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Synology NAS User's Guide
Based on DSM 6.1
26 Chapter 5: Manage Storage Space
Quick or Custom Volumes
When creating a new volume, the following options are available:
Method
Features
Quick
Creates an SHR (Synology Hybrid RAID) volume.
Automatically optimizes volume capacity and performance based on member hard disks.
Recommended for saving time and simplifying storage management.
Custom
Supports different RAID types.
Supports creating single or multiple volumes on Disk Groups.
Provides options to allocate specific amounts of capacity for each volume (only when creating
multiple volumes on RAID).
Recommended for users who want to precisely control storage management on your Synology
NAS.
Single or Multiple Volumes on RAID
When creating a custom volume, the following options are available:
Option
Feature
Single Volume on RAID
Uses all of the available capacity of the selected disks to create a single volume.
Provides better speed and performance.
Supports different RAID types.
Multiple Volumes on
RAID
Allows you to create multiple volumes on a Disk Group.
Supports allocating specific amounts of capacity to each volume.
Provides greater storage management flexibility.
Supports different RAID types.
RAID Types
Depending on your model and number of installed hard disks, the below RAID types can be implemented when
creating custom volumes or Disk Groups.
RAID Type HDD #
Allowed
Failed HDD #
Description Capacity
SHR
1
1 0
A Synology Hybrid RAID volume optimizes
storage capacity and performance when
combining hard drives of different sizes. SHR
volumes consisting of two or three hard disks
provide 1-disk fault tolerance, while SHR
volumes consisting of four or more hard disks
can provide 1- or 2-disk fault tolerance.
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
≧
1 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.
Sum of all HDD
sizes
---------
1
RAID types except for Basic are supported on specific models only. Visit www.synology.com for more information.
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