Hitachi HF-W2000 Instruction Manual page 281

10. SOFTWARE RAID1
● Maintenance of a RAID1 system requires a high level of expertise. Should any
mistakes be made during the work, the data stored on the HDDs may be lost.
● When HDD1 and HDD2 are installed, their capacities must be the same.
RAID1 (Redundant Array of Indepensive Disks Level 1) is a technology generally referred
to as "Disk mirroring". The Software RAID1 is not the Disk mirroring by the RAID controller
(Hardware). The Software RAID1 constructs the system that two HDDs are combined and
managed as one RAID1 system (array) by software. Should one HDD fail, you can read
correct data from the other HDD. RAID1 uses two HDDs but the capacity available is only
equal to the capacity of one HDD.
NOTICE
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