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Acronis Cyber
Infrastructure 3.0
Appliance Quick Start Guide
November 20, 2019
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Copyright Statement
Copyright ©Acronis International GmbH, 2002-2019. All rights reserved.
”Acronis” and ”Acronis Secure Zone” are registered trademarks of Acronis International GmbH.
”Acronis Compute with Confidence”, ”Acronis Startup Recovery Manager”, ”Acronis Instant Restore”, and the Acronis logo are trademarks of Acronis
International GmbH.
Linux is a registered trademark of Linus Torvalds.
VMware and VMware Ready are trademarks and/or registered trademarks of VMware, Inc. in the United States and/or other jurisdictions.
Windows and MS-DOS are registered trademarks of Microsoft Corporation.
All other trademarks and copyrights referred to are the property of their respective owners.
Distribution of substantively modified versions of this document is prohibited without the explicit permission of the copyright holder.
Distribution of this work or derivative work in any standard (paper) book form for commercial purposes is prohibited unless prior permission is
obtained from the copyright holder.
DOCUMENTATION IS PROVIDED ”AS IS” AND ALL EXPRESS OR IMPLIED CONDITIONS, REPRESENTATIONS AND WARRANTIES, INCLUDING ANY IMPLIED
WARRANTY OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE OR NON-INFRINGEMENT, ARE DISCLAIMED, EXCEPT TO THE EXTENT THAT
SUCH DISCLAIMERS ARE HELD TO BE LEGALLY INVALID.
Third party code may be provided with the Software and/or Service. The license terms for such third-parties are detailed in the license.txt file located in
the root installation directory. You can always find the latest up-to-date list of the third party code and the associated license terms used with the
Software and/or Service at http://kb.acronis.com/content/7696.
Acronis patented technologies
Technologies, used in this product, are covered and protected by one or more U.S. Patent Numbers: 7,047,380; 7,246,211; 7,275,139; 7,281,104;
7,318,135; 7,353,355; 7,366,859; 7,383,327; 7,475,282; 7,603,533; 7,636,824; 7,650,473; 7,721,138; 7,779,221; 7,831,789; 7,836,053; 7,886,120; 7,895,403;
7,934,064; 7,937,612; 7,941,510; 7,949,635; 7,953,948; 7,979,690; 8,005,797; 8,051,044; 8,069,320; 8,073,815; 8,074,035; 8,074,276; 8,145,607; 8,180,984;
8,225,133; 8,261,035; 8,296,264; 8,312,259; 8,347,137; 8,484,427; 8,645,748; 8,732,121; 8,850,060; 8,856,927; 8,996,830; 9,213,697; 9,400,886; 9,424,678;
9,436,558; 9,471,441; 9,501,234; and patent pending applications.
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Contents
1. About the Appliance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
1.1 Appliance Exterior . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
2. Safety Instructions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
3. Installing the Appliance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
3.1 Unpacking the Appliance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
3.2 Mounting the Appliance into Rack . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
3.3 Connecting Cables to the Appliance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
3.4 Configuring the Appliance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
4. Managing Updates . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
5. Managing Licenses . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
5.1 Installing License Keys . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
5.2 Installing SPLA Licenses . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
6. Getting Technical Support . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
7. Appendix: Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
7.1 Technical Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
7.1.1 Power Supply Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
7.2 Environmental Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
7.2.1 Air Quality Requirements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
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CHAPTER 1
About the Appliance
The appliance comprises five nodes in a 19-inch 3U rackmount server chassis. The appliance deploys into a
universal and easy-to-use software-defined infrastructure solution that combines virtualization and storage.
It allows you to create and manage virtual machines and offers object, block, and file storage, including a
local repository for cloud backups.
The appliance comes in several models that vary by storage capacity:
Model Raw storage, TB Usable storage*, TB
Capacity Performance
SDI-5060 60 31 18
SDI-5120 120 62 36
SDI-5150 150 77 45
SDI-5180 180 93 54
* With the recommended redundancy scheme. Erasure coding 3+2 is recommended for capacity;
replication=3 is recommended for performance.
1.1 Appliance Exterior
The appliance consists of five identical nodes. On the front of the appliance, under the front bezel are the
power/reset buttons, a power LED of each node as well as the main power switch. The front panel also
provides access to disks of each node: three per node, ordered left to right, i.e. the leftmost three disks are
of node #1, the next three are of node #2, etc.
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Chapter 1. About the Appliance
1 2 3 1 2 3 1 2 3 1 2 3 1 2 3
3
4
5
1
2
BMC
IPMI
1/10 GbE
10 GbE SFP+
VGAUSB
VGAUSB
VGAUSB
VGAUSB
VGAUSB
1 2 3 4
IPMI
1/10 GbE
10 GbE SFP+
1 2 3 4
IPMI
1/10 GbE
1/10 GbE SFP+
1 2 3 4
IPMI
1/10 GbE
1/10 GbE SFP+
1 2 3 4
IPMI
1/10 GbE
10 GbE SFP+
1 2 3 4
3
IPMI
1/10 GbE
10 GbE SFP+
VGAUSB
1 2 3 4
On the back of the appliance are two power sockets and a number of connectivity options.
Each node has its own network, IPMI, USB, and VGA ports.
The IPMI, USB, and VGA ports are only needed for advanced diagnostics. IPMI allows accessing the nodes
over the network for out-of-band management via a remote console. The default IPMI password to access
the management node via SSH is Acronis!Infra%30 (it changes to a user-specified password during
deployment). The USB and VGA ports allow you to connect a keyboard and a monitor to a node if the
network is unavailable.
Day-to-day management of the appliance is done over the network through the admin panel, as described
later in the guide.
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CHAPTER 2
Safety Instructions
Warning: The appliance may only be repaired by a certified service technician. You may only perform
troubleshooting as authorized by the support team. Damage due to unauthorized repairs is not covered
by the warranty.
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CHAPTER 3
Installing the Appliance
Before installing the appliance, make sure you have the following:
• 3U of server rack space in a standard 19-inch cabinet
• at least five free 1/10 GbE ports in a network switch (10 GbE recommended)
• at least five RJ45-to-RJ45 patch cables to connect the appliance to the switch
• two power sockets
If you want to set up network bonding, you will additionally need (a) five free 1/10 GbE ports in a network
switch (10 GbE recommended) and (b) five RJ45-to-RJ45 patch cables to connect the appliance to the switch.
If you want to have access to the nodes from a remote console for out-of-band management, you will
additionally need (a) six free 1 GbE ports in a network switch and (b) six RJ45-to-RJ45 patch cables to connect
the appliance to the switch.
To install the appliance, perform the following steps:
1. Unpack the appliance.
2. Mount the appliance into rack.
3. Connect cables to the appliance.
4. Configure the appliance using the wizard.
5. Log in to the admin panel and install a license.
6. Enable high availability.
7. Set up the desired workloads in the admin panel.
Steps one through six are described in the following sections. For more information about step seven, refer
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Chapter 3. Installing the Appliance
Press the trigger
down to release
Pull the inner rail out
to the Administrator’s Guide.
3.1 Unpacking the Appliance
Inspect the packaging contents for damage before mounting the appliance and connecting power.
Before continuing, make sure the following items are present in the packaging: the appliance chassis,
mounting rails, two power cables, this quick start guide.
3.2 Mounting the Appliance into Rack
The appliance comes with a set of server rails. Follow the steps further to install the rail and mount the
appliance into the rack.
1. Separate inner and outer rails.
Separate the inner rail from the outer rail by sliding the inner rail forward until the locking tab is visible,
as per the illustration below. Depress the tab and separate the inner rail from the outer rail by sliding
the two apart.
2. Attach the inner rail to the appliance.
Align the rectangular cutouts on the inner rail to the pre-formed bayonets on the side of chassis. Secure
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Chapter 3. Installing the Appliance
08.4
2.0
6.0
H-315
Release safety lock before mounting
Push the safety lock forward to secure
the inner rail with a screw from the standard screw kit after all the bayonets go through the cutouts and
properly engage.
3. Install the outer rail into the rack.
When selecting the location, note that the rails are in the middle of the appliance. Make sure that you
install the outer rails with 1U clearance above and below.
Make sure that the safety lock is unlocked before mounting the brackets.
Insert the locating pins into the upper and lower square holes on the rail from the back of rail. Push the
safety lock forward to secure the bracket.
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Chapter 3. Installing the Appliance
Uninstall the bracket
Retainer
4. Mount the chassis into the cabinet.
Important: Two people are required to perform this step.
Insert the inner rail into the outer rail as shown on the figure.
Important: Make sure that the ball retainer is fully open before installing the chassis. Otherwise, you
risk damaging the chassis!
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Chapter 3. Installing the Appliance
3.3 Connecting Cables to the Appliance
Note: For more details on configuring the network infrastructure, see the Acronis Cyber Infrastructure 3.0
Administrator’s Guide.
To prepare the appliance for configuration, do the following:
1. Connect the appliance to the electrical outlets using the supplied power cables.
2. Connect network interfaces #1 of all nodes (1 on the diagram) to a switch (2 on the diagram) with access
to a dedicated subnet for your software-defined infrastructure. The nodes have preconfigured IP
addresses: 10.20.20.11 to 10.20.20.15. Connect the admin laptop (3 on the diagram) to the same switch.
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Chapter 3. Installing the Appliance
3
4
5
1
2
BMC
IPMI
1/10 GbE
10 GbE SFP+
VGAUSB
VGAUSB
VGAUSB
VGAUSB
VGAUSB
1 2 3 4
IPMI
1/10 GbE
10 GbE SFP+
1 2 3 4
IPMI
1/10 GbE
10 GbE SFP+
1 2 3 4
IPMI
1/10 GbE
10 GbE SFP+
1 2 3 4
IPMI
1/10 GbE
10 GbE SFP+
1 2 3 4
1
3
2
3
4
5
1
2
BMC
IPMI
1/10 GbE
10 GbE SFP+
VGAUSB
VGAUSB
VGAUSB
VGAUSB
VGAUSB
1 2 3 4
IPMI
1/10 GbE
10 GbE SFP+
1 2 3 4
IPMI
1/10 GbE
10 GbE SFP+
1 2 3 4
IPMI
1/10 GbE
10 GbE SFP+
1 2 3 4
IPMI
1/10 GbE
10 GbE SFP+
1 2 3 4
1
2
3
3. (Optional) Connect the out-of-band management network interfaces of each node and the chassis (1 on
the diagram) to a switch with access to the IPMI subnet for your appliance (2 on the diagram). The nodes
have preconfigured IPMI IP addresses: 10.20.30.11 to 10.20.30.15. The chassis has the preconfigured
IPMI IP address 10.20.30.10. Connect the admin laptop (3 on the diagram) to the same switch.
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Chapter 3. Installing the Appliance
3.4 Configuring the Appliance
Perform the following steps to configure the appliance:
1. Turn on the power: (a) press and hold down the main switch for five seconds, (b) press the power
buttons of each node.
2. Connect an admin laptop (from which you will configure the appliance) to the network. Assign a static IP
address to it from the same subnet that nodes are in, e.g., 10.20.20.100. As mentioned before, the
nodes have preconfigured IP addresses: 10.20.20.11 to 10.20.20.15.
3. On this computer, open a web browser and visit the default primary node IP address 10.20.20.11. The
wizard has been tested to work in the latest Firefox, Chrome, and Safari web browsers.
4. Once the configuration wizard is displayed, click Configure.
5. Review and accept the license agreement then click Next.
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Chapter 3. Installing the Appliance
6. On the next step, enter the following:
• New host names for all nodes (or leave the default names). You can rename the nodes to fit your
organization’s naming policies or make them relevant to your organization.
• New static IP addresses for network interfaces 1 on all nodes. If you leave the fields empty, the
default addresses 10.20.20.11 to 10.20.20.15 will be used.
• Virtual IP address at which you will access the highly available admin panel. You can read more
about high availability in the Administrator’s Guide.
• Network mask. Consult your network administrator for the proper network/subnet mask.
• At least one local DNS server.
• Gateway. Consult your network administrator for the proper gateway address.
• Domain name (optional). If this system will be visible from the Internet or if you wish to bind it to
your organization’s domain, provide the domain prefix and suffix.
• Time zone and time. Since nodes communicate with each other, they must be on the same time
zone and have the same time in order to ensure proper synchronization. Click Change time
settings to set the correct time zone and time.
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Important: Entered values cannot be changed later.
Chapter 3. Installing the Appliance
If one or more nodes are not reachable from the primary node, they will be marked as offline. In this
case, make sure the nodes are powered on and connected to the correct network. Deployment will be
blocked until all nodes are green (accessible and configurable by the primary node).
Note: You will be able to configure bonds and VLANs later in the admin panel.
Click Next.
7. On the next step, enter the cluster name (you cannot change it later) and cluster administrator
password.
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Chapter 3. Installing the Appliance
Click Submit. Configuration will begin, as indicated on the progress bar.
8. Wait until the progress bar reaches the end and change the IP address of the admin laptop to a free
one from which you can access the appliance.
9. Once configuration is completed, you will see a link to the cluster admin panel. Log in with the
username admin and the specified password. The admin panel has been tested to work at resolutions
1280x720 and higher in the latest Firefox, Chrome, and Safari web browsers.
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Chapter 3. Installing the Appliance
10. Proceed to SETTINGS > Licenses and upgrade the default trial license either by a key or SPLA (for more
details, see Managing Licenses (page 17)). If you do not have a license, contact your sales representative.
11. If you need to make additional changes to network configuration, e.g., create bonds and VLANs,
connect cables to the network interface 2 and SFP slots and follow the instructions in the Acronis Cyber
Infrastructure 3.0 Administrator’s Guide.
After deployment, update the product to the latest version (see Managing Updates (page 15)). Finally,
configure the cluster for the desired workload as described in the Acronis Cyber Infrastructure 3.0
Administrator’s Guide.
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CHAPTER 4
Managing Updates
Take note of the following before you start updating nodes:
• To check for and download updates, the cluster must be healthy and each node in the infrastructure
must be able to open outgoing Internet connections. This means, in particular, that cluster DNS must
be configured and point to a DNS able to resolve external host names. For more details, see the Acronis
Cyber Infrastructure 3.0 Administrator’s Guide.
• Unassigned nodes cannot be updated.
• Updates are applied to one storage cluster node at a time.
• If a reboot is required:
•
Highly available storage services will continue working.
•
Virtual machines in the compute cluster will be suspended.
•
If the management node HA cluster is configured, the admin panel will remain accessible, although
you may expect a lag when it moves to an online node from the one being rebooted.
• Disable any third-party repositories before updating.
To update the storage cluster from the admin panel, do the following:
1. Open the SETTINGS > Updates screen and click CHECK FOR UPDATES. The script will run yum update on
each node. If updates are available for a node, that node’s status will change to Update available.
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2. To apply all available updates, click UPDATE NOW.
Chapter 4. Managing Updates
To update the kernel with ReadyKernel, consult the Acronis Cyber Infrastructure 3.0 Administrator’s Command
Line Guide.
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CHAPTER 5
Managing Licenses
The Acronis Cyber Infrastructure appliance is licensed for two types of deployments:
• Hybrid cloud. Comes with a 3-year hardware warranty and requires a subscription for Acronis Backup
Cloud. After 3 years, the hardware warranty needs to be renewed for another 1 or 3 years.
For this deployment type, you will need to install a SPLA license as described in Installing SPLA Licenses
(page 20).
• Private cloud. Comes with a 3-year license for Acronis Cyber Infrastructure and hardware warranty.
After 3 years, both the license and warranty need to be renewed for another 1 or 3 years.
For this deployment type, you will need to install a license key as described in Installing License Keys
(page 18).
For more details on licensing options, see the Knowledge Base article #62324.
Acronis Cyber Infrastructure supports the following licensing models for production environments:
• License key. Implementing the provisioning model, keys are time-limited (subscription) or perpetual
and grant a certain storage capacity. If a commercial license is already installed, a key augments its
expiration date or storage limit.
• Services provider license agreement (SPLA). SPLA implements the pay-as-you-go model: it grants
unlimited storage capacity and customers are charged for the actual usage of these resources. With
SPLA, Acronis Cyber Infrastructure automatically sends reports to Acronis Cyber Cloud once every four
hours. If no reports have been received for two weeks, the license expires. For reports to reach
destination, the cluster must be able to access the Acronis datacenter that has been used to enable
SPLA. Make sure that TCP port 443 is open.
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Chapter 5. Managing Licenses
Note: SPLA license is valid for Cloud Partners. If SPLA is enabled, you can connect Backup Gateway
only to Acronis Backup Cloud and not to Acronis Backup 12.5 or Acronis Backup Advanced 12.5. To
connect ABGW to these products, you will need to use license keys. Furthermore, Acronis Backup
Gateway usage is not counted in SPLA in Acronis Cyber Infrastructure. SPLA only counts universal usage
that is not related to backup. Backup usage is shown in the Acronis Backup Cloud section of Acronis
Cyber Cloud.
You can switch the licensing model at any time:
• Switching from a license key to SPLA terminates the key even if it has not yet expired. Terminated keys
cannot be used anymore.
• Switching from SPLA to a license key changes the licensing model to subscription or perpetual. After
doing so, ask your service provider to terminate your SPLA by either disabling the Storage application
for your account or deleting the account.
Important: If a license expires, all write operations to the storage cluster stop until a valid license is installed.
5.1 Installing License Keys
To install a license key, do the following:
1. If you are switching from SPLA, ask your service provider to terminate the agreement by either disabling
the Acronis Cyber Infrastructure application for your account or deleting the account.
2. On the SETTINGS > Licenses screen, click Upgrade and Register key.
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Chapter 5. Managing Licenses
3. In the Register license key window, paste the license key and click REGISTER.
4. Back on the Licenses screen, click Activate if you are activating from a trial or choose one of the
following:
• Upgrade, to add storage capacity to the active license.
• Prolong, to prolong the soon-to-be-expired license.
And click Activate.
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Chapter 5. Managing Licenses
The expiration date or storage capacity will change according to what the key grants.
5.2 Installing SPLA Licenses
To install a SPLA license, do the following:
1. On the SETTINGS > Licenses screen, click Upgrade and Use SPLA.
2. In the Use SPLA window, select a region from the drop-down list and click Activate. You will
be redirected to a login page of Acronis Cyber Cloud.
Note: For more information on datacenters, see https://kb.acronis.com/servicesbydc.
3. Log in to Acronis Cyber Cloud.
4. In the Register cluster window, accept the license agreement.
5. In the registration confirmation window, click Done.
The registered cluster will show up in Acronis Cyber Cloud. You will be able to monitor its resource
usage and download reports.
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CHAPTER 6
Getting Technical Support
If you need technical support, please contact Acronis as follows:
1. Visit the contact support page at https://www.acronis.com/en-us/support/contact-us/.
2. Log in to your account.
3. Select the product you are using.
4. Choose how you would like to contact the support team: via e-mail or phone.
Please be ready to provide support engineers with remote access to your appliance, per your Service Level
Agreement. To maintain security, it is recommended to whitelist only specific IP addresses communicated to
you by support engineers and block external access from any other addresses. For more information, see
the Knowledge Base at https://kb.acronis.com/sdiremote.
You can also use the following self-service resources:
• Knowledge base, https://kb.acronis.com/, a repository of frequently asked questions, step-by-step
instructions, and articles about known issues. Visit the following knowledge base sections for
information on this appliance and related software solutions:
•
Appliance, https://kb.acronis.com/acronis-appliance
•
Acronis Cyber Infrastructure, https://kb.acronis.com/acronis-cyber-infrastructure
•
Acronis Backup Cloud, https://kb.acronis.com/acronis-backup-cloud
•
Acronis Backup 12.5, https://kb.acronis.com/acronis-backup-12-5
• User documentation, guides describing how to use this appliance as well as Acronis software,
https://www.acronis.com/support/documentation.
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For information on appliance warranty, see the Support section at
https://www.acronis.com/en-us/support/hwappliancesupport.
Chapter 6. Getting Technical Support
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CHAPTER 7
Appendix: Specifications
This chapter lists technical and environmental specifications of the appliance.
7.1 Technical Specifications
The following table lists appliance hardware parts.
Chassis 3U, 435x130x600 mm (WxHxD), 34.5 kg
CPU Intel Atom C3958 @ 2.00GHz, 16 cores, 31W TDP, VT-d support, w/o
Hyper-Threading
RAM 32GB (up to 256GB), Samsung, 2x16GB DDR4-2400 ECC
OS drive 1x Intel S4600 240GB 2.5-inch SSD
Cache drive 1x Intel S4600 240GB 2.5-inch SSD
Storage drives 3x Seagate 4/8/10/12TB enterprise SATA HDD per node, 15x in total
Network 2x 1/10GbE RJ45, 2x 10GbE SFP+
Power supply 750W 1+1, current share and cold redundancy depending on power
loads (also see table below)
IO ports Rear: 2x USB 2.0, 1x VGA, 2x 1/10GbE RJ45, 2x 10GbE SFP+, 1x GbE
RJ45 management
Software Acronis Cyber Infrastructure 3.0
Data protection Replication and erasure coding via storage policies
Continued on next page
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Table 7.1.1 – continued from previous page
Redundancy Hot-swappable data disk drives
2x hot-swappable power supplies
No single point of failure
Non-disruptive online software upgrades
Monitoring, management CLI, GUI, API, IPMI
7.1.1 Power Supply Specifications
The following table lists appliance power supply specifications.
Voltage, frequency 100-240 V, 50/60 Hz
Power consumption, W 750
Heat dissipation max (BTU/hr) 2,300
Chapter 7. Appendix: Specifications
Max inrush, A 40
Input current AC input Max. current
100–127 Vac, 8.8 A 200–240 Vac, 4.3 A
Power supply efficiency
(Platinum class)
Input power factor correction* Output power 20% load 50% load 100% load
* Tested at 230 Vac, 50 Hz and 115 Vac, 60 Hz. The input power factor is greater than values in the table at
power supply’s rated output and meets Energy Star® requirements.
10% load 20% load 50% load 100% load
80% 90% 94% 91%
Power factor >0.80 >0.95 >0.95
7.2 Environmental Specifications
Appliance environmental specifications are listed in the following tables.
Store temperature -40°C to 85°C (-40°F to 185°F)
Store temperature gradient 20°C (68°F) per hour
Operating temperature 10°C to 35°C (50°F to -95°F)
Operating temperature gradient 20°C (68°F) per hour
Continued on next page
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Chapter 7. Appendix: Specifications
Table 7.2.1 – continued from previous page
Relative humidity percentage range for storage 10% ~ 95% (non-condensing)
Relative humidity percentage range for operating 10% ~ 85% (non-condensing)
Vibration for storage 1.87 Grms (10-500 Hz)
Vibration for operating 0.26 Grms (5-350 Hz)
Shock for storage 65G for 2ms
Shock for operating 5G
Altitude for storage 12,000m (39,370 ft)
Altitude for operating 3,048m (10,000 ft)
7.2.1 Air Quality Requirements
The air must be free of:
• corrosive dust and/or corrosive contaminants
• conductive dust or conductive particles (such as zinc whiskers)
Airborne residual dust must have a deliquescent point* less than 60% relative humidity. (*The relative
humidity at which crystalline materials begin adsorbing large quantities of water from the atmosphere.)
Gaseous corrosion level in terms of (in Angstrom) as per ISA:
• Copper reactivity rate must be less than 300 Å/month, class G1(ANSI/ISA71.04-1985).
• Silver reactivity rate must be less than 200 Å/month (AHSRAE TC9.9).
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