Hard disks network Ethernet NAS NDAS

[Killen]

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There are several technologies making it possible to connect a hard disk to a network:
The NAS:
Network Attached Storage
This name indicates a storage unit connected to the remainder of the system by traditional communications protocols (Ethernet, TCP/IP, etc), exactly like any other file server. Device NAS does not have its own operating system but uses a micro core dedicated to the management of the input-outputs like NFS (Unix environment), SMB/CIFS (DOS/Windows) or CPC (Netware Novell).
The contents are thus visible like a file divided on the network.
(journaldunet source)

The NDAS:
Direct Network Attached Storage
Resemble the NAS but in less practical because it is necessary to install a driver on each station to reach the disc network. The disc is then seen like a local disc on each machine. This solution is most economic and thus most widespread at the private individuals.

Products

Synology DS-101 (NAS)


The file server Disk Station 101 DS-101 of Synology is a compact case which is connected to the Ethernet network. It can receive a hard disk going up to 400 Gb and has 2 ports USB making it possible to connect external discs and 1 port USB making it possible to connect a printer USB or another disc, a card reader, to see a camera USB. The processor makes turn an operating system embarked Linux what frees the user from any expenses of license to use the DS-101.

Strong points:

* 3 functions waiter: files (NAS), safeguards and printers
* Simple to install and use
* File sharing between customers Windows and Macintosh
* Autosaving of the Windows customers
* Divisions of a printer USB 2.0 and 1 or 2 external discs USB 2.0
* Fast button of safeguard on the disc in frontage
* No licence to be discharged
* Silencer, without any ventilator
* Compact, portable format



Characteristics:

* Processor Intel IXP420BB with 64 Mb SDRAM and 16 Mb of memory Flash
* Accept a hard disk IDE (not delivered) up to 400 Gb
* Support the deactivation of the hard disk
* Administration by navigator Web
* Waiter DHCP and ftp
* Support Network Time Protocol (NTP)
* Possibility of safeguarding a disc report Flash USB (2 Gb max in FAT 32) towards the DS-101 and conversely
* Possibilities of division:
O up to 128 accounts users
O up to 64 groups
O up to 100 divisions
O up to 32 convergent connections
* Interfaces:
O Ethernet 10/100 Mbps on RJ-45
O 3 ports USB 2.0 Hi-Speed (1 external printer and 2 discs)
* Supported protocols
O Transport: TCP/IP, Appletalk
O Files: Microsoft Networks (CIFS/SMB), Apple (AFP 2.2), File Transport Protocol (ftp)
O Impression: IP network printing, Samba network printing
* Support of the customers under:
O Microsoft Windows 98 /ME/NT4/2000/XP/Server 2003
O Apple Macintosh 7.x, 8.x, 9.x, OS X
* Logiciel Synology Dated Replicator allowing an automatic synchronization under Windows
* Dimensions: 181 X 212 X 60 mm
* Weight: 1.7 kg

Price: approximately Rs. 13750.(without hard disk included)

Tests:
Roudroud (transfers on Ethernet 100Mbits router Linksys WAG54G)
upload towards DS-101: approximately 5.4 Mb/s
download since DS-101: approximately 7.1 Mb/s


Freecom Classic SL Network (NDAS to be checked)



Type of hard disk External
Format of the disc 3 inches ½
Connection (S) computer Ethernet (100 BASE-T), USB 2.0 (1.1)
Can be used within a space-division switching (PC/Mac)
Connectors Ethernet (100 BASE-T), USB 2.0 (1.1)
Access time 9 ms
Capacity of the hard disk 80 Gb
Buffer memory 2Mb
Hot plug Not
Dimensions 215 X 115 X 30 mm
Weight 0,75 kg
Software (S) provided (S) Manual & software on CD
Guarantee manufacturer 2 years parts and hand D works by return workshop

Price: appox. Rs. 8800 with a hard disk of 80 Gb


Iomega 160GB Network Hardware Drive (NDAS to be checked)



# Ethernet 10/100 - to divide and store your important photographs, your music, your videos and your files on Any computer without wire or ordinary of the network
# Easy - a simple connection enables you to divide your files
# Safety - Software of restoration system and autosaving included
# 160 Gb of space of storage for your domestic network or small company
# Contained of the kit:
# hard Disk network Iomega 160Gb
# Ethernet cable
# Food
# Guides fast installation
# Kit of startup including/understanding Iomega Automatic Backup (PC/Mac), Iomega Discovery Tool (PC/MAC), MusicMatch Jukebox (PC), Adobe Photoshop Album 2.0 Choke Edition (PC)
# Rate of transfer: 100Mb/s
# Access time 9 ms

price: approximately Rs. 12700 with a hard disk of 160 Gb


Buffalo HD-H120LAN LinkStation 120GB Network Storage (NAS)



A simple and fast installation makes it possible to enter in memory and to immediately share music, videos, images and other files via a Web navigator as well starting from a PC of Mac. Equipped with a print server incorporated, LinkStation simplifies the impression in network. Thanks to two ports USB 2.0, it is possible to add additional hard disks in order to increase the space of storage further and to make instantaneous backups.

Simple configuration and maintenance, changeable use and compact design make of LinkStation an obligatory solution for the storage and the file sharing in network, at home or at the office.
LAN Interfaces
Interface IEEE802.3/IEEE802.U
Standard (100BASE-TX/10BaseT)
Transmission Speed 10/100 Mbps
Transmission Encoding Method 100BASE-TX: 4B5B, MLT-3
10BaseT: Manchester coding
Access Method CSMA/CD
Port/Connector RJ-45
Cable Diversity Method (Internal) 100BASE-TX: Category5 2,4 UTP
10BaseT: Category3,4,5 2 UTP
Number of Ports 1
Transmission Outdistances 100m
USB Interfaces
Interface USB 2.0
Hi-speed (HS)
Full-speed (FS)
Low-speed (LS)
Connector USB A
Number of Ports 2
Transmission Max. Speed dated: 480Mbps (HS Mode)
Max.: 12Mbps (FS Mode)
Others
Power Consumption 17W
Dimension 2.4 X 6.94 X 7.4 in. (60 X 173.5 X 185 mm)
Weight 3.08 lb. (1.3Kg)
Operating Environment 5º - 35ºC, 20-80% humidity (non-condensing)

price: approximately Rs. 16500 with hard disk of 120 Gb included


Linksys Network Storage Link NSLU2 (NAS)



The file server NSLU2 of Linksys is a compact case which is connected to the Ethernet network. It has 2 ports USB making it possible to connect external discs USB (1.1 or 2.0). The processor makes turn an operating system embarked Linux what frees the user from any expenses of license and makes it possible to use the software developed in Open Source by the community of the users.

Strong points:

* Simple to install and use
* Divisions of 1 or 2 external discs USB 2.0
* Possibility of dividing 1 key USB and 1 Disc at the same time
* No limit with the size of the connected discs
* Management rights of access by user groups
* Management of plannings of safeguards (incremental, synchronization towards or since the discs network)
* No licence to be discharged
* Administration by navigator Web (embarked waiter HTTP)
* Silencer, without any ventilator
* Compact, portable format and not very cumbersome

Characteristics:

* Processor Intel Xscale IXP420 to 267 MHz with 32 Mb SDRAM and 8 Mb of memory Flash
* Administration by navigator Web
* Compatible UPnP
* Accept 2 hard disks or 1 disc and 1 key connected at the same time (formatted under the filing system Ext3)
* Possibilities of division:
O Several accounts possible users
O2 groups users (users and administrators)
O Management of the quotas by user
O Several possible simultaneous divisions
* Interfaces:
O Ethernet 10/100 Mbps on RJ-45
O2 ports USB 2.0 Hi-Speed
* Supported protocols
O Transport: TCP/IP
O Files: SMB (Server Message Block)/CIFS (Common Internet Spins System)
* Support of the customers under:
O Microsoft Windows 98 /ME/NT4/2000/XP/Server 2003
O Apple Macintosh OS X
O Linux
* Dimensions: 27,5 X 135 X 96 mm
* Weight: 185 G
* External power supply unit

Comments:
- Very slow it appears, has to confirm…
- Perfect for the do-it-yourselfers because this system works under linux

price: approximately Rs. 5500 delivered without hard disk


NetDisk de Ximeta (NDAS)



NetDisk, with technology NDAS, is the only hard disk which can be connected directly to your local area network (LAN) by using a Ethernet cable or to your PC by using cables USB! Now you can easily share additional storage with everyone on your local area network. NetDisk uses technology NDAS (Network Direct Attached Storage: Storage Attached Directly to the Network) of XiMeta, making easy the addition of storage high speed in an instantaneous way to your PC, while it gives you the option to divide the hard disk NetDisk with no matter whom on your network. Conceived for its facility of use and its capacity of extension, this solution of outvessel fuel storage combines the elements of raised performance, of reliability, safety and adaptability.

The strong points of this product are:

# Installation fast & easy
# Extensible - speed even does not change if you add of NetDisks™ additional
# simultaneous Mirror for a protected safeguard (including the software)
# instantaneous Storage at high speed
# Brought into hot service - connection and disconnection without extinguishing your computer
# Performance - not need to format or of partitionner the reader; connect quite simply
# Fast - 7200 RPM for a performance high speed and a transfer without tear.

Applications:

# Ideal for the domestic networks, offices personal, small and medium-sized companies and working groups
# Safeguard your whole CD collection and create your own personalized case.
# Add a large quantity of storage in order to satisfy the needs for the standards for today and organize the great quantities of data generated by the numerical walkmans MP3, cameras and the numerical caméscopes.
# easily Divide your files with all the people who use your network - Not configuration IP necessary.
# Safeguard in a convenient way all your files in an easily accessible reader. (including the software of mirror).
Design features: Hard disk external XIMETA 160Go - USB 2.0/Ethernet
Formatted capacity: 160 Gb
# Interfaces: Ethernet
# USB 2.0
# Plug & Play
# Brought into hot service

Type of cable: The category 5th or higher
LED: 2 LED: Food and lien/ACT
Research in reading (on average): 8,9 ms
Search time (on average): 0,8 ms
Latency (on average): 4,17 ms
Number of revolutions: 7,200 RPM
Buffer memory: 2 Mb
Access time in reading: 7 S
Food: 12V, 1,5A
Ethernet: Rate of transfer?? on standby of a test
USB 2.0: Rate of transfer?? on standby of a test
Certifications: Classify B FCC, EC Classifies B
Necessary system: Windows XP/2000
Dimensions: 36.5 X 210.5 X 119.5 mm
Weight: 1.36 kg

Price: approximately Rs. 8800 for the model 160 Gb

[Andrew]

Very good product for a general public use.