Netgear RN212 – 2 BAY Desktop ReadyNAS Storage Guida Al Software
If you set up email notifications for your system, you receive an email message when the process
finishes. For more information about alert notifications, see
finishes. For more information about alert notifications, see
on page 148.
3.
on page 36 and
on page 36 until you replace each disk in the volume with a
larger-capacity disk.
Add Protection to a Volume
You can set up protection against disk failure. The types of protection available depend on the number of
hard disks installed in the ReadyNAS system.
hard disks installed in the ReadyNAS system.
Add Protection to an X-RAID Volume
X-RAID requires a minimum of two hard disks to provide protection against disk failure. To add protection
from disk failure to a one-disk ReadyNAS storage system, you must add a second disk that is at least as
large as the first. You can add it while the system is running. For more information about how to add a disk
to your system, see the hardware manual for your system, which is available at
from disk failure to a one-disk ReadyNAS storage system, you must add a second disk that is at least as
large as the first. You can add it while the system is running. For more information about how to add a disk
to your system, see the hardware manual for your system, which is available at
An X-RAID volume that includes two or more disks is automatically formatted to protect against the failure
of one disk. Except for very large ReadyNAS systems (for example 12-bay systems, if you want to protect
your data against the failure of two disks, you must switch to Flex-RAID and select RAID 6. (Very large
ReadyNAS systems use RAID 6 by default.) To use RAID 6, you must install four or more disks. For more
information about how to switch to Flex-RAID, see
of one disk. Except for very large ReadyNAS systems (for example 12-bay systems, if you want to protect
your data against the failure of two disks, you must switch to Flex-RAID and select RAID 6. (Very large
ReadyNAS systems use RAID 6 by default.) To use RAID 6, you must install four or more disks. For more
information about how to switch to Flex-RAID, see
on page 25.
Add Protection to a Flex-RAID Volume
In certain cases, you can add a disk to a Flex-RAID volume to increase data protection. The following table
indicates whether adding a disk for data protection is possible for each Flex-RAID configuration.
indicates whether adding a disk for data protection is possible for each Flex-RAID configuration.
Table 3. Flex-RAID levels and data protection
Can I add a disk to for data
protection?
protection?
RAID Level
Number of Disks per Volume
Yes. Converts to RAID 1. (Additional
disk provides redundancy.)
disk provides redundancy.)
JBOD
1
No. (Volume protection is already
redundant.)
redundant.)
RAID 1
2
No. (RAID 0 does not offer protection.)
RAID 0
2 or more
Yes. (Additional disk provides dual
redundancy and converts the volume to
RAID 6.)
redundancy and converts the volume to
RAID 6.)
RAID 5
3 or more
No. (Volume protection is already
redundant.)
redundant.)
RAID 10
4 or more (even number)
No. (Volume is already protected with
dual redundancy.)
dual redundancy.)
RAID 6
4 or more
Disks added to a Flex-RAID volume can be used only for protection. They cannot be used for storage
(horizontal expansion). If you want to add a disk for increased storage capacity, you must do one of the
following:
(horizontal expansion). If you want to add a disk for increased storage capacity, you must do one of the
following:
Volume Configuration
37
ReadyNAS OS 6.6