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Pegasus2 and nMP not reliable, options?
- Thread starter Cubemmal
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Just thought I would mention that .18 is the latest firmware AFAIK, I haven't checked for a week or two. You need to check via the Promise Utility.. to get it. Its not a exposed DL off their site.
Also Page 125 of the V 2.1 of the Manual.. RE: replacing a physical disk.. mentions.. to use a HDD or SSD .. Sata 300 or 600.
My nMP is not as I would like it with it sleep/wake up.. even after the nMP firmware update .. I haven't had issues with the P2 R4.. but I do seem to often need to drag my mouse to the "sleep" corner and hit the keyboard to get the thing (nmp) to wake up. Hopefully.. 10.9.3 or another firmware fixes that. I am slowly.. getting rid of any sleep settings.. and will look for the promise ones.
Also Page 125 of the V 2.1 of the Manual.. RE: replacing a physical disk.. mentions.. to use a HDD or SSD .. Sata 300 or 600.
My nMP is not as I would like it with it sleep/wake up.. even after the nMP firmware update
.. I haven't had issues with the P2 R4.. but I do seem to often need to drag my mouse to the "sleep" corner and hit the keyboard to get the thing (nmp) to wake up. Hopefully.. 10.9.3 or another firmware fixes that. I am slowly.. getting rid of any sleep settings.. and will look for the promise ones.Just thought I would mention that .18 is the latest firmware AFAIK, I haven't checked for a week or two. You need to check via the Promise Utility.. to get it. Its not a exposed DL off their site.
Also Page 125 of the V 2.1 of the Manual.. RE: replacing a physical disk.. mentions.. to use a HDD or SSD .. Sata 300 or 600.
My nMP is not as I would like it with it sleep/wake up.. even after the nMP firmware update
For firmware update just do a "Check for Updates" from the Promise Utility GUI. It will check both the Firmware and the Utility. I believe you can also get it off the downloads page for the Pegasus2.
I have been dealing with Apple on a nMP(6,1) and Pegasus2 issue which is a variant of what is discussed here.
When I attach three Pegasus2 R4 enclosures the nMP will not recover from sleep and is effectively frozen (no remote login possible either). A hard reboot and pulled thunderbolt cable is required.
Apple at this point believes it is a problem with the Pegasus2 enclosures.
If I add another manufacture (LaCie in my example) as the third device, no issues. If I only daisy chain two Pegasus2 enclosures, no problems.
All three enclosures also exhibit no problems with my rMBP under Thunderbolt 1.
If Promise does not come through with a solution I am dumping the enclosures...
When I attach three Pegasus2 R4 enclosures the nMP will not recover from sleep and is effectively frozen (no remote login possible either). A hard reboot and pulled thunderbolt cable is required.
Apple at this point believes it is a problem with the Pegasus2 enclosures.
If I add another manufacture (LaCie in my example) as the third device, no issues. If I only daisy chain two Pegasus2 enclosures, no problems.
All three enclosures also exhibit no problems with my rMBP under Thunderbolt 1.
If Promise does not come through with a solution I am dumping the enclosures...
Did you ever try three or more P2 enclosures daisy chained? That is when the sleep issues happen for me. I also tested it on a different nMP at the local Applestore. It also froze that system! All of this is regardless of hard drive type....as it freeze the nMP with the drives removed from the enclosures.
Nope. Only have one. Good to know as I was considering daisy chaining a second P2.
Two will work...three or more will not. Need to be on a separate port. Sucks! Particularly when you then have to buy another $300 10m optical cable.
Performance?
I've been seeing what I'd call "interesting" performance issues with the Pegasus2 enclosures that I have connected to the new Mac Pro. Each is on its own Thunderbolt channel. One has 4 drives in it, with 2 RAID0 volumes. The other has 2 drives in it, also in a RAID0 volume. These RAID volumes were created using the Promise utility, not OS X.
The drives in question are 7200RPM SATA2 or SATA3; they're certainly not the fastest things available.
What I've found with Blackmagic is inconsistent read and write results. Sometimes a volume will get 200+MB/s reads and writes. Other times it'll stumble with the test first starts, and stay around 10MB/s (not a miss-print). It applies to both enclosures.
As a test, I nuked two of the volumes, reset the drives to "Pass-Thru" mode, and recreated the RAID0 volumes in OS X software. The results? Consistent performance numbers of ~250MB/s on reads and writes. Not necessarily better, but reliable.
At this point, I can't recommend the Pegasus2's internal RAID controller if performance is needed. Certainly if you intend on using RAID5, which OS X doesn't support internally, then the enclosure's controller would work. But if you're just doing RAID0 or 1, there's really no reason to not use software RAID. The CPU in the Mac is certainly significantly more powerful than what's in the enclosure, and handling RAID/storage requests won't make it break a sweat at all.
What have others found?
I've been seeing what I'd call "interesting" performance issues with the Pegasus2 enclosures that I have connected to the new Mac Pro. Each is on its own Thunderbolt channel. One has 4 drives in it, with 2 RAID0 volumes. The other has 2 drives in it, also in a RAID0 volume. These RAID volumes were created using the Promise utility, not OS X.
The drives in question are 7200RPM SATA2 or SATA3; they're certainly not the fastest things available.
What I've found with Blackmagic is inconsistent read and write results. Sometimes a volume will get 200+MB/s reads and writes. Other times it'll stumble with the test first starts, and stay around 10MB/s (not a miss-print). It applies to both enclosures.
As a test, I nuked two of the volumes, reset the drives to "Pass-Thru" mode, and recreated the RAID0 volumes in OS X software. The results? Consistent performance numbers of ~250MB/s on reads and writes. Not necessarily better, but reliable.
At this point, I can't recommend the Pegasus2's internal RAID controller if performance is needed. Certainly if you intend on using RAID5, which OS X doesn't support internally, then the enclosure's controller would work. But if you're just doing RAID0 or 1, there's really no reason to not use software RAID. The CPU in the Mac is certainly significantly more powerful than what's in the enclosure, and handling RAID/storage requests won't make it break a sweat at all.
What have others found?
try some real world test by copying lets say like a 50gb folder and time it on a pegasus raid0 configuration and then the same but with the osx software raid...to see if theirs any difference