Promise Technology Pegasus3 R4 User Manual

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Promise Technology Pegasus3 R4/R6/R8
RAID 1 – Mirror
When a logical drive is mirrored, identical data is written to a pair of physical drives, while reads are
performed in parallel. The reads are performed using elevator seek and load balancing techniques
wheretheworkloadisdistributedinthemostefcientmanner.Whicheverdriveisnotbusyandis
positionedclosertothedataisaccessedrst.
With RAID 1, if one physical drive fails or has errors, the other mirrored physical drive continues to
function. Moreover, if a spare physical drive is present, the spare drive is used as the replacement drive
and data begins to mirrored to it from the remaining good drive.
RAID 1 Mirrors idencal data to two drives
The logical drive’s data capacity equals the smaller physical drive. For example, a 100 GB physical
drive and a 120 GB physical drive have a combined capacity of 100 GB in a mirrored logical drive.
If physical drives of different capacities are used, there is unused capacity on the larger drive.
RAID 1 logical drives on Pegasus consist of two physical drives.
If you want a mirrored logical drive with more than two physical drives, see “RAID 1E – Enhanced
Mirror”.
Physical Drives
Data Mirror

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