Most of this information came from searching the internet and the openNAS wiki. Also with a little help from Google Translator. These are rebranded Netronix NAS units.
What is Not Inside
The unit comes without a hard drive. I have installed a 320 GIG drive successfully, so this works. I have read that it will work with up to a 400 GIG hard drive but I have not tried this myself.
What is Inside
There are two NH-220 versions, one has 32MB RAM (Allnet, Flepo) and the other 64MB RAM (Longshine 8220, ADS) main memory. I have an ADS version so this is the type I am concerned and will cover.
The NAS runs an embedded version of Linux. Some of the major components:
PMC-Sierra (MSP2006 MIPS) MSP (Multi Service Processor) SoC
(acquired from Brecis Communications)
Core: MIPS 4Km
Speed: 167 MHz Max
Interfaces: (2) 10/100, PCI SDRAM, local bus, UARTs, SPI/MPI 2-wire serial
PMC site has additional CPU specs.
This CPU does not have a Memory Management Unit (MMU).
ITE 8211F IDE Controller
- Compatible with the ATA/ATAPI-6 specification
- 512 bytes FIFO for data transfer per IDE channel
- Supports Scatter/Gather function for DMA/UDMA transfer
- Supports pre-fetch and post-write function for PIO mode per IDE channel
- Single Port 10/100 Fast Ethernet Transceiver
BOTHHAND 10/100 Base Pulse Transformers
ProMOS Technologies Inc.
SDR Synchronous DRAM
- Density 256 MegaBit (2 Chips on ADS = 64 Meg Bytes)
- Organization 16M x 16
- Voltage 3.3V
- Refresh 8K
- Part Number V54C3256164VD
- Package T
- Speed 7 (143MHz@CL3)
Macronix International (MX)
Boot Sector Flash
- Density 32 MegaBit (4 Meg Bytes of 8 bits)
- Part Number MX29LV320ABTC-90
- Access Time 90 ns
Board Connections
J1: NAS power supply in connection
J2: Power connection for IDE hard drive
J3: NAS internal fan connection
J4: COM1
J5: 10/100Mbps RJ-45 Ethernet port
J6: COM2 (?)
JP1: JTAG (?)
JP2: IDE interface
SW1: NAS Power ON/OFF switch
SW2: Reset Switch
LD1: Power LED
LD2: HDD-LED
LD3: Network LED