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December 4, 2009
Atom 1.6 GHz, 2GB RAM, RAID 6, 8-Bay Server
A Review of the QNAP model SS-839 Pro Turbo NAS
QNAP is shipping the SS-839 Pro Turbo NAS ($899). It supports up to eight 2.5" SATA or SSD hard disks configured as single disks, RAID 0 (striped), RAID 1 (mirror), Linear Disk (span), RAID 5 or RAID 6. In addition, online RAID capacity expansion, online RAID level migration, AES 256-bit volume-based encryption, iSCSI Target mode and Virtual Disk mode are supported. The SS-839 Pro includes a 1.6 GHz low power Intel Atom N270 CPU, disk on module (DOM) architecture, and 2GB of DDRII memory. Two eSATA and five USB ports are provided for external storage expansion and backup.
The SS-839 Pro Turbo NAS provides file sharing services for Mac OS X, OS 9, Linux and Windows computers. It can be configured as a Web server, MySQL server, FTP server, iTunes server, Multimedia server, Download Station, Surveillance station and can share a USB printer. The SS-839 Pro Turbo NAS supports the UPnP/DLNA multimedia protocol which allows devices that support this standard to stream photos, audio and video files from the SS-839 Pro to
The SS-839 Pro Turbo NAS measures 9.3" deep, 7" wide and 7.2". It weighs approximately 10.5 pounds with eight 2.5" Seagate 250GB Momentus 7200.4 hard disks installed. The purpose of this review is to determine how the SS-839 will perform with a mixed network containing OS 9, Mac OS X and Windows XP computers.
System Requirements
Supports Mac OS X, OS 9, Linux and Windows computers.
Requires up to eight 2.5" SATA or SSD hard disks.
Supports single disks, RAID 0, 1, 5, 6 and Span.
Requires an ethernet network.
Supports NFS, AFP, FTP, SMB, Telenet and SSH.
SMTP support for email notification.
What's Included?
The SS-839 Pro Turbo NAS includes an enclosure, eight hot swap trays, two ethernet cables, power cord, hard disk screws, installation CD and a printed quick installation guide.
HDD Install
The QNAP SS-839 Pro is sold without hard disks. To install 2.5" SATA or SSD hard disks, simply unlock the tray by pushing down on the bottom tray tab, push the bottom front tray release and the tray handle will eject. Remove the tray and attach the hard disk with four screws.
During this review, eight 2.5" Seagate model 250GB Momentus 7200.4 hard disks were mounted inside the QNAP SS-839 Pro. The SS-839 Pro tray system uses four screws on the bottom of each tray to secure the hard disks. Each tray is marked with a number. A sticker on top of the SS-839 indicates bay one starts on the far left.
Once the 2.5" SATA or SSD hard disk(s) are mounted and the trays are re-inserted into the QNAP SS-839 Pro the NAS is ready to be connected to the network. Each front tray lock should be activated to secure the hard disks. This hot swap disk drive system is well designed and easy to use.
Connections
The rear top panel of the QNAP SS-839 Pro provides a small cooling fan for the internal 220W power supply. A larger fan is mounted below it for cooling the hard disks. On the top right side two eSATA ports are provided followed by two ethernet ports and four USB 2.0 ports. Below that is a reset button and a security port. The VGA connector is reserved for future use.
The front panel of the SS-839 Pro provides a fifth USB port for easy access. The one touch copy button allows the contents of an external USB drive to be copied to the SS-839 Pro. An LCD is provided on the front of the SS-839 Pro, along with LAN, USB, eSATA and hard disk activity lights. The front of the QNAP SS-839 Pro provides the user with several indicators for monitoring the activity of the NAS.
Energy Usage
According to the Kill-a-Watt electricity usage monitor, the QNAP SS-839 Pro utilizes one watt while plugged in but turned off. If the ethernet cable(s) is removed power usage usually drops to zero watts. Energy usage increases to 27 watts while idle with eight 250GB Seagate Momentus 7200.4 hard disks installed. When running DiskTester 2.0 performance tests power usage increased to between 34-41 watts. Normal light NAS usage produced energy readings in the 29-34 watt range.
The QNAP SS-839 supports Wake on Lan. The user can shutdown the NAS using the QNAP web interface when it is no longer needed. The NAS enters sleep mode in approximately 60 seconds. This reduces the power usage to approximately one watt. Later, when the NAS is required an application like WakeOnLan 1.0 can be used to power up the SS-839 over the network. The NAS requires approximately 4 minutes to boot up, load the driver, mount the volume and start accepting connections when turned on via Wake on Lan. It would be nice if the time required to wake over the Lan could be reduced.
Another energy saving feature provided by the QNAP SS-839 is the ability to pre-set a schedule for power on, power off and restarts. Up to 15 events can be added to the power schedule. This is a nice feature for automatically setting the NAS to power down at night and back on in the morning.
These energy efficient features work together to allow the QNAP SS-839 Pro to support a 1.6 GHz processor with eight bay RAID 6 storage capacity, dual ethernet ports and external eSATA while requiring very little energy. It is unusual to find a NAS with all of these features and a low energy profile.
Initial Setup
Once the hard disks are installed, the QNAP SS-839 Pro will need to be powered and plugged into an ethernet network. Macintosh users will insert the QNAP Install CD and copy the QFinder for Mac image to the Macintosh hard disk. This tool is used to discover the NAS and provides basic network configuration capability. The server name, date, time, admin password, filename encoding and network settings can be configured with this tool.
The default admin user name and password is "admin". After the QFinder for Mac configuration is completed, the user will open a web browser window to the IP address established during the quick install process. The next step will be to fine tune the desired NAS features.
The SS-839 Pro NAS offers a wide variety of configuration options. One of the first steps to accomplish is to establish which users may access the SS-839 Pro. Once the SS-839 Pro web interface is displayed the user can create individual user accounts. New accounts can be created, deleted, passwords changed, groups assigned and quotas established for each user.
The default SS-839 Pro user settings enable the guest account on the public network share. Guest access can be disabled by selecting "Deny access" if desired. The SS-839 Pro Turbo NAS automatically establishes seven default network shares. Their names are Network Recycle Bin, Public, Qdownload, Qmultimedia, Qrecordings, Qusb and Qweb.
The "Public" volume is designed to provide access to everyone including guest users. The "Qdownload" volume is utilized to store downloads collected by the QGet application for Mac. This interface allows computer downloads to be directed to the NAS so that the computer does not need to remain on during long download sessions. The "Qmultimedia" volume is where all of the music, video and images are stored and accessed using the iTunes server, Multimedia server or with a UPnP/DLNA compatible device. The "Qweb" share is used for creating and sharing a website that is hosted by the QNAP SS-839 Pro.
Storage
The QNAP "Volume Manage" menu allows the user to configure the hard disks installed in the SS-839 Pro. Hard disks can be configured as single disks, a RAID 0 stripped RAID set, a RAID 1 mirror, a linear disk volume, RAID 5 or RAID 6. The RAID 6 setting is my favorite as it provides excellent data redundancy. With RAID 6, up to two hard disks can fail and the volume should still be able to be rebuilt once replacement hard disks are installed.
The QNAP SS-839 Pro works well with Windows, Mac OS 9 and Mac OS X clients. This is an ideal solution for mixed Mac networks as the default version of Mac OS X 10.4.9 and higher includes a bug that causes file sharing to be unreliable with Mac OS 9 clients. While using the SS-839 Pro, the Windows PC, Mac OS 9, Mac OS X 10.4, 10.5 and 10.6 computers were all able to easily share data.
Setup Tips: When the QNAP SS-839 Pro storage volume(s) was formatted using the EXT4 file system (instead of the default EXT3 setting), write performance was measurably increased during the AMUG DiskTester performance tests. In order to provide Mac OS 9 support firmware version 3.1.2 Build 1014T or higher was required.
The full featured QNAP SS-839 Pro provides an amazing array of network services. While Apple file sharing is a great feature, the SS-839 Pro is also capable of supporting FTP, NFS, Web site hosting, UPnP Media services, Download Station, iTunes services, Surveillance IP camera recordings, remote replication and can easily add new network applications via the QPKG plugin interface.
Web Service
The "Web Server" menu of the SS-839 Pro allows users to setup their own web site. HTTP, PHP and MySQL are all supported. Users can easily mount the default Qweb volume on a Macintosh and copy the web site data to the volume. Typing in the IP address of the SS-839 Pro displays the newly created web site. Setting up the Web server on the SS-839 Pro is as easy as checking "Enable Web Server".
Multimedia Station
The QNAP Qmultimedia share can be used to display photos with the Multimedia Station web interface. Photos copied to the Qmultimedia volume can be viewed by using a web browser directed at the NAS IP address plus :8080 /cgi-bin/Qmultimedia/.
Multimedia Station allows users on the network to browse the photo library, add descriptions and navigate between images. As the user only needs to copy images to the Qmultimedia network volume to add photos this provides an easy way to enable photo sharing over the network.
Movies
Another feature that the SS-839 Pro Multimedia Station supports is streaming video. Users can place a video folder full of movies on the "Qmultimedia" network volume and watch them using Multimedia Station. Movies streamed to the users browser will be limited to the video file formats their particular browser supports. However, users can get around these file format limitations by using the VLC application with Multimedia Station.
To use VLC to play a movie inside a video folder located on the SS-839 Pro Qmultimedia volume, open VLC and select the File:Open command. Click on the network tab and select the HTTP button. Now type the URL http://NAS.IP:8080/Qmultimedia/Qmultimeda/Video/MovieName into the URL field of the VLC window. This will allow the VLC application to play the movie while the source is streaming from the SS-839 Pro. VLC supports many formats. Using this method allows the SS-839 Pro to stream MPEG 1, 2, 4, .VOB, AVI, and even HD formats to a computer running the VLC application. In these tests, large video formats streamed well over the network . Once the user understands how the URL formatting works, it is easy to stream movies from the SS-839 Pro to VLC using Mac OS X clients.
iTunes ServiceTo setup the SS-839 Pro iTunes Service, simply copy the iTunes music folder to the QNAP Qmultimedia share. Next, verify the "Enable iTunes Service" feature selected in the iTunes Service setup menu.
With the SS-839 Pro iTunes Service setup complete, launch iTunes from any computer on the network to access the music library located on the NAS. To play the iTunes music selections select the shared SS-839 volume under "SHARED" as shown in the image below.
This setup allows network users to share a large music library without requiring them to copy the songs to the local hard drive. Using the SS-839 Pro as an iTunes Server provides an instant music library for users on the network. If music is added or erased from the SS-839 Pro "Qmultimedia" volume the iTunes Service listing is automatically updated. With iTunes sharing, the Qmultimedia network volume does not need to be mounted on the users computer. Only registered users mount the "Qmultimedia" volume on their desktop for making changes to the music selections available. In addition, if the music copied to the SS-839 Pro has album cover art assigned, it will show up when using the QNAP iTunes Service. However, for security reasons once music is copied to the SS-839, cover art and song information cannot be altered or added by a SS-839 iTunes Service user.
iTunes Service Formats
The QNAP SS-839 Pro iTunes Service supports AIFF, MP3 and AAC audio formats. Audio files with an extension of .aif, .mp3, m4p and .m4a are supported with the SS-839 iTunes Service. I was able to download music from the Apple iTunes music store, copy it to the Qmultimedia share and play it using iTunes sharing. The fact that QNAP supports AIFF is very nice. This feature allows users to save CDs in their native format for high quality playback on the computer and CD burning.
Front Row Compatibly
The QNAP SS-839 Pro "iTunes Service" is compatible with Front Row using the current firmware version: 3.1.2 Build 1014T dated 10/23/09. Front Row users can navigate to the "Source" option which allows the QNAP SS-839 to be selected for Music playback.
Playing SS-839 Stored Videos with Front Row
To play videos stored on the QNAP SS-839 Pro with Front Row, users can mount the "Qmultimedia" share on the desktop and create a video folder on this network volume. Next, copy movies to the video folder so that they can be accessed by Front Row.
Once the video folder is created on the "Qmultimedia" network volume and videos have been copied to the folder, select the video folder and use the File menu to make an alias (command L). Place this alias in the users movie folder on the startup hard disk. Now launch Front Row and select the video icon, next open the "Movies" selection and scroll down to the "video alias" folder and click on it. Inside are the movies stored on the SS-839 Pro network drive. Selecting a movie will play it using Front Row. One fact to remember is that if the SS-839 Pro "Qmultimedia" volume is not mounted the alias will not be displayed in Front Row. If you need more information on this configuration, QNAP has posted step by step instructions here.
Multimedia Service
The QNAP SS-839 Pro also supports the UPnP/DLNA DMA (Digital Media Adapter) format. To setup the Media Server check "Enable UPnP Media Server" and click on the IPaddress:9000 link to access the Twonky configuration page. Some of the UPnP players supported include the PS3, PSP and the XBox 360.
The QNAP SS-839 Pro will play multimedia files located on the Qmultimedia volume by default. The included Twonky server provides configurations for a large group of UPnP devices.
Download Station
QNAP has created the QGet application for Mac that allows files to be assigned to be downloaded directly to the NAS. The QNAP SS-839 Pro supports web downloading and BitTorrent downloads. The files are streamed directly to the NAS using the QGet application.
Qget for Mac allows network users to start lengthy download sessions and turn off their computer. The downloaded files can be accessed later on the "Qdownload" NAS share. This feature allows large files to be stored in a central location and provides an easy method for setting up BitTorrent downloads.
Squeezebox Support
Users that own Squeezebox or Transporter previously sold by Slimdevices and now Logitech will be happy to know that the QNAP SS-839 Pro fully supports these network music players. QNAP has created the QPKG plugin architecture that easily installs the Squeezebox Server (SSOTS). The user opens the QPKG Plugins menu under applications in the QNAP web manager and clicks on the GET QPKG button. The image below appears which lists several different applications available for install.
Next, click on SSOTS (Squeezebox Server) and download the Intel x86 version. Unzip the file and install it using the QPKG install menu. Upon successful installation you should see a QPKG entry like the screen below. Now click 'Enable' to start the SSOTS service.
The next step is to download the Squeezebox Server Perl Source Code. AMUG used version 7.4.1. Copy the squeezeboxserver-7.4.1.tgz file to the "Public" share on the QNAP SS-839 Pro. Now open a browser window and navigate to: http://NAS-IP:9099/ssods/. Click on the Tools menu and click on "Upgrade SqueezeboxServer". This process allows the user to designate the file used for the install, music folder and playlist location and then starts the Squeezebox Server. Later, users can go back to the settings menu and set the Squeezebox server to auto startup with the NAS being turned on or leave it in the default "off on startup" setting.
During these tests, the Squeezebox Server utilized approximately 6-12% of the Intel Atom N270 processor power while streaming music to a Squeezebox player. The SS-839 Pro hardware provides a nice platform for running a Squeezebox server.
Users looking for additional installation details can read the QNAP step by step instructions for setting up a Squeezebox Server. While this process requires a few steps, it is very easy compared to the old days when SSOTS was not officially supported by QNAP. The use of QPKG plugins offers a wonderful method for expanding the capabilities of QNAP NAS products.
The QNAP SS-839 Pro provides several methods for backing up data located on the NAS. These include backing up the NAS settings, Remote Replication to another QNAP NAS and backing up to an external hard disk. The SS-839 includes dual eSATA ports along with USB 2.0 ports which can be used to expand storage or backup data. The advantage of using the eSATA ports for backing up data on the NAS is speed.
The Power of Dual eSATA
AMUG connected the FirmTek SeriTek/2EN2 enclosure to the SS-839 external eSATA ports and initialized two Samsung F3 1TB model HD103SJ hard disks. The enclosure provides a dual bay, hot swap direct connect SATA interface. With this combination users can mount and format external 3.5" hard disks and use them to backup the data on the SS-839. Once the backup process is completed, the backup disk can be ejected using the "Remove Device" button under the "External Storage Device" menu and stored safely on a shelf or drawer away from electrical surges. If the user needs to expand the amount of storage available on the SS-839, the same dual bay enclosure can be used to mount additional hard disks and share their content over the network. Just insert a new hard disk into the enclosure, format it and set the permissions. The new hard disk is now available for network users connected to the SS-839.
The SS-839 eSATA ports may not work with all eSATA enclosures. The reason is that there are so many different variations of eSATA enclosures on the market today. Many of them require special controllers, firmware or drivers. As an example, the SS-839 is not port multiplier (PM) compatible. When AMUG connected a 5-bay SiI-3726 based PM enclosure to the SS-839 only the top hard disk was recognized by the SS-839.
In order to determine the performance available while using the SS-839 eSATA port, 45GB of data was copied from a RAID 6 configuration inside the NAS to an external Samsung F3 1TB mounted in the SeriTek/2EN2. This copy test required 8:04 minutes which equals approximately 94MB/s. This is a nice backup performance improvement over NAS enclosures that only offer external USB 2.0 ports. The external dual eSATA ports on the SS-839 offer high performance backup and expansion capabilities.
NetBak Replicator & Mac OS X Network Backup
The QNAP NetBak Replicator program only provides support for Windows clients. NetBak Replicator is a powerful program installed in the user’s system (Windows OS only) for data backup. PC users can back up files or folders on a local PC to a specified share folder on SS-839 Pro by LAN or WAN. This may be a valuable tool for Boot Camp users. When backing up to a network volume most Macintosh backup applications require the use of a disk image located on the SS-839 Pro.
Time Machine
QNAP informed AMUG that Time Machine support is available with firmware version 3.2. Page 143 of the new manual dated 12/14/09 describes how Time Machine is activated on the QNAP SS-839 Pro once firmware version 3.2 is installed. The user can enable the Time Machine option in the Backup section of the QNAP web manager. A password option and the capacity available to the Time Machine volume are user selectable. During our test, backing up 98GB of data from an Apple Mac mini to the SS-839 Pro Time Machine volume required 2 hours and 51 minutes on the initial backup. Subsequent incremental backup sessions with minimal changes required much less time to complete.
Remote Replication
The QNAP SS-839 Pro provides the ability to backup to another QNAP device using the Remote Replication feature. This feature allows the QNAP NAS to be duplicated to another NAS off-site or on the other side of the building. The file services can be stopped or continue during the replication process. The replication can occur automatically on a pre-set schedule or manually. Replication can take a significant amount of time for large data sets. However, this feature is nice for backing up the NAS to a remote site or for sharing information with a separate workgroup.
In this section of the review, the QNAP SS-839 Pro was tested for network file copy performance. A 12.18GB folder of video files was copied between the QNAP SS-839, a 2008 Mac Pro 2.8 GHz and a 2009 Mac Pro 2.26 GHz model. A gigabit ethernet network was utilized. The purpose of this test was to see how file server performance of the SS-839 would compare against using a 2008 Mac Pro 2.8 GHz as the file server.
The 2008 Mac Pro 2.8 GHz server and the 2009 Mac Pro 2.26 GHz client were able to copy the 12.18GB folder to and from each computer in less than 3:05 minutes. This time was used as the baseline performance result for a Mac Pro server performing this task. As you will see in the data below the SS-839 Pro was able to match or exceed the Mac Pro 2.8 GHz in this particular copy test.
QNAP SS-839 Pro Copy 12.18GB Video Folder Copy Test
| Configuration |
Copy From
|
Copy To
|
Time in Minutes
|
File Size
|
| Jumbo Disabled |
Mac Pro 2.26
|
SS-839 Pro
|
2:53
|
12.18GB
|
| MTU 1500 |
SS-839 Pro
|
Mac Pro 2.26
|
2:32
|
|
| - | ||||
| Mac Pro Server |
Mac Pro 2.8
|
Mac Pro 2.26
|
3:03
|
12.18GB
|
| Automatic MTU |
Mac Pro 2.26
|
Mac Pro 2.8
|
3:05
|
|
| - | ||||
| FireWire 800 |
Mac Pro 2.26
|
936DS Enclosure
|
2:55
|
12.18GB
|
|
936DS Enclosure
|
Mac Pro 2.26
|
2:17
|
The SS-839 Pro RAID 6 configuration provides redundancy and high bandwidth network file sharing performance. The SS-839 was able to provide this performance while only requiring 40-42 watts during the copy test. The 2009 Mac Pro 2.26 GHz utilized 158-164 watts to perform the same copy test and an external dual drive RAID 0 configuration was used to reduce the internal Mac Pro power consumption. The FireWire 800 test was added to show how close the performance of an Oxford 936DS based RAID 0 configuration is to the QNAP SS-839 Pro network connection.
Benchmarks
In the next performance test, DiskTester 2.0 and QuickBench 4.0 were used to determine how the QNAP SS-839 Pro scores compared to using the Mac Pro 2.8 GHz computer as the file server. The 2009 Mac Pro 2.26 GHz was used to run the tests as a client over gigabit ethernet. The 2008 Mac Pro 2.8 running file sharing was configured with a RAID 0 volume. The QNAP SS-839 Pro was configured as a RAID 6. The chart below displays the data.
QNAP SS-839 Pro Versus Mac Pro 2.8 File Sharing
|
Mac Pro 2.26
Mac OS X 10.6.2 Client gigabit ethernet |
| Test Size |
write
|
read
|
write
|
read
|
|
| DiskTester 10G |
76
|
94
|
74
|
108
|
|
| DiskTester 4G |
76
|
108
|
75
|
107
|
|
| DiskTester 1G |
76
|
108
|
77
|
108
|
|
| QuickBench 4 Extended (20-100MB) |
76
|
108
|
64
|
110
|
|
| -For Comparison | |||||
| FireWire 800 - 936DS | |||||
| DiskTester 4G |
65
|
75
|
|||
| QuickBench 4 Extended (20-100MB) |
66
|
75
|
The test results indicate the QNAP SS-839 Pro can provide file sharing performance close to the Mac Pro 2.8 with this single user configuration. A FireWire 800 enclosure with a RAID 0 Oxford 936DS based configuration was also tested for comparison. It is interesting to note the benchmarks rate FireWire 800 slower while the video copy test indicated copying data from the 936DS was slightly faster than from the SS-839.
The images below display the results of Helios LanTest 4.5 tests with the same QNAP SS-839 Pro and 2008 Mac Pro 2.8 file sharing configurations.
QNAP SS-839 Pro RAID 6
Mac Pro 2.8 RAID 0
The Helios LanTest indicates the QNAP SS-839 Pro provides performance data much closer to the Mac Pro 2.8 than previous NAS units AMUG has tested.
The QNAP SS-839 Pro can be configured as a Web server with MySQL, FTP server, iTunes server, Multimedia server, Download Station and with remote replication plus many additional full featured network applications are available via QPKG. The "Remote Replication" feature is a great option for backing up or sharing data in another location. The dual eSATA ports on the rear of the enclosure offer high performance backup and NAS storage expansion capabilities. The SS-839 Pro web interface is compatible with Safari, easy to use and allows for monitoring and configuration of the server. The SS-839 Pro keeps the hard disks cool without creating excessive noise. Placing the NAS within 3 feet of my workstation is a little louder than I would like, but once I located it under a desk 10 feet away I found it very quiet.
The temperature of the internal hard disks is displayed in the browser along with additional SMART data information. The web browser provides the ability to adjust fan settings, view CPU activity and view the available hard disk space. The QNAP SS-839 Pro offers a major step forward in NAS technology. Users looking for a high performance RAID 6 capable NAS with low energy requirements will appreciate the high quality QNAP SS-839 Pro.
Pros
Supports up to eight 2.5" SATA or SSD hard disks.
Intel Atom Processor 1.6 GHz and 2GB DDR II.
Supports single disks, RAID 0, 1, 5, 6 and Span.
Online RAID Capacity Expansion and Migration.
Provides two high performance external eSATA ports.
Five external USB ports for expansion and printer sharing.
Hot swap RAID 5 and RAID 6 support with automatic rebuilding.
iTunes Service supports AIFF, MP3 and AAC audio formats.
Provides dual 1000Mbps ethernet ports with load balancing.
Front Row is supported if the network volume is mounted.
Continued firmware development enhances features.
Shares files between OS 9, OS X, Windows and Linux.
Provides Web, NFS and FTP network services.
Firmware version 3.2 supports Time Machine.
iSCSI Solution with Virtual Space Allocation.
USB Printer compatibility list posted on-line.
AES 256-bit Volume-based Encryption.
Supports DDNS, AFP, WINS and AD.
Supports iTunes and UPnP DMA clients.
Supports SSL, SSH and FTP with SSL/TLS.
Advanced Remote Replication feature.
Provides Download Station support.
SMTP support for email notification.
Fan keeps hard drives cool.
Hard drive failure alarm.
Supports Wake on Lan.
PHP/MySQL support.
Great performance.
Low power usage.
Easy to install.
Small foot print.
Cons
RAID modes are not supported for external eSATA hard disks.
Wake on Lan requires approximately 4 minutes to activate NAS.
Multiple users with large simultaneous file sharing requests can slow performance.
QNAS SS-839 Pro gets 5 AMUGs out of 5!
While the QNAP SS-839 Pro does not have the CPU power of an Apple Mac Pro server, it provides a high quality hot swap RAID 5/6 NAS solution for networks that may not need a high powered CPU server. The small size, low carbon foot print and large feature set provided by the SS-839 Pro make it an excellent choice for expanding network services. The external dual
eSATA ports provide fast backup and storage expansion options. The wide range of network services provided by the QNAP SS-839 Pro will enhance any office or home computer network.Contact Information:
QNAP Systems, Inc.
21 F, No. 77, Sec. 1, Xintai 5th Rd.
Xizhi City, Taipei County, 221, Taiwan
Phone: +886 2 8698 2000
Fax: +886 2 8698 2270
http://www.qnap.com
Copyright © 2009
Arizona Macintosh Users Group, Inc. (AMUG). Visit AMUG at www.amug.org for news, discounts and friends. JOIN AMUG!
Disclaimer:
AMUG writers are volunteers. Readers should understand that all AMUG reviewers have a specific idea of what makes a product great. This same criteria may not apply to your specific needs. Product that is sent to AMUG for review is kept by AMUG for on going educational purposes, used to support volunteer activities, raffle, general meetings or sold. Links from the AMUG web site to Amazon, Newegg or other vendors may generate a small commission for Arizona Macintosh Users Group, Inc. Should AMUG receive a commission or credit it is used to help fund AMUG services and operations.