Toshiba AL15SEBxxEx 1.8TB
Enterprise HDD
Part number AL15SEB18EQ · AL15SEBxxEx series · 2.5" SAS HDD. If your machine is listed below, this drive is officially supported — not a forum workaround.
Check AL15SEB18EQ price on Amazon partner link
No series-level recording rating is on file for this part number yet — check the exact model for CMR vs SMR before buying it as a large cold copy (SMR is the one trait that makes a 16 TB+ backup copy painfully slow). The 3-2-1 guide and the backup tools encyclopedia cover what to schedule it with.
Compatibility verdict
It appears on the official compatibility lists of 8 machines and series — 7 Synology, 1 Asustor. This is a Enterprise-class drive: rated for heavier sustained workloads than desktop drives. It is a strong pick for a NAS running 24/7, large-array rebuilds or camera workloads, and enterprise lines are also the drives most widely listed across all five vendors' HCLs. No series-level recording rating is on file for this part number yet, so check CMR vs SMR on the exact model before buying for an array.
Compatible NAS models
Same-capacity alternatives
Other drives listed at 1.8 TB capacity, ranked by how many machines list them:
Quick answers
Is the AL15SEB18EQ officially compatible with my NAS?
It appears on the official compatibility lists of 8 machines and series — 7 Synology, 1 Asustor. Every machine page linked below shows the vendor's own list entry, refreshed daily.
Is the AL15SEB18EQ a good NAS drive?
This is a Enterprise-class drive: rated for heavier sustained workloads than desktop drives. It is a strong pick for a NAS running 24/7, large-array rebuilds or camera workloads, and enterprise lines are also the drives most widely listed across all five vendors' HCLs. No series-level recording rating is on file for this part number yet, so check CMR vs SMR on the exact model before buying for an array.
Can I use the AL15SEB18EQ for a 3-2-1 cold backup copy?
No series-level recording rating is on file for this part number yet — check the exact model for CMR vs SMR before buying it as a large cold copy (SMR is the one trait that makes a 16 TB+ backup copy painfully slow). The 3-2-1 guide and the backup tools encyclopedia cover what to schedule it with.
What are alternatives to the AL15SEB18EQ?
At the same capacity, the most widely listed alternatives are Toshiba AL14SEB18EQ (7 machines), Western Digital HUC101818CS4200 - 0B27978 (6 machines), Western Digital HUC101818CS4204 - 0B31241 (6 machines). The full ranked list is below.