Promise Technologies Pegasus J4 2TB Enclosure for 2.5-Inch SATA SSD/HDD (J4HD2TBUS)
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- 2TB (4x500GB) Drive Configuration
- Supports 2.5" SATA SSD and HDD
- 2x Thunderbolt 10Gb/s Interfaces
- Data Transfer Rate: Up to 386.82MB/s
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Top Customer Reviews
I've been looking for a non-Raid thunderbolt solution since 2011. After extensive research, I took the leap with this Pegasus J4. My drives (Crucial M4 512GB SSDs) were not on the compatibility list at the time of purchase, but I desperately took the risk. The core purpose is to fetch data to my Early 2013 Retina MacBook Pro. I do 3D animation, Music Production, and Video Editing. All of my content are stored on the SSDs in the J4.
- Easy to open and install drives
- Two thunderbolt ports (should be standard for every thunderbolt device)
- Mac Drivers seem stable thus far
- Holds 4x 2.5" drives
- Neat size can fit in my bag
- MUCH quieter than my Lacie LBD.
- No Windows Driver yet (I have Windows 8 on bootcamp)
- Included software could be enhanced. (Better realtime monitoring, fan control, and extensive drive health)
My primary need has been met, which is a single cable to access all my SSDs at high speed.
UPDATE: This enclosure has been serving me well. Still, I don't see any support for Windows in sight (maybe never for this model). Lately I've also been considering the Blackmagic MultiDock 2 which has similar function, but rack-mounted with easily swappable drive bays...for a better price. So based on what you prefer (mobility or modularity), they are your best options. HOWEVER, if you need Thunderbolt 2 support, your best bet as of now is the Multidock 2.
* Mavericks has been out six months (as of this review) and Promise still advises that driver or firmware update is still incomplete. Form support: "Hi , Thank you for choosing Promise Technology for your storage solutions. Unfortunately Mavericks is not compatible with the Pegasus J4 unit for now . Our engineering team is working on this issue and soon will there be an update on the same. We are sorry for the inconvenience ."
* The unit has been discontinued. As it is not still being made, Promise has reduced incentive to provide support and update software for the existing unit.
* Most 2.5" drives are not supported by the unit. Promise maintains a compatibility list that only has 22 drives on it, with no large SSDs among them. The largest supported SSD is 300GB. Searching other forums and reviews finds many users complaining that attempts to use other drives fails.
Again, it's a shame. The unit is a wonderful concept. I would kill to have four SSDs in this form factor. But modern cheap 750GB and 1TB SSD drives are unsupported, and six months and counting on official Mavericks support utterly destroys trust in the Promise brand. That's downright disturbing for hardware that was released only two years ago.
At the time, I was looking for an empty external storage enclosure with the following features:
- ability to plug four drives or more;
- ability to pick my own drives (i.e. empty enclosure);
- ability to use this in JBOD mode;
- DAS enclosure with Thunderbolt connectivity;
- ability to daisy chain with other Thunderbolt devices;
- very compact (relatively speaking; of course such a thing can't be as small as a single portable external drive).
My reasons for wanting such an enclosure are that I wanted to setup a Mac Mini as small home server with a large ZFS pool; but since my server is very small, I didn't want this enclosure to take up a lot of room.
With all of those requirements in mind, I feel that the Pegasus J4 delivers in a big way. Its physical footprint is just perfect for my current usage, since I can just stack it on top of the Mac Mini; it's even very close to the Mac Mini design-wise. Of course, the downside of that is the fact that we are very limited in terms of the amount of storage that can be used in the enclosure, because it only supports 2.5'' drives. But the second Thunderbolt port makes up for it, and I feel confident that if one day I need more storage capacity, I can simply purchase another similar enclosure, and daisy chain it with my current one.
The only real downside that I see in this product is that it can only fit 9.Read more ›
Combining these in RAID 0, I get a 1 TB drive that screams at 700-800+ MB/s and use fusion drive to combine this with 1-2 larger Hard Drives and you will have sizeable storage that beats anything on the market. If you are not interested in speed, then there is no reason at all to spend a bit of money on this. Putting hard drives in, even 72k will only get 300-400 and a limited amount of space with no room for failure. I would much rather have no room for failure with an extremely fast array that is backed up. You can get a fully redundant array for 2k with similar storage size but you are also in the same boat if a drive fails unless you spend even more for a backup drive or wait for the RMA. I would rather spend half and get the same/better performance out of a stylish device and backup to other redundant volumes (which needs to be done anyway if you care about your data)
Any comparison to the Seagate Desktop and Portable Thunderbolt shows a clear lack of understanding as both those devices (which I own for the record) do not serve to function above USB 3.Read more ›
Most Recent Customer Reviews
OK, so you have read all the negative reviews. Initially, let me say that for the past year I have had four 15mm 2tb drives humming right along as Raid 0. Read morePublished 12 months ago by Amazon Customer
Love the size and drive implementation vs other enclosures. What this unit lacks is a Thunderbolt 2 upgrade (they went to a full size 2. Read morePublished on June 26, 2014 by MIP_Live
I purchased one through a different vendor, the unit was bad, customer service from Pegasus was helpful but we were unable to resolve the issues with the original unit. Read morePublished on February 15, 2014 by Conrad J Wredberg
I purchased a J4 (from another vendor) and intended to use it with 1x480 GB OWC Mercury SSD, 1x256 GB OWC Mercury SSD, and 2x500 GB Western Digital Black notebook HDD's. Read morePublished on December 10, 2013 by Tim Brauer
I got the version of J4 with no installed drives in late July 2013.
It must be the latest incarnation as it will only work with OS/X 10.7 and above. Read more
This unit is nicely designed, and works great. But there are a couple of things you should know about it. These are quibbles on my part... Read morePublished on July 23, 2013 by George Jardine
Okay I own a pegasus r6 a great but large 6 bay thunderbolt device. I own not one not two but three lacie little big disks a 2 bay 2.5 inch device. with an insanely whiney fan. Read morePublished on March 28, 2013 by philipma1957