Verbatim POWERBAY NAS Array - Hot-Swap Function; What Is RAID

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4. Locate and install the correct printer drivers for your printer.
Click OK.
5. T
h
is wi
ll
comp
l
ete t
h
e print server setup proce
d
ure.
You can view your newly added printer in your printer and
f
axes
window.
Hot-Swap Funct
i
o
n
T
h
e PowerBay NAS array supports
h
ot-swap
d
rive trays. You can
e
j
ect or insert hard drive cartrid
g
es when the PowerBa
y
NAS arra
y
is
operat
i
ng.
However, if the hard drives are created into various levels of RAID,
y
ou
cannot hot swap all the hard drives at the same time. Hot swapping
all the hard drives will cause a loss o
f
data, and the RAID volume will
need to be re-created a
g
ain. Different levels of RAID re
q
uired various
numbers o
f
hard drives remaining in the PowerBay NAS array.
RAID
0
: I
f
any single hard drive is hot-swapped, the data will be
l
ost an
d
t
h
e array wi
ll
b
e
d
estroye
d.
RAID
1:
You can hot swap the hard drives as long as one of the
drives in the 3-drive mirror array is still in the PowerBay
NAS array. Removal of all hard drives will result in a loss
of all data and volume will have crashed. You may always
remove the spare drive provided that it has not yet been
ac
tiv
a
t
ed
.
RAID
5:
In a RAID 5 vo
l
ume, it is on
ly
p
ossi
bl
e to
h
ot swa
p
1
h
ar
d
d
rive at a time wit
h
out
l
osing a
ll
d
ata. T
h
is is
b
ecause a
RAID 5 volume can only tolerate the loss o
f
1 hard drive
and still continue to work. After hot swa
pp
in
g
a hard
drive, the volume must
fi
rst be rebuilt be
f
ore another
hard drive can be hot swapped, otherwise this will also
result in a loss o
f
all data and the RAID volume will have
crashed. I
f
you are con
fi
gured
f
or RAID5 plus Spare, you
may always remove the spare drive provided that it has
not yet
b
een activate
d.
RAID 6
:
In a RAID 6 volume, it is possible to hot swap any 2 hard
drives at a time without losing data.
The hot-swa
p
feature is onl
y
indicated b
y
the LED behavior of the
individual HDD LEDs. If the HDD is functioning normally its LED will
be solid blue. When
y
ou slide the HDD lockin
g
button to the ri
g
ht to
p
re
p
are to swa
p
the HDD, the HDD LED will
g
o o
ff
. As soon as
y
ou
insert the new HDD into the slot and slide the HDD lockin
g
button to
the le
f
t, the blue light will appear again indicating that the HDD status
is rea
d
y.
Please take note that removin
g
a disk from the PowerBa
y
NAS arra
y
and inserting it in another device is not advisable, even i
f
it is another
PowerBay NAS array. Taking such action may jeopardize the integrity
o
f th
e
da
t
a.
What is RAID
?
RAID, short for Redundant Array of Independent Disks, is storage
confi guration that combines two or more disks for the purpose o
f
providing fault tolerance and/or improving performance. There are
several different confi gurations or levels of RAID, with each providing a
different method of sharing or distributing data among the drives
.
R
AID
0
RAID 0 provides data striping, which spreads out blocks of data over
all drives, but does not
p
rovide data redundanc
y
.
Althou
g
h
p
er
f
ormance is im
p
roved, the lack o
f
f
ault tolerance means
that i
f
one drive
f
ails, all data in the array will be lost
.
R
AID 1
RAID 1 provi
d
es mirroring over mu
l
tip
l
e
d
is
k
s, wit
h
t
h
e same rea
d
/
w
rite speed o
f
a single disk. A RAID 1 array can only be as large as its
sma
ll
est mem
b
er
d
is
k
.
Because the data is stored on multiple disks, RAID 1 provides fault
to
l
erance an
d
protection.
R
AID 5
RAID 5 provides data striping with distributed parity, which stores
in
f
ormation that can be used to recon¬struct data. A RAID 5 array will
be the size o
f
all the combined disks capacity less the capacity o
f
one
disk. For example, i
f
there are 4x 500GB disks in the array, the array
capacity will be 1.5TB (3x500GB).