User's Manual

Synology DiskStation User's Guide
Based on DSM 3.0
41 Chapter 4: Manage Storage Space
Expand a Volume
You can expand the storage capacity by connecting external hard drives, replacing the internal hard drive with a
larger one, or adding a hard drive to the volume.
Expand by Replacing with Larger Disks
When the internal HDD storage runs out of space, the system administrator 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 171 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 volume 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 171 for more information.
6 Copy the backup data to the new volume.
For RAID 1 and RAID 5, RAID 5+Spare, and RAID 6 volumes:
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. See "Repair a Volume" on Page 39 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 automatically.
Note:
 Before replacing the spare disk of a RAID 5+Spare volume, you need to click Manage, click Change RAID type,
and then follow the wizard to change the volume.
 When the system is removing a volume, all enabled services on other volumes will be temporarily stopped. When
the volume is removed successfully, those services will be resumed.
 You can only remove the hard drive when the volume is in Normal status; otherwise it will cause data loss. If the
volume is in Degraded status, please repair the volume before replacing it.
Expand by Adding Disks
If you have empty hard drive trays in your Synology DiskStation, you can expand JBOD, RAID 5, RAID 5+Spare
or RAID 6 volumes by adding disks.
To expand a volume by adding disks:
1 Install a new hard drive for your Synology DiskStation.
2 Select the volume you want to expand.
3 Click Manage.
4 Select the hard drive in the Choose disks section.
5 Follow the wizard to complete the setup.