Promise Technology Smartstor NS4600 User Manual

SmartStor NS4600 Product Manual
298
RAID 5 – Block Striping with Distributed Parity
RAID 5 organizes block data and parity data across the disk drives. Generally,
RAID level 5 tends to exhibit lower random write performance due to the heavy
workload of parity recalculation for each I/O. RAID 5 works well for file, database,
application and web servers.
Figure 3. RAID 5 Stripes all drives with data and parity information
The capacity of a RAID 5 Volume equals the smallest disk drive times the number
of disk drives, minus one. Hence, a RAID 5 Volume with four 100 GB disk drives
will have a capacity of 300 GB. A RAID Volume with two 120 GB disk drives and
one 100 GB disk drive will have a capacity of 200 GB.
RAID 5 is generally considered to be the most versatile RAID level.
RAID 5 requires a minimum of three disk drives.
Data
Blocks
Distributed Parity
disk drives

Promise Technology Smartstor NS4600 Specifications

General

RAID levels	0, 1, 5, 10
Storage drive size	3.5 \
Hot-swap drive bays	Yes
Storage drive capacity	0 GB
Supported file systems	EXT3, FAT32
Storage drive interface	Serial ATA II
Total installed storage capacity	0 TB
Number of storage drives installed	4
Internal memory	0.25 GB
Processor model	-
Processor frequency	0.6 GHz
Maximum data transfer rate	1000 Mbit/s
Supported network protocols	FTP, DHCP, NTP
Compliance industry standards	IEEE 802.3i, IEEE 802.3ab, IEEE 802.3u
Certification	RoHS, CE, FCC, UL, TUV
Data transfer rate	3 Gbit/s
Dimensions (WxDxH)	152.5 x 229.6 x 188.2 mm
Power requirements	100 - 230 V/50-60 Hz
Networking features	Gigabit Ethernet
Compatible operating systems	Windows 2000/XP/2003/Vista Mac x 10.4 + Linux
USB 2.0 ports quantity	2
Ethernet LAN (RJ-45) ports	1
Power supply unit (PSU) capacity	90 W
Operating temperature (T-T)	5 - 35 °C
Operating relative humidity (H-H)	10 - 85 %

Weight and Dimensions

Weight	2500 g