Raid5+Hotstandby - Samsung SVS-5R User Manual

4.1.5 RAID5+Hotstandby

SVS-5R supports RAID5+Hotstandby. Using RAID5+Hotstandby requires 4 SATA hard drives.
When configured to RAID5+Hotstandby, the SVS-5R saves data as shown in the picture below.
RAID5+Hotstandby uses 3 SATA hard drives in the RAID5 mode, while putting on the last drive
on standby.
Caution : In the RAID5+Hotstandby mode, HDD#4 in the SVS-5R is put on standby.
※
When a SATA hard drive in the RAID5 mode fails, the standby drive replaces the failed drive to
rebuild the RAID array and allow the SVS-5R to continue saving data. To ensure data stability
however, it is highly recommended that you replace the failed hard drive immediately. In the
RAID5+Hotstandby mode, total storage capacity of the SVS-5R is simply the capacity of 2
drives. It is more stable than RAID5, but has decreased storage capacity; please consider the
storage capacity before using this mode.
Block1
Block3
Parity(5,6)
[HDD#1]
Block1
Block2
Block3
Block4
Block5
Block6
Block2
Parity(3,4)
Block5
[HDD#2] [HDD#3]
SVS-5R
(RAID5+Hotstandby)
Parity(1,2) Standby
Block4
Block6
[HDD#4]