Promise Technology Pegasus3 R4 User Manual

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Promise Technology Pegasus3 R4/R6/R8
RecommendedApplicationsforRAID1E:
• Imaging applications
• Database servers
• Generalleserver
RAID 5 – Block and Parity Stripe
RAID 5 organizes block data and parity data across the physical 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isgenerallyconsideredtobethemostversatileRAIDlevel.Itworkswellforle,database,
application and web servers.
RAID 5 stripes all drives with data and parity informaon
The capacity of a RAID 5 logical drive equals the smallest physical drive times the number of physical
drives, minus one. Hence, a RAID 5 logical drive with four 100 GB physical drives has a capacity of
300 GB. A RAID 5 logical drive with two 120 GB physical drives and one 100 GB physical drive has a
capacity of 200 GB. RAID 5 is generally considered to be the most versatile RAID level.
Advantages Disadvantages
• Implemented as a mirrored disk array whose
segments are RAID 0 disk arrays
• High I/O rates are achieved thanks to
multiple stripe segments
• Can use an odd number of disks
• Very high disk overhead – uses only 50% of
total capacity
Distributed Parity
Data
Blocks
Physical Drives

Promise Technology Pegasus3 R4 Specifications

General

Internal	No
Chassis type	Tower
Cooling type	Active
Device class	Small & Medium Business
Fan diameter	92 mm
Certification	CB, UL, cUL, TUV , BSMI, SPRING, BIS FCC, CE-EMC, VCCI, BSMI, RCM KCC
Product color	Black
LED indicators	Yes
Number of fans	1 fan(s)
Airflow (imperial)	70 cfm
Management platform	Pegasus Utility
Cable lock slot type	Kensington
RAID levels	0, 1, 1E, 5, 6, 10
Data transfer rate	40 Gbit/s
Storage drive size	3.5 \
Storage drive capacity	4000 GB
Storage drive interface	Serial ATA
Installed storage drive type	HDD
Supported storage drive types	HDD & SSD
Total installed storage capacity	16 TB
Maximum supported storage capacity	- TB
Number of storage drives installed	4
AC input voltage	100-230 V
AC input frequency	50 - 60 Hz
Number of power supply units	1
Power supply unit (PSU) capacity	250 W
Thunderbolt version	3
Thunderbolt ports quantity	2
Storage temperature (T-T)	-40 - 70 °C
Operating temperature (T-T)	5 - 35 °C
Storage relative humidity (H-H)	5 - 95 %
Operating relative humidity (H-H)	10 - 95 %
Cables included	AC, Thunderbolt

Weight and Dimensions

Depth	188 mm
Width	248 mm
Height	195 mm
Weight	6800 g