User manual

48
Knowledge Base
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 in 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
require various numbers of hard drives remaining in the PowerBay NAS array.
RAID 0: If any single hard drive is hot-swapped, the data will be 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 first 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 configured for RAID 5 plus Spare, you
may always remove the spare drive provided that it has not yet been acti-
vated.
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.
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