Rosewill RX200R-APU3-25B, User Manual

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If one drive fails, the RAID1 volume is still usable, but is in a
vulnerable state because its mirrored hard drive is inaccessible.
When the offline drive comes back online, the appliance begins a
brebuild process immediately to restore data redundancy.
Although the volume remains available during the rebuild process,
the volume is susceptible to data loss through damange to the
remaining drive until redundancy is restored at the end of the
brebuild and verification process. Host access takes precedence
over the rebuild process. If you continue to use the SAFE volume
during the rebuild, the rebuild process will take a longer time to
complete, and the host data transfer performance will also be
affected.
Any nod within a cascaded configuration can be set to RAID1, but
it is more efficient to use the RAID1 policy at the lowest possible
level within the hierarchy.
It is also possible to create a RAID1 volume using one hard disk
drive connnected to port0 of the storage reference design, although
no mirroring will occur until a second hard disk hdrive is connected
to port1. wWith only one hard disk drive connected, the RAID1
volume will be available, although no data protection will be provided
until a second hard disk drive is connected.
Virtual Raid1
volume
Capacity is the
same aas one
hard drive.
Capacity is the
smaller of unequal
hard drive
120 Go 120 Go
Drive A
120 GB
Drive B
120G GB
Drive A
120 GB
Drive B
500 GB
Port0 Port1 Port0 Port1
Equal hard drive Unequal hard drives