User`s guide

Synology DiskStation User's Guide
Based on DSM 4.0
32 Chapter 4: Manage Storage Space
3 Enter a number in the Size (GB) field, or click Max to automatically fill in the number of the available size on
the Disk Group.
Note: The number must be larger than the original volume capacity.
4 Click OK.
Expand a Volume or Disk Group by Replacing with Larger Disks
When the internal HDD storage runs out of space, you can follow the steps below to replace a larger HDD
without losing the original data.
For one-bay models:
1 Turn off the Synology DiskStation.
2 Replace the internal hard drive with a larger one.
3 Turn on the Synology DiskStation.
4 Reinstall the system. See "Reinstall Synology DiskStation" on Page 159 for more information.
5 Connect the replaced hard drive to the USB or eSATA port.
6 Copy the data from the replaced hard drive to the new hard drive.
7 Remove the replaced hard drive.
For Basic or RAID 0 on models with two or more bays:
1 Back up all data stored on the Synology DiskStation.
2 Turn off the Synology DiskStation.
3 Replace the internal hard drives with larger ones.
4 Turn on the Synology DiskStation
5 Reinstall the system. See "Reinstall Synology DiskStation" on Page 159 for more information.
6 Copy the backup data to the new volume or Disk Group.
For RAID 1 and RAID 5, RAID 5+Spare, and RAID 6:
1 Turn off the Synology DiskStation (skip this step for models that support disk hot swapping).
2 Replace the first internal hard drive with a larger hard drive.
3 Turn on the Synology DiskStation and repair the volume or Disk Group. See "Repair a Volume" on Page 30 for
more information.
4 Repeat step 1 to 3 until all internal hard drives are replaced with larger hard drives.
5 The system will expand the volume or Disk Group automatically.
Note:
 Before replacing the spare disk of a RAID 5+Spare volume or Disk Group, you need to click Manage, click
Change RAID type, and then follow the wizard to change the volume or Disk Group.
 When the system is removing a volume or Disk Group, all enabled services on other volumes will be temporarily
stopped. When the volume or Disk Group is removed successfully, those services will be resumed.
 You can only remove the hard drive when the volume or Disk Group is in Normal status; otherwise it will cause
data loss. If the volume or Disk Group is in Degraded status, please repair the volume or Disk Group before
replacing it.
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 Expand the volume by adding hard disks (for volume expansion) and Expand
the RAID by adding hard disks (for Disk Group expansion).