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Promise Technology Pegasus J4 2.5" Thunderbolt Hard / Solid State Drive Enclosure (Empty)

B&H # PRJ4US Mfr # J4US
No Longer Available
Product Highlights
  • Supports 2.5" SATA SSD and HDD
  • 2x Thunderbolt 10Gb/s Interfaces
  • Data Transfer Rate: Up to 480MB/s (HDD)
  • Over 750MB/s with SSDs
  • Supports RAID 0, 1 and JBOD
  • Daisy Chain Up to 6 Thunderbolt Devices
  • For Mac OS X 10.6.8-10.8.2
  • Supports Time Machine in Mac OS X
  • Drives Sold Separately

The Pegasus J4 2.5" Thunderbolt Hard / Solid State Drive Enclosure (Empty) from Promise Technology is a disk array with four empty 2.5" bays for SATA hard disk (HDD) or solid state (SSD) drives (sold separately).

The array is equipped with two Thunderbolt 10Gb/s interfaces (cables sold separately) and delivers data transfer speeds of up to 480MB/s with 7200rpm HDDs or over 750MB/s with SSDs. It can be set up in a variety of RAID backup configurations, including RAID 0, 1 and JBOD, giving you the flexibility to choose higher data storage capacity or greater data protection.

The system supports daisy chaining up to 6 Thunderbolt-compatible devices. It is compatible with Mac OS X 10.6.8, 10.7.4, 10.7.5, 10.8 and 10.8.2. It supports Time Machine in Mac OS X. The enclosure is constructed from durable, lightweight aluminum.

Empty enclosure with four SATA hard disk / solid state drive bays
Connects to a computer via two Thunderbolt 10Gb/s interfaces (cables sold separately). Delivers up to 480MB/s with 7200rpm HDDs or over 750MB/s speeds with SSDs
Choose from a variety of RAID backup configurations, including RAID 0, 1 and JBOD, giving you the flexibility to choose higher data storage capacity or greater data protection. RAID 0 offers no redundancy, so it gives you the least amount of data protection, but offers improved performance and additional storage (100% capacity). RAID 1 creates an exact copy (mirroring without parity or striping) of a set of data on 2 or more disks, for increased protection but reduced capacity and transfer speed. JBOD is Just a Bunch of Disks, offering no redundancy and therefore very little protection. Each disk is accessed directly as an independent drive. It differs from RAID 0 in that it does not truncate the other drives to the size of the smallest disk in the array. The hard drive array supports daisy chaining up to 6 Thunderbolt-compatible devices, meaning you can combine high levels of data protection with high capacity and transfer speeds by configuring 2 daisy chained J4 arrays in a RAID 10 (RAID 1 + RAID 0)
Combine with a Mac mini to create a cost-effective server-storage solution. Benefit from the freedom to add more devices when you require additional storage capacity
Compatible with Mac OS X 10.6.8, 10.7.4, 10.7.5, 10.8 and 10.8.2. Supports Time Machine
Constructed from durable, lightweight aluminum
Capacity 0.0 TB
Array Type External RAID
Bays 4
Drive Types Supported 2.5" (6.35 cm) SATA hard disk drives and solid state drives
Channels 4: 2x per Thunderbolt port
Sustained Data Transfer Rate Up to 480 MB/s with 7200 rpm HDDs
Over 750 MB/s with SSDs
Video Stream Playback PCI Express (PCIe) expansion bus protocol integrated with DisplayPort protocol for simultaneous data transmission and video output
RAID RAID 0, 1 and JBOD
Combinations possible via daisy chaining
Desktop/Rackmount Desktop
Status Indicator HDD LED and Thunderbolt connections LED
Input and Output Connectors 2x Thunderbolt 10 Gb/s interfaces (cables sold separately)
Fan Yes, located on bottom of unit
Security None
Agency Certifications Not specified by manufacturer
System Requirements Mac computer with OS X 10.6.8, 10.7.4, 10.7.5, 10.8 or 10.8.2 and Thunderbolt port: MacBook Pro 13", MacBook Pro 15", MacBook Pro 17", iMac 21", iMac 27", MacBook Air, or Mac mini
Display monitor: Apple LED Thunderbolt, Apple LED Cinema, Dell UltraSharp U3011, Philips 273P3LPHEB/96
HDD or SSD (not included)
Not Windows compatible
Supported Drives SATA hard drives:
Hitachi 750GB Travelstar 7K750 (model #HTS727575A9E364) with 0D0 firmware
Seagate 250GB Momentus Thin (model #ST9250LT003) with 0001SDM1 firmware, 500GB Momentus XT (model #ST95005620AS) with SD26 firmware, and 750GB Momentus (model #ST9750420AS) with 0001SDM5 firmware
Toshiba 750GB MQ01ABD (model #MQ01ABD075) with 1U firmware and 500GB MQ01ABD (model #MQ01ABD050) with 01A firmware
SSD drives:
Toshiba 240GB THNSNS Series (model #THNSNS240GBSP) with TPCABBF0 firmware
Intel 240GB 520 Series (model #SSDSC2CW2400A3) with 400i firmware, 120GB 510 Series (model #SSDSC2MH120A2) with PPG4 firmware, and 300GB 320 Series (model #SSDSA2BW300G3) with 4PC10302 firmware
Samsung 256GB 830 series (model #MZ-­7PC256) with 2B1Q firmware
Electrical Requirements Power adapter (included)
Construction Aluminum
Dimensions (WxHxD) Not specified by manufacturer
Weight 3.53 lb (1.6 kg)
Promise Technology Pegasus J4 2.5" Thunderbolt Hard / Solid State Drive Enclosure (Empty)
  • Power Adapter
  • Limited 2-Year Warranty
  • Replacement Drives

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