Seagate NAS OS 4 U User Manual page 118

Removing a healthy hard drive from a protected volume while the NAS OS device is powered on will render the
volume unprotected. If the volume has double-disk security, removing two healthy hard drives while the device
is powered on will render the volume unprotected. While removing healthy hard drives is not recommended,
you can avoid breaking the RAID by shutting down the NAS first. Return the hard drives to their proper slots
If a healthy hard drive has been removed while the NAS is powered on, you can reinsert it into its slot. NAS OS
synchronizes the RAID following the reinsertion of the hard drive. It is important to note that during
Important info on NAS backup: It is recommended that all users back up data to DAS or another
NAS as further protection against the loss of a hard drive and secondary points of failure (e.g.
Apart from RAID 10, protected RAID volumes can be expanded with new hard drives. However, it is not
possible to add new hard drives with inferior capacities. For example, a RAID 5 or SimplyRAID volume with
Expand a volume's storage capacity: add hard drives to the
The instructions below pertain to storage expansion in a NAS OS device with available or empty drive slots. If
you are exchanging an existing hard drive in your enclosure for a hard drive of greater capacity or, repairing a
.failed hard drive, follow the instructions in
NAS OS gives you the freedom to configure RAID volumes for your network. While it is not possible to list
.every option for expansion, review the examples below and apply them to your NAS OS device
Important info on adding hard drives: Make certain to add a new hard drive without data. While
data on the NAS OS volume is safe, performing the steps below will delete files stored on the new
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NAS performance is reduced due to a heavier demand upon the CPU
RAID protection is not available until the synchronization is complete
Older hard drives can fail, especially models that are not constructed for NAS
.hardware, network, etc.). See
Hard drive expansion and replacement
.three 2TB hard drives supports the addition of a fourth hard drive that is 2TB or higher
.Encrypted volume: Unlock the volume before following the steps below
10/18/16
Backup Manager
Repair a failed hard drive or expand storage capacity
.hard drive you are adding to the volume
.before powering on the NAS
:synchronization
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for details
enclosure
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SimplyRAID
Seagate NAS OS 4