Promise Technology Pegasus3 R4 User Manual

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Technology BackgroundPegasus3 Product Manual
RAID 60 – Double Parity + Stripe
The PROMISE RAID 60 combines RAID 6 distributed (double) parity and RAID 0 block-level striping.
RAID 60 can increase performance by reading and writing data in parallel or striping, while
simultaneously providing parity.
PROMISE implements RAID 60 by creating a data stripe across two RAID 6 sets. This creates very
high fault tolerance, two drives in each RAID 6 set can fail without interrupting I/O or loss of data.
A minimum of eight drives are required for a RAID 60, so this option is available on the R8.
PROMISE RAID 60 starts with RAID 6 double parity, then stripes the blocks
RAID60isavailableontheR8.Togureoutthecapacity,multiplythesmallestdrivecapacitybyfour.
So an R8 with 8 2 TB drives has a capacity of 8 TB with a RAID 60.
Advantages Disadvantages
• High Read data transaction rate
• Medium Write data transaction rate
• Good aggregate transfer rate
• Safest RAID level
• High disk overhead
(four drives as hot spares on R8)
• Slightly lower performance than RAID 50
Recommended Applications for RAID 60 include applications that require extremely high fault
tolerance and good I/O performance.

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