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Chapter
4
Chapter 4: Manage Storage Space
Before sharing Synology DiskStation services with your users, you need to set up storage spaces first. This
chapter explains how to use Storage Manager to set up storage space (including volumes, Disk Groups, iSCSI
Targets, iSCSI LUNs), access external disks connected to DiskStation, and check hard drive's status.
What is Volume and Disk Group?
With the hard drives installed on your DiskStation, you can create volumes for storing and sharing your files.
Note: For more information about setting up file sharing on your DiskStation, see "Chapter 7: Set Up File Sharing" on
Page 67.
Volume Creation Methods
For Synology DiskStation with 2 or more bays, you can create a volume with the following methods:
Combine several hard disks into a volume: This method allows you to create a volume with data protection.
See "Create a Volume Using the Quick Mode" on Page 45 and "Create a Volume by Combining Several Hard
Disks" on Page 46 for more information.
Combine several hard disks into a Disk Group, and then create multiple volumes on the Disk Group: This
method not only allows you to create a volume with data protection, but you can also specify volume capacity
according to your needs. See "Create a Volume by Allocating Partial Space on a Disk Group" on Page 46 and
"Create a Disk Group" on Page 47 for more information.
Synology DiskStation Supported RAID Types
For Synology DiskStation with 1 bay, you can create a Basic volume. For Synology DiskStation with 2 or more
bays, you can choose between several RAID types during volume or Disk Group creation. Some of the RAID
types can provide data protection, which means data integrity is protected when one or two of the hard drives fail.
RAID Type HDD #
Allowed
Failed HDD #
Description Capacity
SHR
1
1
0
Synology Hybrid RAID (SHR) can optimize the
storage capacity when combining hard drives with
different sizes. If a SHR storage space is
composed of two or three hard drives, data
integrity is protected when one of the hard drives
fail. If a SHR storage space is composed of four or
more hard drives, data integrity is protected when
one or two of the hard drives fail.
1 x (HDD size)
2 - 3
1
Optimized by the
system
≧ 4
1 - 2
Basic 1 0
A Basic volume is created with one hard drive as
an independent unit. When creating a Basic
volume, you can select only one hard drive at a
time.
1 x (HDD size)
JBOD
≧2
0
JBOD is a collection of hard drives.
Sum of all HDD
sizes
RAID 0
≧2
0
Combining multiple disks to build a storage space,
RAID 0 offers Striping, a process of dividing data
into blocks and spreading the data blocks across
several hard drives, but without safety measures.
(HDD #) x
(Smallest HDD
size)
---------
1
RAID types except for Basic are supported on specific models only. See "Appendix A: Synology DiskStation Specifications" on
Page 219 for more information.