Hot-Swap Function; What Is Raid - Verbatim POWERBAY NAS Array User Manual

4. Locate and install the correct printer drivers for your printer.
Click OK.
5. This will complete the print server setup procedure.
You can view your newly added printer in your printer and faxes
window.

Hot-Swap Function

The PowerBay NAS array supports hot-swap drive trays. You can
eject or insert hard drive cartridges when the PowerBay NAS array is
operating.
However, if the hard drives are created into various levels of RAID, you
cannot hot swap all the hard drives at the same time. Hot swapping
all the hard drives will cause a loss of data, and the RAID volume will
need to be re-created again. Different levels of RAID required various
numbers of hard drives remaining in the PowerBay NAS array.
If any single hard drive is hot-swapped, the data will be
RAID 0:
lost and the array will be destroyed.
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
activated.
RAID 5: In a RAID 5 volume, it is only possible to hot swap 1 hard
drive at a time without losing all data. This is because a
RAID 5 volume can only tolerate the loss of 1 hard drive
and still continue to work. After hot swapping a hard
drive, the volume must fi rst be rebuilt before another
hard drive can be hot swapped, otherwise this will also
result in a loss of all data and the RAID volume will have
crashed. If you are confi gured for RAID5 plus Spare, you
may always remove the spare drive provided that it has
not yet been activated.
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-swap feature is only indicated by the LED behavior of the
individual HDD LEDs. If the HDD is functioning normally its LED will
be solid blue. When you slide the HDD locking button to the right to
prepare to swap the HDD, the HDD LED will go off. As soon as you
insert the new HDD into the slot and slide the HDD locking button to
the left, the blue light will appear again indicating that the HDD status
is ready.
Please take note that removing a disk from the PowerBay NAS array
and inserting it in another device is not advisable, even if it is another
PowerBay NAS array. Taking such action may jeopardize the integrity
of the data.

What is RAID?

RAID, short for Redundant Array of Independent Disks, is storage
confi guration that combines two or more disks for the purpose of
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.
RAID 0
RAID 0 provides data striping, which spreads out blocks of data over
all drives, but does not provide data redundancy.
Although performance is improved, the lack of fault tolerance means
that if one drive fails, all data in the array will be lost.
RAID 1
RAID 1 provides mirroring over multiple disks, with the same read/
write speed of a single disk. A RAID 1 array can only be as large as its
smallest member disk.
Because the data is stored on multiple disks, RAID 1 provides fault
tolerance and protection.
RAID 5
RAID 5 provides data striping with distributed parity, which stores
information that can be used to recon¬struct data. A RAID 5 array will
be the size of all the combined disks capacity less the capacity of one
disk. For example, if there are 4x 500GB disks in the array, the array
capacity will be 1.5TB (3x500GB).
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