and Toshiba MG09 HDD 18TB both spin at 7200 RPM, so neither reaches data sooner than the other; at that shared speed the usual trade — quicker access against more power draw and noise — falls the same way for both.
Cache
Seagate Exos X18 18TB ships with 256 MB of cache built in, Toshiba MG09 HDD 18TB with 512 MB. The buffer lets the drive take in a burst of writes before the platter catches up and keeps recently read data close — useful under mixed, stop-start load, less so for a single large copy.
Warranty
Seagate Exos X18 18TB is warranted for 5 years, Toshiba MG09 HDD 18TB for 5. The cover is the maker's own commitment; a longer one usually signals a drive built for heavier duty, though it is the mechanism, not the paperwork, that has to last.
Which to buy
It comes down to which you value more: Seagate Exos X18 18TB and Toshiba MG09 HDD 18TB each lead the other somewhere the site tracks. Read the sections above for which edge — capacity, spindle speed, cache — fits your use.
Common questions about this pair
- Which is faster, Seagate Exos X18 18TB or Toshiba MG09 HDD 18TB?
- Seagate Exos X18 18TB is rated 270 MB/s read and 270 MB/s write; Toshiba MG09 HDD 18TB, 281 MB/s read and 281 MB/s write. On a mechanical drive read and write track closely — platter speed and data density set the rate, not the direction — so it is the read figure that separates them, and Toshiba MG09 HDD 18TB carries the higher one.
- Which costs less per terabyte, Seagate Exos X18 18TB or Toshiba MG09 HDD 18TB?
- Seagate Exos X18 18TB is $919.15 ($51.06 per TB); Toshiba MG09 HDD 18TB is $1,288.84 ($71.60 per TB).
- Should you buy Seagate Exos X18 18TB or Toshiba MG09 HDD 18TB?
- It comes down to which you value more: Seagate Exos X18 18TB and Toshiba MG09 HDD 18TB each lead the other somewhere the site tracks. Read the sections above for which edge — capacity, spindle speed, cache — fits your use.