Questions & Answers for PROMISE Pegasus2 R4 8TB (4 x 2TB) Thunderbolt 2 RAID System
8 Questions + 19 Answers
8 Questions from the Community
can I swap drives out when full or near full?
If I set up the 8 tb system to have mirrored 4tb of space, or alternatively, RAID5, when the drive is full (lets say I want to now put in 4 4tb drives), can I just swap out the drives one by one??
Currently I have a Western Digital 2tb drive RAID1 (mirrored) and am near full. In the past, when I have tried to increase the drive sizes, I was unable to swap out one, let the system copy to the new drive and then with out the other. So I am wondering if that is something I could do with the PROMISE. Thanks for any insight.
- Asked by Wes Z from Elkhorn
- Flag as inappropriate (can I swap drives out when full or near full?)
I initially misunderstood the question. Upon looking further, I see that you ask this question with regards to a particular RAID enclosure available on the Apple Store. I notice under the "highlights" section of the product page that the bays are hot-swappable, so you can switch out those drives as much as you like.
- Answered by Stephen K from Provo
- Flag as inappropriate Answer (can I swap drives out when full or near full?)
Can I plug this device directly into my Airport Extreme (using thunderbolt gigabit adapter) and use as a NAS for all the computers on my network?
- Asked by Mark A from San Diego
- Flag as inappropriate (Can I plug this device directly into my Airport Extreme (using thunderbolt gigabit adapter) and use as a NAS for all the computers on my network?)
No. You will need to connect your Promise Pegasus2 to a computer, and have that computer share the drive over the network.
Yes. If you don't create an array, the disks in the Pegasus will appear as separate disks to the system and you should be able to access the data on them.
- Answered by Kyle C from Dedham
- Flag as inappropriate Answer (Can I put my existing 2 and 1TB hard disks inside this RAID system and still keep the data from my Hard Disks?)
Where is the Thunderbolt 2 Flash option?
- Asked by Jennifer G from Doylestown
- Flag as inappropriate (Where is the Thunderbolt 2 Flash option?)
That's not an option, it's an entirely different device called the Pegasus2 M4.
- Answered by Justin B from Carmel
- Flag as inappropriate Answer (Where is the Thunderbolt 2 Flash option?)
Are we limited to 2TB HDs, or can 4TB HDs be used
- Asked by Gary S from Chula Vista
- Flag as inappropriate (Are we limited to 2TB HDs, or can 4TB HDs be used)
Yes, you can use 4*3TB drives or 4*4TB drives. You could, for example, put the installed 2TB drives in "transport" mode, pull them out, and then set up a new set of physical drives and then create a new logical set. Please don't, however, take the advice of the user who commented that they installed 5400RPM drives. That would be a waste of the potential speed of this machine.
- Answered by Jonathan C from Corona Del Mar
- Flag as inappropriate Answer (Are we limited to 2TB HDs, or can 4TB HDs be used)
Isn't disk performance, ultimately, the gating factor and not Thunderbolt 2 performance?
How does the Pegasus2 compare, say, to a Drobo 5 (being that it's non-Thunderbolt 2 but presumably similar hard drives) outside of bandwidth/throughput? Is it true that at some point it comes down to the RPM and other performance characteristics of the hard drives being used rather than the hardware interface? If someone (me) already has a (a non-TB2) NAS is it better to just wait until PROMISE (and others?) come out with SSD TB2 systems so storage medium no longer is the gating performance factor and the true potential of TB2 can be experienced? Or am I just completely missing something fundamental?
- Asked by Carl B from Denver
- Flag as inappropriate (Isn't disk performance, ultimately, the gating factor and not Thunderbolt 2 performance?)
Technically, in traditional hard drives yes. The reason for this price isn't the thunderbolt 2 alone. It's the many different raid configurations. If you use striping you can effectively pull data close to 600mb/s by pulling the average hdd at 150mb/s across four. The raid enables much higher speed. I'll be utilizing raid 10 which is a nested raid system comprising of raid 1 and raid 0. This will enable about 310mb/s and give me a back up.
The reason this drive system is also very impressive is due to the fact it will allow for 4k video passthrough for daisy chaining while being able to transmit such a high signal. If you want a mac pro and a fast 4k monitor set up with fast data/data back up. This is the way to go.
but once again, if you bought a drive for thunderbolt two, that was a simple single drive system, you would have been correct.
- Answered by Randy P from Santa Ana
- Flag as inappropriate Answer (Isn't disk performance, ultimately, the gating factor and not Thunderbolt 2 performance?)
The 2012 Mac Pro does not have Thunderbolt, so you will not be able to use this device with that machine.
- Answered by Kyle C from Dedham
- Flag as inappropriate Answer (mac pro 2012?)