Synology DiskStation User Manual page 33

For SHR volumes:
1 Determine the number of replacement disks required for capacity expansion:
 If all the hard disks of the SHR volume are of equal size, at least two replacement disks of larger size should
be used.
 If the hard disks of the SHR volume are of different sizes, please follow the below guidelines to replace the
disk:
a Order the disks from largest to smallest.
b The replacement disk should be the largest among all disks.
2 Judging from the conditions mentioned above, replace one disk with another of larger size.
3 Log in to DSM as admin, and go to
4 Select the volume you want to expand (marked as Degraded), click Manage, select Repair, and then follow
the wizard to initialize the new disk and repair the volume.
5 When the status of the volume is changed from
next disk.
6 The system will expand the volume or Disk Group automatically.
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 Manage and choose
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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1
Synology Expansion Unit is supported on specific models only. Please visit www.synology.com.
33 Chapter 4: Manage Storage Space
Main Menu > Storage Manager
Degraded
Expand the volume by adding hard disks
(for Disk Group expansion).
Choose disks section.
Initialized or Not Initialized.
Synology DiskStation User's Guide
> Volume.
to Normal, repeat the above steps to replace the
(for volume expansion) and
1
Based on DSM 4.1
Expand