User Guide

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RAID 10 (1+0): Combines four or more disk to create a storage space that is able to support
multiple failed disks (as long as the failed disks do not belong to the same “mirrored set”). RAID 10
provides the data protection of RAID 1 along with the access efficiency of RAID 0. With respect to
data protection, RAID 10 uses the RAID 1 method of having the exact same data written identically
on two disks, producing “mirrored sets”. These “mirrored sets” are then combined together in a RAID
0 configuration. RAID 10 requires an even number of four or more disks. When combining disks of
differing sizes, the total storage space will be calculated based on the size of the smallest disk.
Total available storage space = (size of smallest disk) * (total number of disks / 2)
About SSD Trim
Enable SSD Trim allows the SSDs installed on the NAS to maintain stable read/write performance
while simultaneously controlling the frequency of overwriting to specific blocks, extending the life of
SSDs.
Note:
 The function is only available on the following models: AS-6/50/51/61/62/70 series.
 When using an SSD in a Single, JBOD, or RAID 0/1/10 volume configuration, the Trim command
for it will be enabled automatically.
 The Trim feature under RAID 5 and 6 configurations can only be enabled on the SSDs with DZAT
(Deterministic Read Zero after TRIM) support. Please contact your SSD manufacturers for details
on DZAT support.
See More
NAS 251 – Introduction to RAID
NAS 352 – Online RAID Level Migration and Capacity Expansion
Disk
Here you can check on the status of all your disks. You can also inspect their S.M.A.R.T. information
and conduct tests on your disks.