Rocstor
Rocpro T24
[24]
RAID 1 (Mirroring)
RAID 1 (Mirroring) consists of at least two drives storing duplicate copies of the same data. In this
configuration (mode) the data is simultaneously written to two drives (HDD or SSD). Thus, the storage
capacity of a two-disk (SSD) array is combined into a single disk and the capacity is limited to the size of the
smallest disk. The speed of operation is average in comparison to other RAID modes.
In Mirroring mode, if one of the drives (HDD or SSD) fails, either source or spare disk, the data is still
available. However, if the source disk fails during the rebuild process, the data in both drives will be
lost.
It is NOT recommended to do H
ot Swap
for the source disk during the rebuild process because the
data in both disks will be lost.
RAID 1+0 (10)
In RAID 1+0, the data is first mirrored and then striped. Under this RAID Mode, it provides another way to
achieve higher performance and data security, while increasing complexity.
The speed of operation is average in comparison to other RAID modes (except RAID 0).
The key difference between RAID 1+0 and RAID 1+0 is that RAID 1+0 creates a striped set from a series of
mirrored drives. In a failed disk situation, RAID 1+0 performs better because all the remaining disks can
continue to be used. The array can sustain multiple drive losses as long as none of the mirror set loses all of its
drives.
RAID 1+0 (10) requires a minimum of four (4) hard drive/SSDs in an array. If one of the hard
drive/SSDs becomes defective, the original and identical backed up data is still available offhand