Synology DiskStation User Manual page 51

Expand a Volume or Disk Group by Adding Disks
If you have empty hard drive bays in your Synology DiskStation, you can expand JBOD, RAID 5, RAID 5+Spare,
RAID 6, and SHR volumes or Disk Groups by adding disks.
To expand a volume or Disk Group by adding disks:
1 Install a new hard drive for your Synology DiskStation.
2 Select the volume or Disk Group you want to expand.
3 Click
the RAID by adding hard disks
4 Select the hard drive in the
5 Follow the wizard to complete the setup.
Note:
 For RAID 5, RAID 5+Spare, and RAID 6 volume or Disk Group, the hard drive size must be larger than the
smallest disk in the volume or Disk Group.
 The status of the volume or the Disk Group must be Normal.
 The status of the added disk must be
 You can also expand your volume with Synology Expansion Unit using the same way.
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Synology Expansion Unit is supported on specific models only. Please visit www.synology.com.
51 Chapter 4: Manage Storage Space
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Manage and choose Expand the volume by adding hard disks
(for Disk Group expansion).
Choose disks
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section.
Initialized or Not Initialized.
Synology DiskStation User's Guide
Based on DSM 3.1
(for volume expansion) and Expand
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