The premier storage choice for creative audio/video professionals and multimedia enthusiasts around the globe, the PROMISE Pegasus2 now can deliver even faster performance with the new 20 Gb/s Thunderbolt 2 technology, while assuring enterprise-class reliability and ease of use.
Use your hard drives from your old Mac Pro
The Pegasus2 R4 Diskless System allows existing Mac Pro users upgrading to the newest Mac Pro model to migrate current storage seamlessly. Simply remove your drives from your current Mac Pro and reinstall into the drive trays of the Pegasus2 R4 Diskless system to get instant access to all of your data. Most drive models shipped with the Mac Pro line are qualified with Pegasus2. (Please refer to the Promise compatibility list for supported drive models.)
Blazing speed for 4K workflows
The Pegasus2 is the fastest Thunderbolt 2 storage solution available, delivering raw power for audio/video/graphics amateurs and professionals alike to manage and edit multiple compressed 4K streams.
Simple, flexible, and cost-effective backup solution for home use
Fast, safe, and reliable external storage is essential when protecting your valuable files such as music, photos, and videos. The hardware RAID capabilities of the Pegasus2 family protects all of the memories that were meant to last a lifetime that could be impacted from single drive failures, while simultaneously providing data protection and high reliability. The Pegasus2 family provides fast performance for popular applications such as iTunes, iPhoto, iMovie, GarageBand, Photoshop, and media center applications. Backup your irreplaceable digital media, documents, and also your entire computer or workstation to Pegasus2 with Time Machine in OS X.
Enterprise-class RAID protection
Once your data is cleanly backed up elsewhere, the drives in your Pegasus R4 Diskless System can be reconfigured as a RAID volume. Pegasus2 features enterprise-level RAID storage protection for your data, supporting a broad range of RAID levels as well as automatic error handling.
- Add your own hard drives from previous Mac Pro into the Pegasus2 R4 Diskless system
- Advanced RAID engine, supports RAID 0, 1, 5, 6, 10
- Robust error handling provides superior data protection
- Reliable, rugged yet elegant enclosure, ultra-quiet design
- Two Thunderbolt 2 ports for daisy chaining up to six Pegasus units, Apple Thunderbolt Displays, or Mini DisplayPort devices
- Hot-swappable bays for effortless drive access and serviceability
- Backward compatible with 10 Gb/s Thunderbolt hosts and devices
Did you notice?You can seamlessly move storage from your existing Mac Pro to your new system by installing drives in Pegasus2 R4 drive trays.
Apple Recommends ForTake advantage of 20 Gb/s Thunderbolt 2 performance for creative audio/video projects on your Mac Pro.
What's in the Box?
- PROMISE Pegasus2 R4 diskless 4bay RAID system (with four sets of drive trays and screws)
- Thunderbolt cable
- Power cable
- Quick start guide
- Other Features: RAID Support, Time Machine Compatible
- Connections: Thunderbolt 2
- Power: 78W max load (read and write); 55W idle mode
- Power Source: External power supply
- Height: 7.56 in./19.2 cm
- Width: 7.36 in./18.7 cm
- Weight: 9.9 lb./4.5 kg
- Length: 9.84 in./25 cm
- OS X v10.8.5 or later (OS X Mavericks ready)
- Available Thunderbolt port
- Mfr. Part Number: F29SR4R22000000
- UPC or EAN No.: 704118095551
- Note: Products sold through this website that do not bear the Apple Brand name are serviced and supported exclusively by their manufacturers in accordance with terms and conditions packaged with the products. Apple's Limited Warranty does not apply to products that are not Apple-branded, even if packaged or sold with Apple products. Please contact the manufacturer directly for technical support and customer service.
- Warranty: Two years; extended warranty options are available, please contact Promise for details.
Ratings & Reviews
I just received it today in preparation for the new Mac Pro I've ordered. Just as advertised, plugging in the four disks from my o I just received it today in preparation for the new Mac Pro I've ordered. Just as advertised, plugging in the four disks from my old Mac Pro worked well using the Thunderbolt port on my Mac Book Pro. I haven't used it long enough for an in depth review but so far I'm very pleased. It's fast and very quiet. The fact that it was diskless was a big bonus. …
- Written by DENNY G from Crystal Lake
41 of 44 people found this useful
Great device, a bit of trouble setting it up though
The Promise Pegasus2 R4 is a great device. It's not the smallest or quietest Thunderbolt RAID enclosure (though it's by no means l The Promise Pegasus2 R4 is a great device. It's not the smallest or quietest Thunderbolt RAID enclosure (though it's by no means large or loud), but it's definitely among the fastest. It's also highly versatile - each disk can either be used independently or as part of a disk array (RAID 0, 1, 5, 6, or 10) and easily handles I/O that brought my old Drobo to its knees.
That said, I suspect that the "diskless" Pegasus2 was probably somewhat rushed out, which led to some annoyances setting the device up. The process of adding hard drives is quite easy: just put the drive in the sled, secure the four screws, then slide into the Pegasus2 and latch into place.
However, all four drives show up as separate drives attached to the system. To combine them into an array, the Quick Start Guide says to consult the Product Manual, which is not included in the box. You can find it online if you're interested, but the short of it is that you need to use the Promise Utility. Normally this is included on the drive, but since this is the diskless model, it, too, must be found online. I can't provide a link here, but just search the internet for Promise Utility 3.18.0000.18 and you should find it in Promise's Download Center.
Once the Promise Utility is installed the fastest way to get started is to use the Wizard. After the array is set up you should be good to go. …
- Written by Kyle C from Dedham
27 of 28 people found this useful
Fast, quiet, solid
I've been using it for about a week now with a pair of 3TB Hitachi Deskstars (HDS72303) in JBOD mode (called "Pass Thru" by Promis I've been using it for about a week now with a pair of 3TB Hitachi Deskstars (HDS72303) in JBOD mode (called "Pass Thru" by Promise) transferred directly from an old Mac Pro. No problems at all, except that Promise doesn't include mounting screws for the hard drive sleds; the big head screws from the Mac Pro protrude from the side of the sled and prevent it from sliding back into the unit, so be sure you have small/flat head mounting screws. I'd read about power management issues with this unit, but it's been perfect through multiple sleep/wake and on/off cycles. Very pleased so far. …
- Written by Andrew H from New York
11 of 11 people found this useful
Setup requires a bit of research
Regarding a couple of the notes in reviews above:
There is no documentation in the box on how to set this up when adding your o Regarding a couple of the notes in reviews above:
There is no documentation in the box on how to set this up when adding your own disks. The quick start guide included refers to a unit shipped with disks installed. Going to the Promise website and downloading the Promise Utility software for the Pegasus line is required. It is still at that point not fully obvious on how to format the unit to a single logical RAID 5 array, but not too difficult to figure out using the wizard in the utility.
Regarding the unit not shipping with screws to secure your HDDs into the sleds, I thought so at first as well, but located a very small (1"x2") baggy with 20 of the needed screws in it. They may have missed including it in Andrew Hs unit, or it may have been overlooked as it is pretty small.
Kudos to Promise for including the thunderbolt cable.
In a silent room, the unit is audible, but not loud. Subjectively about one third as loud or less as my 17" MBP with fans ramped up.
Performance is as reported in the reviews. For anyone curious, the unit functions fine with WD Se drives, and still comes in cheaper than the populated 8TB version. …
- Written by Brandon B from Valencia
3 of 3 people found this useful
Fast and Reliable
I placed four Samsung 1TB Evo SSDs in the Pegasus, and it is screaming fast. I use it for editing/storing photos, and it runs sea I placed four Samsung 1TB Evo SSDs in the Pegasus, and it is screaming fast. I use it for editing/storing photos, and it runs seamlessly with Lightroom and PS. Setup was very easy. I have owned a Pegasus R6 for about a year, and that unit has performed flawlessly, so I am confident the R4 will follow suit. It's not cheap, but I would highly recommend the R4 to anyone who needs very fast storage options. …
- Written by Jeb B from PHOENIX
4 of 4 people found this useful
The best value in the Pegasus2 Line
I have 4x4TB Seagate drives installed in my Pegasus2 R4 Diskless. In Raid5 you end up with 12TB storage. The 4th disk is for redu I have 4x4TB Seagate drives installed in my Pegasus2 R4 Diskless. In Raid5 you end up with 12TB storage. The 4th disk is for redundancy to protect your data in case of a single disk failure.
-It runs very fast as a RAID 5.
-I love that it automatically powers on and off with my Macbook Pro.
-Setup is slightly confusing (even after reading the manual twice). Read the entire manual before you even start, even if you have RAID experience.
-initialization took several hours.
For anyone considering the R4 8TB, I cannot recommend it. It offers this enclosure, but unfortunately ships with 4 inexpensive consumer grade 2TB drives that the manufacturer is marking up almost 100%. That was extremely disappointing to find out. For the same price you can purchase this and shop around for the best deal on the fastest 3.5" drives you can find. …
- Written by eric F from brooklyn
2 of 2 people found this useful
Questions & Answers
Answers from the community
Will I be able to install any 4 (4T hard drive) on this PROMISE Pegasus2 R4 Diskless 4Bay RAID System?, and the final terabyte will be a total of 16T?
- Asked by Justin T from Fort Collins
I installed 4 - 4TB WD Black drives in mind and it works fine so far.
- Answered by Denny G from Crystal Lake
No, it does not.
The Pegasus2 (and all other devices that connect via Thunderbolt) are connected No, it does not.
The Pegasus2 (and all other devices that connect via Thunderbolt) are connected to just one computer and "belong" to that computer just like an internal drive or a drive connected via USB.
Of course, you can absolutely connect to the computer the device is attached to and access it via that computer (think "back to my Mac"). …
- Answered by Roger D
Has anyone had any luck getting the Pegasus2 R4 Diskless drive to work with Seagate Barracuda 3TB drives, ST3000DM001?
- Asked by Andrew A from Seattle
Yes I am using 4 of those exact drives in pass through mode. I picked them up at at BestBuy in Belle Yes I am using 4 of those exact drives in pass through mode. I picked them up at at BestBuy in Bellevue. I have had no problems thus far. …
- Answered by Aaron K from Seattle
My 2010 Mac Pro has an Apple RAID card & the 4 internal drives are presented as one HW RAID 5 volume. Is the Promise HW RAID compatible with Apple's?
- Asked by Leon S from Dearborn
I would like to know if this enclosure will function in JBOD?
- Asked by Denny G from Crystal Lake
I am not sure Ross B is answering the question that was asked. Concatenation is also known as "span I am not sure Ross B is answering the question that was asked. Concatenation is also known as "spanning" where you can tell your computer to see 2 or more individual drives as one large drive.
In my current Mac Pro I have 2 bootable drives, 1 drive for backup and one for extra storage. I would like to know if I can have a similar configuration using this enclosure. …
- Answered by Mark K from Vancouver
Can I use this without making a RAID? I have two hard drives I want to transfer to this enclosure for my new mac pro.
- Asked by Aaron K from Seattle