Synology DS920 Synology High Availability SHA User Guide for DSM 7.1 - Page 47

Memory expansion, Expand the storage capacity with Synology expansion units, Before you start

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Chapter 5: Maintain your High-availability Cluster Expand the storage capacity with Synology expansion units Synology expansion units are designed for pairing with specific expansion-ready NAS products to increase their internal volume or form independent volumes for backup or additional storage. When you use two expansion-ready NAS in a high-availability cluster, you will be able to expand its storage capacity with expansion units. Refer to this article to see if your servers are compatible with Synology expansion units. This section provides steps on pairing expansion units with your high-availability cluster. To do this, you must be have two identical expansion units for both the active and passive servers. For example, we will use two DS1621+ (active and passive servers) and two DX517 (expansion units). 1. Install your drives on the two DX517 models. The drive capacities, number of drives, and the slot positions must be identical on each device. 2. Plug both DX517 devices into power outlets. 3. Connect the Synology eSATA expansion cables to the expansion ports of the DX517 and DS1621+ devices. We strongly recommend using Synology expansion cables. We do not recommend using other expansion cables. 4. Once the connections are made, the DX517 devices will turn on automatically whenever their connected NAS powers on. Do not remove the expansion cable while the host device is powered on. Doing this may result in data loss. 5. Sign in to your high-availability cluster and go to Storage Manager > Overview to see if the expansion unit has been successfully connected. 6. You can now do the following: • Create a storage pool on the expansion units. Refer to the respective articles for DSM 7.x and DSM 6.2 for instructions. • Create a volume. Refer to the respective articles for DSM 7.x and DSM 6.2 for instructions. 5.5 Memory expansion Overall Synology server performance, such as data transmission speed and system response when multi-tasking, can be enhanced by expanding the memory capacity. Refer to this article for more information on Synology NAS memory expansion. This section briefly introduces two methods that you can use to expand the memory of your high-availability cluster. Before you start • Make sure that the memory capacity of the two servers is exactly the same to ensure that services can be properly transferred and to maintain consistent system performance. • Go to the Download Center and download the Hardware Installation Guide for your Synology NAS. 45

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45
Chapter 5: Maintain your High-availability Cluster
Expand the storage capacity with Synology expansion units
Synology expansion units are designed for pairing with specific expansion-ready NAS products
to increase their internal volume or form independent volumes for backup or additional
storage. When you use two expansion-ready NAS in a high-availability cluster, you will be able
to expand its storage capacity with expansion units. Refer to
this article
to see if your servers
are compatible with Synology expansion units.
This section provides steps on pairing expansion units with your high-availability cluster. To do
this, you must be have two identical expansion units for both the active and passive servers.
For example, we will use two DS1621+ (active and passive servers) and two DX517 (expansion
units).
1. Install your drives on the two DX517 models. The drive capacities, number of drives, and
the slot positions must be identical on each device.
2. Plug both DX517 devices into power outlets.
3. Connect the Synology eSATA expansion cables to the expansion ports of the DX517 and
DS1621+ devices. We strongly recommend using Synology expansion cables. We do not
recommend using other expansion cables.
4. Once the connections are made, the DX517 devices will turn on automatically whenever
their connected NAS powers on. Do not remove the expansion cable while the host device
is powered on. Doing this may result in data loss.
5. Sign in to your high-availability cluster and go to
Storage Manager
>
Overview
to see if the
expansion unit has been successfully connected.
6. You can now do the following:
• Create a storage pool on the expansion units. Refer to the respective articles for
DSM 7.x
and
DSM 6.2
for instructions.
• Create a volume. Refer to the respective articles for
DSM 7.x
and
DSM 6.2
for
instructions.
5.5 Memory expansion
Overall Synology server performance, such as data transmission speed and system response
when multi-tasking, can be enhanced by expanding the memory capacity. Refer to
this article
for more information on Synology NAS memory expansion. This section briefly introduces two
methods that you can use to expand the memory of your high-availability cluster.
Before you start
• Make sure that the memory capacity of the two servers is exactly the same to ensure that
services can be properly transferred and to maintain consistent system performance.
• Go to the
Download Center
and download the
Hardware Installation Guide
for your
Synology NAS.