The premier storage choice for creative audio/video professionals and multimedia enthusiasts around the globe, the PROMISE Pegasus2 can now deliver even faster performance with the new 20Gb/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 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.)
Incredible 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 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 centre applications. Back up 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.
About Thunderbolt 2
Thunderbolt is a revolutionary I/O technology that supports high-resolution displays and high-performance data devices via one simple port and a cable that carries both DisplayPort and PCI Express data. And it’s standard on every Mac.
PCI Express is the technology that links all the high-performance components in a Mac. And it’s built into Thunderbolt, which means you can get PCI Express speed outside the box.
With Thunderbolt 2 now built into the new Mac Pro and MacBook Pro with Retina display, you can connect up to three 4K displays at once. Thunderbolt 2 gives you up to 20 Gbps in both directions, allowing for super-fast data transfer between peripherals. You also have enough bandwidth to daisy-chain multiple high-speed devices without using a hub or switch.
Thunderbolt also provides double the power of USB 3.0, delivering 10 watts to peripherals for improved performance on the go.
- 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 10Gb/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 20Gb/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 (cable length : 1m)
- 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: 19.2 cm/7.56 in
- Width: 18.7 cm/7.36 in
- Weight: 4.5 kg/9.9 lb
- Length: 25 cm/9.84 in
- OS X v10.8.5 or later (OS X Mavericks ready)
- Available Thunderbolt port
- Mfr. Part Number: F29SR4R22000000
- UPC or EAN No.: 704118095889
Non-Apple Branded products / Third Party Products
- Note: Apple's One Year Limited Warranty does not apply to products that are not Apple-branded, even if packaged or sold with Apple products. Non-Apple branded products may have the benefit of a manufacturer's warranty provided by the product manufacturer - Please see your product box and literature for details. Rights under the product manufacturer's warranty are in addition, and not instead of, any rights that you have under consumer protection laws.
- Non-Apple Branded products / Third Party Products: Two years; extended warranty options are available. Please contact Promise for details.
Ratings & Reviews
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
71 of 74 people found this useful
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
55 of 58 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
29 of 30 people found this useful
I received my Pegasus2 R4 yesterday and installed my own HDs, connected the thunderbolt to my Mac Pro wine cooler and it was immed I received my Pegasus2 R4 yesterday and installed my own HDs, connected the thunderbolt to my Mac Pro wine cooler and it was immediately recognized and functional. Very quiet and seems well made. The "but" is with the utility software which I had to track down on the Promise website. I can't get it to work. It begins to start up and shows items in the menu bar for about 20 seconds and then disappears.
I've contacted Promise support and they've asked me to try it on another machine running something older than 10.9.4. Fortunately, my Macbook Pro fit the bill so I gave it a try with exactly the same results. Initial launch and then poof, it disappears. I've checked the permissions and even added myself and admins but it makes no difference. Could be a Mavericks thing, or maybe something I've overlooked. I'll give it a few more days before I get too negative about it. For now, it gets 3 stars. If the utility software issue gets sorted out I'll be happy to change that to five.
Keeping my fingers crossed that Promise will help me sort it out. If anyone on here has a suggestion, I'd love to hear it. …
- Written by Timothy S from Plymouth
Top notch performance.
I picked up this raid array yesterday, slapped 4x 1TB Seagate 7200 RPM NCQ(Native Command Queuing) hard drives in them, and got pe I picked up this raid array yesterday, slapped 4x 1TB Seagate 7200 RPM NCQ(Native Command Queuing) hard drives in them, and got performance on par with the fastest SSD's on the market in Raid 5 configuration. 680 Write, and 580 read. The performance goes up when you stripe them, but you don't have redundancy in that configuration. I'm very pleased with this product and highly recommend it. Did I mention its whisper quiet and goes to sleep/shutdown when the computer attached is in either states? the mac osx utility is also elegant and works seamless with a wizard and monitoring tool. …
- Written by Suni G from Floral Park
If you have a Mac Pro you need this
I recently recieved my enclosure. I had spent a great deal of time researching enclosures and it seemed the best. I backed up al I recently recieved my enclosure. I had spent a great deal of time researching enclosures and it seemed the best. I backed up all my data and put 4 4TB drives in and migrated my data from my old Mac Pro. I am very pleased. I use this with my 6 core Mac Pro. It is very fast. I had been using an external drive with USB3. There is no comparison.
Be sure to download the utility from Promise. It has nice features and is straight forward. I read the manual cover to cover so I felt comfortable with the device. It has performed perfectly. It is thrilling to have my 120K images so easily accessible. The fan is audible on the scale of my old 2006 Mac Pro. I will put the enclosure in a sound proof ventilated case.
It makes the Mac Pro a real thing of beauty. …
- Written by George P from prairie village
Questions & Answers
Answers from the community
How noisy is this with 4 drives? One Amazon review indicated it was pretty loud. Is it suitable for use in a home office environment noise-wise?
- Asked by Patrick M from Schenectady
Not noisy at all!! literally.. I can't even tell its there and this thing is one foot away from me.! Not noisy at all!! literally.. I can't even tell its there and this thing is one foot away from me.!!!!! love this thing... …
- Answered by Geza K from Toms River
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
Does the Pegasus2 R4 work with 4.0TB HGST Deskstar™ 7K4000 drives? The Pegasus site seems to list the Seagate Barracuda as the only 4TB option.
- Asked by Oscar B from San Francisco
I just received Pegasus2 R4 diskless, installed 4 x 4.0TB HGST Deskstar™ 7K4000 drives.
- Answered by 良 石 from 武蔵野市
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 Sonia L from Montreal
I have already done that and they seem to work fine. Installed 4-4TB WD Black drives from Amazon and I have already done that and they seem to work fine. Installed 4-4TB WD Black drives from Amazon and transferred my data with no problem. Time will tell how it holds up. Still using my Mac Book Pro to run the Thunderbolt system while I wait on my new Mac Pro. …
- 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