Kanguru QSX - Manual (Page 16)

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3.3 raid1 (Safe)
RAID1 (SAFE) Configuration – 011
RAID1 (SAFE) storage mode saves all data in duplicate on separate drives, providing real time backup
to protect against data loss due to drive failure. RAID1 provides the highest level of protection for
critical data. One drive mirrors the other at all times. The resulting storage capacity of the RAID1
volume will be equivalent to the size of one hard drive (half the total capacity). RAID 1 mode provides
data redundancy but reduces performance because all data has to be written twice.
Building and Verifying the mirrored array
The first time you transfer data to your QSX in RAID1 storage mode, the QSX will automatically
begin building the mirrored array. After a few moments, both Hard Drive LED Indicators will turn
off, and then the Hard Drive 1 LED Indicator will blink rapidly. This indicates that the mirrored
array is being built. After the mirrored array is built the QSX will begin verifying the mirrored array.
During this time, the Hard Drive 1 LED Indicator will be on and the Hard Drive 2 LED Indicator will
blink rapidly. The entire process may take upwards of 4 hours to build the mirrored array depending
on the HDD capacity.
It is not necessary to build and verify the mirrored array in one session. You can disconnect and turn
off the QSX while the mirrored array is being built or verified and it will continue from the point
where it was stopped when power on the unit again. Warning! Until the mirrored array is built, data
is only stored to one drive and is not mirrored.
If one of the hard drive fails, the RAID1 volume is still usable, but it is in a vulnerable state because
there is no longer a mirror of your data. If this happens, one of the Hard Drive LED Indicators will
constantly blink even if there is no data being transferred.
Warning! If one of your hard drives fails, do not attempt to replace the faulty drive. Doing so will
void the warranty. If one of your hard drives fails, please contact Kanguru Solutions Tech Support at
508-966-4245.
Storage Modes
Disk 1
Disk 2
RAID 1 Volume
Capacity = (Disk 1 + Disk 2) / 2