Network Attached Storage


A superior performance packed in our 24-bay rackmount appliance.

Meet Helios HEN-9524-DP the enterprise Pro-NAS workhorse with dual processors that simplifies storage needs at the push of a button. The simplicity of the web interface powers you to make most configuration changes with the click of a mouse. Our NAS solutions are powered by the world’s #1 storage OS, FreeNAS.

File sharing across platforms

File sharing across platforms empowers you to connect various clients from different architectures. Clients running any enterprise operating system can connect with either SMB/CISF style Windows file shares, Network File System (Unix or Unix-like shares), and Apple File Shares. If that wasn’t enough why not also harness the power of FTP, iSCSI (block sharing) and WebDAV? Supporting various platforms is now easy, Windows, Mac OS X, and several Linux distributions can now connect with no additional software or configuration. There’s also bundled-in support for Time Machine backups for offices with clients that run Apple OS X.

Intuitive web interface

We understand our clients and their needs. We understand that simplifying complex administrative tasks is vital to streamlining workflow for system administrators. Every day-to-day administrative task can be done from the convenience of your mouse and a web browser. The step-by-step setup process further simplifies configuration. Tasks such as volume creation or setting devolved permissions for specific shares or updating your system can be done with confidence. For folks who prefer hands-on control, there’s also the option to log into the FreeBSD shell prompt. From the software design to feature selection and testing the storage OS is designed with one key goal – ease of use.

Enterprise-grade ZFS protection

Our storage OS is powered by ZFS which is designed for data integrity inside and out. RAID-Z, the software RAID that is part of ZFS offers single parity protection like RAID 5, but without the “write hole” vulnerability thanks to the copy-on-write architecture of ZFS. The additional levels RAID-Z2 and RAID-Z3 offer double and triple parity protection, respectively. A software mirror option is also available. When creating a new volume the setup wizard form updates with available parity options depending on the number of disks you have selected, thus removing the guesswork from the process. Every ZFS filesystem is also verified with checksums from top to bottom to ensure data integrity. If inconsistencies are found, parity blocks can be used to repair corrupt data. A regular scrub is turned on by default and can be rescheduled or configured from the web interface.

On-demand, enterprise-level snapshots make data loss a thing of the past

Accidents can happen, which is why and thanks to ZFS, snapshots of the entire filesystem can be made and saved at any time. As long as a snapshot exists, administrators can access files as they were when the snapshot was made. Snapshots can be made on a one-off basis or scheduled as a cron job from the web interface. At any time, the entire filesystem can be rolled back to the most recent snapshot. Older snapshots can be cloned and accessed to recover data from that version of the filesystem. From the web interface, users can see how much space a particular snapshot is occupying on the volume and delete, clone, or roll back to individual snapshots as needed.

Local and remote replication

Snapshots aren’t just local backups, in fact, they can be saved in remote locations as well. Replicating snapshots of the file system to a remote ZFS file system creates an exact duplicate. Backing up large amounts of data often can consume large bandwidth which is why ZFS snapshots can be sent incrementally, bringing down the size of each backup to just the changes that were made since the last snapshot. When disks fail or data on disk becomes inconsistent or corrupt it is straightforward to restore a remotely saved backup onto a fully functioning machine within minutes.


We understand the value of data which is why encryption is at the forefront of our product design. Entire volumes can be encrypted during initialization, providing industry-standard AES-XTS encryption which can be hardware-accelerated (when the processor has AES-NI capability). Encrypted volumes can only be read by FreeNAS systems in possession of the master key for that volume. The user can optionally create a passphrase to add extra protection for their system against loss or theft. Encryption allows for confidence when retiring and recycling hard drives because the drives no longer need to be wiped provided the master keys are obliterated.

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ZFS is designed for business
ZFS is an enterprise-ready file system and volume manager with unprecedented flexibility and an uncompromising commitment to data integrity. ZFS is a truly next-generation file system that eliminates most, if not all of the shortcomings found in legacy file systems and hardware RAID devices. Once you go ZFS, you will never want to go back.
Businesses can not afford data loss and creating snapshots ensures that your data is safe and never lost. ZFS creates a chain of trust for your data by checksumming data when it is written and verifying the checksums when it is read. It even checksums the metadata that describes the file system and allows you to periodically verify all checksums to determine if your infrequently-used data or backups are suffering silent data corruption. By taking these precautions, ZFS will never return you corrupt data from disk.
Protection and security for your critical data
The Helios range is designed keeping in mind business needs for maximum uptime. Downtime can reduce productivity and profitability and we wanted to design our NAS products keeping this in mind. The Helios range offers peace of mind to administrators in the form of all the standard RAID options
Mirrored VDEV’s (similar to RAID 1)
Striped Mirrored VDEV’s (similar to RAID 10)
RAID Z1 (one-disk parity) (similar to RAID 5)
RAID Z2 (two-disk parity) (similar to RAID 6)
RAID Z3 (third-disk parity) (similar to RAID 7)
Nested RAID Z (similar to RAID50 or RAID60)

Seamless integration with business processes
Businesses today are a multi-channel, cross-department, intra-team arrangements of staff working at peak efficiency and this arrangement shouldn’t have to change from the introduction of new hardware. The Helios range is designed to adapt to your business processes and not the other way round.
We also take the guesswork out of configuring your NAS. ZFS helps you avoid most storage planning mistakes by pooling together the blocks provided by all of your disks and allowing you to divide the available space into highly-configurable file systems. ZFS includes the permissions and quotas of traditional file systems but also includes transparent compression levels, capacity reservations, and clonable snapshots. This allows administrators to seamlessly integrate their permissions structure in line with their team structure and organized work environment.


Hardware specifications
CPU (Dual Processor) 2 x Intel Xeon E5-2630V4 (10 cores, 2.2GHz to 3.1Ghz)
Hardware encryption engine Yes
Installed memory 96GB (Expandable up to 64GB x 16 = 1024 GB)
Memory slots 16
Drive bays 24
3.5” Yes
2.5” Yes (add on bracket required)
Drives supported SAS, SSD, SATA
Physical Interfaces
USB 4 USB 2.0 ports (2 rear, 2 via headers) and 4 USB 3.0 ports (4 rear)
Expansion Port 6
1G RJ45 LAN 2 + 4 optional
10G RJ45 LAN 2
PCIe slots 3 PCI-E 3.0 x16
2 PCI-E 3.0 x8
1 PCI-E 2.0 x4 (in x8 slot)
Video Controller Optional
Physical Specifications
Size (DxWxH) 670mm x 444mm x 177mm
Weight 18 kg
System fan 3×12038 Hot-Swap
AC input power voltage 100V to 240V AC
Power frequency 50/60Hz, single phase
Redundant Power Supply 800W RPS
Operating temperature 5°C to 35°C (40°F to 95°F)
Storage temperature -20°C to 60°C (-5°F to 140°F)
Relative humidity 5% to 95% RH
Maximum operating altitude 5,000 m (16,400 ft)
Software specifications
Operating system YES (Preloaded OS)
Apple Filing Protocol (AFP) Yes
WebDAV Yes
Block (iSCSI) Yes
Email alerts Nightly alerts containing information about health of disks
CPU usage reporting Yes (NAS health reports)
Send alerts to AWS-SNS
Reports available for
Disk Yes
Memory Yes
Network Yes
Partition Yes
System Yes
Target Yes
Web UI
Built in themes Yes
Custom themes Yes
Add on features
Plugins available for Create real-time local cloud backup
Media center
BitTorrent client
Minecraft server
Data Management
Snapshots Yes
Replication Yes
Rollback Yes
Clones Yes
Encryption Yes
Mirroring Yes
Management Protocols
WebUI Yes
Telnet Yes
Kerberos Realms Yes
Kerberos Keytabs Yes
Active Directory (ADS) Yes
Virtualization Yes
Firewall  Yes
Encrypted shared folder Yes
SMB encryption Yes
FTP over SSL/TLS Yes
Rsync over SSH Yes
Login auto block Yes
Let’s Encrypt support Yes
FTP Server
Bandwidth control for TCP connections Yes
Custom FTP passive port range Yes
Anonymous FTP Yes
FTP SSL/TLS and SFTP protocol Yes
Backup tools
Windows Backup support Yes
Apple Time Machine support Yes
Support for rsync Yes
TrueOS Life Preserver Yes
Asigra Backup (Plugin) Yes
Tarsnap (Plugin) Yes
BRU Server (Plugin) Yes
Syncthing (Plugin) Yes
BackupPC (Plugin) Yes
Cloud Sync
One or two-way synchronization Yes
Amazon Drive Yes
Amazon S3-compatible storage Yes
Box Yes
Dropbox Yes
Google Cloud Storage Yes
Google Drive Yes
Microsoft OneDrive Yes
OpenStack Swift-compatible storage Yes
WebDAV servers Yes
Supports creating user accounts Yes
Supports creating user groups Yes
Supports assigning permissions to groups Yes
Supports assigning permissions to users
(User access rights)
User/Folder Quota Yes
Manageability through remote access Yes
Cloud sync
Compatible cloud services Amazon S3
Backblaze B2
Google Cloud Storage
Google Drive
Microsoft Azure Blob Storage
Microsoft OneDrive
Supports SSH connections Yes
Supports CRON jobs Yes
Init and shutdown scripts Yes
Rsync scheduled tasks Yes
Rsync Module mode Yes
Rsyc over SSH Yes
Scheduling S.M.A.R.T tests Yes
Periodic snapshots Yes
Snapshot autoremoval Yes
Periodic replication Yes
Scrub tasks Yes
Cloud sync task Yes
Setting Resilver priority Yes
Background services Yes
AFP configuration service Yes
Dynamic DNS service Yes
FTP access (incoming connections) Yes
Anonymous FTP Yes
iSCSI service Yes
LLDP service Yes
NFS service Yes
Rsync service Yes
S3 configuration service Yes
S.M.A.R.T monitoring service Yes
SMB service Yes
SNMP service Yes
SSH (incoming connections) Yes
TFTP service Yes
Network UPS service Yes
WebDAV access service Yes
RAID Levels / volume layouts
Stripe Supported with at least one disk
Mirror Supported with at least two disk
Z1 Supported with at least three disk, allows for one disk to fail
Z2 Supported with at least four disk, allows for two disks to fail
Z3 Supported with at least five disk, allows for three disks to fail
Log device Supported with at least one dedicated device
Cache device Supported with at least one dedicated device
Data Reduction
Thin Provisioning Yes
Compression Yes
Clones Yes
Deduplication Yes
Storage management
Maximum internal volumes 1024
Maximum iSCSI targets 512
Maximum iSCSI LUNs 1024
iSCSI LUN Clone/snapshot support
File sharing capability
Recommended local user accounts: 5120 (Max is unlimited, no license required)
Recommended local groups: 1024
Recommended shared folders: 1024
Recommended concurrent SMB/NFS/AFP/FTP connections: 4000
Compatible OS and Browser
Linux Yes
Windows 7 Desktop and above Yes
Windows Server 2008 and above Yes
FreeBSD Yes
macOS Yes
Supported browser Mozilla Firefox, Google Chrome, Microsoft Internet Explorer, Apple Safari
Surveillance Station
Maximum IP cameras: No Limit. Maximum depends on hardware configuration, camera resolution, number of streams, and stream bandwidth.
Virtual Machine Manager
Run various virtual machines on NAS, including Windows, Linux, or Virtual DSM Yes
High Availability Manager
Support for snapshots Yes
High performance
Intelligent read and write caches Yes, (HDD supported, recommended SSD)
* Specifications above are subject to change without notice. Actual product specifications may vary. Raw capacity estimated when used with 16TB disks.