Questions & Answers for PROMISE Pegasus2 R4 8TB (4 by 2TB) Thunderbolt 2 RAID System
4 Questions + 9 Answers
4 Questions from the Community
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?)
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?)
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)
Where is the Thunderbolt 2 Flash option?
- Asked by Jennifer G from Doylestown
- Flag as inappropriate (Where is the Thunderbolt 2 Flash option?)