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Hot Spare
Hot Spare disks are standby hard disks that can repair a degraded RAID Group by automatically replacing a
failed disk. Hot spare disks need not be assigned to a specific RAID Group, but may be globally assigned to
repair any RAID Group within your Synology NAS. Before assigning hot spare disks, please see the following
requirements:
The RAID type of the volume/Disk Group/iSCSI LUN must be one with data protection (i.e. RAID 1, RAID 5,
RAID 6, RAID 10).
The hot spare disk size must be equal to or larger than the size of the smallest disk in the volume/Disk
Group/iSCSI LUN.
Manage Hot Spares
You can assign, remove, or manage Hot Spare disks by going to
DSM Help
for information regarding Hot Spare management.
Storage Overview
Storage Overview shows the status of installed hard disks, cable connections, and hardware status lights. You
can view Storage Overview by going to
detailed explanation of this section.
SSD Cache
SSD cache drives can be installed and mounted in a RAID 0 (read-only) or RAID 1 (read-write) configuration to
boost the read/write speed of a volume, including iSCSI LUN (Regular Files) on a volume, or iSCSI LUN (Block-
Level) on your Synology server. You can now create a read-only cache with one SSD, as well as mount, check
SSD compatibility, and view related information by going to
Please refer to your Synology server Quick Installation Guide for information regarding SSD installation.
Additionally, refer to
DSM Help
Manage External Disks
External USB or eSATA disks can be attached to the USB or eSATA port of your Synology RackStation for
backup or file sharing purposes.
Go to
Control Panel
>
External Devices
Devices
tab provides options to view device information, change formats, or eject the device. The
provides options to setup USB or network printers. For more detailed instructions, please see
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1
eSATA is supported on specific models only. Visit
37 Chapter 6: Manage Storage Space with RAID Groups10F
Storage Manager
>
Storage Manager
for information regarding SSD management.
1
to manage attached external disks or setup printers. The
www.synology.com
Synology NAS User's Guide
Storage Manager
>
Hot
Storage
Overview. Please refer to
>
SSD
Cache.
for more information.
Based on DSM 6.1
Spare. Please refer to
DSM Help
for a
External
Printer
tab
DSM
Help.
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