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The following reference table shows the maximum capacity that can be used based on different data redundancy mechanisms.

You can select the bay count that matches your required capacity and data redundancy mechanism.

Select the drive capacity you would like to use.

Bays RAID Type
RAID 1 (Mirrored) RAID 5 (1 Disk Redundancy) RAID 6 (2 Disk Redundancy)
1-Bay NA NA NA
2-Bay 20 TB NA NA
4-Bay 20 TB 60 TB 40 TB
5-Bay 20 TB 80 TB 60 TB
6-Bay 20 TB 100 TB 80 TB
8-Bay 20 TB 140 TB 120 TB
12-Bay 20 TB 220 TB 200 TB
1-Bay NA NA NA
2-Bay 18 TB NA NA
4-Bay 18 TB 54 TB 36 TB
5-Bay 18 TB 72 TB 54 TB
6-Bay 18 TB 90 TB 72 TB
8-Bay 18 TB 126 TB 108 TB
12-Bay 18 TB 198 TB 180 TB
1-Bay NA NA NA
2-Bay 16 TB NA NA
4-Bay 16 TB 48 TB 32 TB
5-Bay 16 TB 64 TB 48 TB
6-Bay 16 TB 80 TB 64 TB
8-Bay 16 TB 112 TB 96 TB
12-Bay 16 TB 176 TB 160 TB
1-Bay NA NA NA
2-Bay 14 TB NA NA
4-Bay 14 TB 42 TB 28 TB
5-Bay 14 TB 56 TB 42 TB
6-Bay 14 TB 70 TB 56 TB
8-Bay 14 TB 98 TB 84 TB
12-Bay 14 TB 154 TB 140 TB
1-Bay NA NA NA
2-Bay 12 TB NA NA
4-Bay 12 TB 36 TB 24 TB
5-Bay 12 TB 48 TB 36 TB
6-Bay 12 TB 60 TB 48 TB
8-Bay 12 TB 84 TB 72 TB
12-Bay 12 TB 132 TB 120 TB
1-Bay NA NA NA
2-Bay 10 TB NA NA
4-Bay 10 TB 30 TB 20 TB
5-Bay 10 TB 40 TB 30 TB
6-Bay 10 TB 50 TB 40 TB
8-Bay 10 TB 70 TB 60 TB
12-Bay 10 TB 110 TB 100 TB
1-Bay NA NA NA
2-Bay 8 TB NA NA
4-Bay 8 TB 24 TB 16 TB
5-Bay 8 TB 32 TB 24 TB
6-Bay 8 TB 40 TB 32 TB
8-Bay 8 TB 56 TB 48 TB
12-Bay 8 TB 88 TB 80 TB
1-Bay NA NA NA
2-Bay 6 TB NA NA
4-Bay 6 TB 18 TB 12 TB
5-Bay 6 TB 24 TB 18 TB
6-Bay 6 TB 30 TB 24 TB
8-Bay 6 TB 42 TB 36 TB
12-Bay 6 TB 66 TB 60 TB
1-Bay NA NA NA
2-Bay 4 TB NA NA
4-Bay 4 TB 12 TB 8 TB
5-Bay 4 TB 16 TB 12 TB
6-Bay 4 TB 20 TB 16 TB
8-Bay 4 TB 28 TB 24 TB
12-Bay 4 TB 44 TB 40 TB
1-Bay NA NA NA
2-Bay 3 TB NA NA
4-Bay 3 TB 9 TB 6 TB
5-Bay 3 TB 12 TB 9 TB
6-Bay 3 TB 15 TB 12 TB
8-Bay 3 TB 21 TB 18 TB
12-Bay 3 TB 33 TB 30 TB
1-Bay NA NA NA
2-Bay 2 TB NA NA
4-Bay 2 TB 6 TB 4 TB
5-Bay 2 TB 8 TB 6 TB
6-Bay 2 TB 10 TB 8 TB
8-Bay 2 TB 14 TB 12 TB
12-Bay 2 TB 22 TB 20 TB
1-Bay NA NA NA
2-Bay 1 TB NA NA
4-Bay 1 TB 3 TB 2 TB
5-Bay 1 TB 4 TB 3 TB
6-Bay 1 TB 5 TB 4 TB
8-Bay 1 TB 7 TB 6 TB
12-Bay 1 TB 11 TB 10 TB

To learn more about the avaialble capacity coresponding to different RAID types, refer to Synology's RAID calculator.

  1. 1-bay models do not provide data redundancy mechanisms. The available capacity equals the single disk capcity.