User Manual

Synology NAS User's Guide
Based on DSM 6.1
35 Chapter 6: Manage Storage Space with RAID Groups10F
Manage Volumes
Volumes are basic storage spaces on which you can create shared folders, iSCSI LUNs (regular file), save data,
or install packages. Before creating a volume on your Synology NAS, please create at least one RAID Group.
Create Volumes
To create a volume, please go to Storage Manager > Volume, and click Create. For more detailed instructions,
please see DSM Help.
Volume Types
Depending on the underlying RAID Group type, you may create the following types of volumes:
 Volume on RAID Group for Single Volume or iSCSI LUN (Block-Level)
 Allocates all storage capacity on a RAID Group to a single volume. Provides better performance but less
management flexibility.
 Allows creation of multiple iSCSI LUNs (Regular File) on volumes.
 Volume on RAID Group for Multiple Volumes or iSCSI LUNs (Block-Level)
 Allocates a designated portion of the storage capacity on a RAID Group to create a volume. Provides better
management flexibility, allowing you to expand volume size or create additional volumes as needed.
 Allows creation of multiple iSCSI LUNs (Regular File) on volumes.
Edit Volumes
If you want to change the description of a volume or edit the amount of allocated storage capacity, please go to
Storage Manager > Volume, select the desired volume, and click Edit.
Repair Degraded Volumes
If a volume status reads Degraded, please go to Storage Manager > RAID Group, and follow the instructions
displayed under the RAID Group status. Please refer to DSM Help for more information.
SSD TRIM
If a volume consists entirely of SSDs (Solid State Drives), we recommend enabling SSD TRIM. This feature
optimizes the read and write performance of volumes created on SSDs, increasing efficiency as well as
extending the lifetime of your SSDs.
Before trying to set up SSD TRIM, please see DSM Help for detailed instructions and more limitations.
Note:
 SSD TRIM is only available on certain Synology NAS models and RAID types.
 Some SSD models are not able to perform SSD TRIM on RAID 5 and RAID 6 volumes. Please refer to the
compatibility list at www.synology.com.