Promise Technology Pegasus3 R4 User Manual

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Technology BackgroundPegasus3 Product Manual
Advantages Disadvantages
• Simplest RAID level
• Can increase read performance by
processing data requests in parallel
since the same data resides on two
different drives
• Very high disk overhead – uses only 50% of
total capacity
RecommendedApplicationsforRAID1:
• Accounting
• Payroll
• Financial
• Any application requiring very high availability
RAID 1E – Enhanced Mirror
RAID 1E offers the security of mirrored data provided by RAID 1 plus the added capacity of more than
twophysicaldrives.Italsooffersoverallincreasedread/writeperformanceplustheexibilityofusingan
odd number of physical drives. With RAID 1E, each data stripe is mirrored onto two physical drives. If
one drive fails or has errors, the other drives continue to function, providing fault tolerance.
RAID 1E can mirror data over an odd number of drives
The advantage of RAID 1E is the ability to use an odd number of physical drives, unlike RAID 1
and RAID 10. You can also create a RAID 1E Logical Drive with an even number of physical drives.
However, with an even number of drives, you obtain somewhat greater security with comparable
performance using RAID 10.
RAID 1E logical drives consist of three or more physical drives. You can create an array with just two
physical drives and specify RAID 1E. But the resulting array is actually a RAID 1.
Physical Drives
Enhanced Data Mirrors

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