Thunderbolt Pegasus R4 Experience?

Has anyone else got any first hand experience of the Promise Pegasus R4 (or R6) with their iMac? I bought mine this week and managed to load it up with around 1.4Tb (it holds around 3Tb) no problem. Now, today I can't get the drive to stay connected before it ejects for more than 5 minutes. It's driving me mad and I'm very concerned as I moved all my family video onto it from another drive and it won't stay connected long enough to get it back onto another drive again.

iMac, Mac OS X (10.6.8), 2011 i7 3.4, 256Gb SSD and 16Gb RAM

Posted on Jul 16, 2011 8:38 AM

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455 replies

Sep 26, 2017 6:16 PM in response to Infotech 24 7

Yep. Same problem here...Immediately after installation the Pegasus3 R4 RAID started mounting and dismounting from the iMac all day long every day. Then within 2 weeks the chassis went bad so I replaced it under warranty. Promise refused to pay shipping for the broken chassis to be returned to them and they placed a $699 hold on my credit card for the new chassis until I pay to ship the old chassis back to them. The new chassis doesn't work and their RAID driver won't load on the imac. Spent hours on the phone with their level 1 tech, level 2 tech, and then their "senior engineer"... the Pegasus3 still won't power up all the way nor connect to the imac. The company said they need to "email a design engineer" and he will look at the system report and get back to me". They are not in a hurry to fix the problem. The company states that my data is safe, but we will see if they are correct if they can ever get the Pegasus to work again.

Aug 29, 2012 12:57 AM in response to Cheesenightmare

Oh man,


Had it working ONCE, put a bunch of info on it and now it just sits there orange light. The thunderbolt blue light on the front comes on but in the system report on my imac i7 it lists under thunderbolt no connections and when it connected it used to show a connection 2 result.


Waiting for Promise to get back to me but AARRRRGHHHH!!! how frustrating. Tried every combination of thunderbolt cables directions to ports etc etc.. restarting etc etc.. got it working once but now it just sits there

looking at me with its evil orange light..


what do you suggest i do people.? whats the fastest way to get a result out of Promise?



Mark

Sep 13, 2012 9:02 AM in response to Infotech 24 7

I'll add my experience.


I got my R4 and started seeing random disconnects within a week. No dead drives. When the R4 was online all the systems checked out OK. The system log never displayed the correct date and time -- always showing the unit powering on in 1970 or so. Sometimes when the R4 went offline I couldn't physically power it off: I had to yank the power plug from the back.


- noticed a pattern; if the R4 was turned off for several hours it would work longer without disconnects. However, once the first disconnect happens it becomes increasing in frequency until it only stays online for 20-30 minutes at a time. Sometimes the unit worked properly up to 15 hours initially, but the disconnects always returned eventually.


- bought a new TB cable. This changed nothing.


- covered by TB cable in tinfoil. This changed nothing.


- Contacted Promise. Got an RMA and they shipped me a brand new chasis. This changed nothing. Initial great experience for 1-2 days, followed by the same disconnect pattern described above.


- Contacted Apple. Got a new Retina Macbook Pro, just in case mine was botched. This changed nothing.


- Further contacted Promise, they asked me to disable the power management with a terminal command, citing that this fixed issues for some users. This changed nothing. Same pattern of 1-2 days operating normally, then the disconnecting pattern as usual.


- Did some more online research.... found this forum 😟 This is where I am now.

Aug 4, 2011 10:26 AM in response to Infotech 24 7

Hello Infotech,


After we send an email to the Promise Technology here in Eindhoven the Netherlands the called us back. And after a while the told us to connect the R6 with the thunderbolt cable to the left port.

So we dit! And unbelievable but the system works perfect now?


User uploaded file


So if that's the trick wy worries any futher. It runs perfect on our iMac now. It's online now for several day's and no problems at all now.

Apr 23, 2014 11:38 AM in response to Infotech 24 7

As I said, we tried everything in this thread but still had disappearances. After reading other’s problems with thunderbolt on Lacie’s site and basically everywhere,User uploaded file I wrapped my thunderbolt cord in a double layer of aluminum foil. I felt like an idiot, it looks crazy but I haven’t had a dismount since. Not one, no glitch or problem. Coincidence? Don’t know. I tried it out of desperation but it seems to have worked. If everyone here tries it and it works, we could be on to something. Costs nothing.

Sep 5, 2011 9:57 AM in response to Infotech 24 7

I had also the big problem to delete the master images from Aperture. So i started an new discussion and the things i did there were amazing. After all those things the Pegasus is working fine now for a couple of day's now.

And we are using it very intens. We shoot about over 1000 images a day and all those images are stored on the Pegasus R6.


If you go to this disscussion you will see what i mean; https://discussions.apple.com/thread/3142403?answerId=16082385022#16082385022

Nov 17, 2013 7:48 AM in response to Infotech 24 7

In answer to

Steve McRea

Re: Thunderbolt Pegasus R4 Experience?

Nov 16, 2013 7:17 AM (in response to Matchless297416)

My Pegasus is configured as a RAID 10.

I understand than that you have two pairs of disks as Raid 0 mirrored one pair into the other. I used to have a similar configuration with my Pegasus 6, that is two sets of three disks each as Raid 0 mirrored into an identical set for a total of six disks.


Everything was ok until I was hit by the self-ejection accident, and after that I decided to stop using Raid on the Pegasus.


But I had been reading on various places that using a Raid set as startup disk was not a good idea, since the gain in transfer speed would be offset against increasing latency, and latency is the most important factor in the performance of the operating system, where accesses to the disk are very frequent but only for small chunks of data,


This would require the shortest possible access time or latency, while transfer speed impact would be negligible.


I am not an expert myself, I just rely on opinions by people in the know, and I would be pleased if somebody would like to share his experience.

Jan 17, 2014 1:18 AM in response to JulieCor

It seems Disk Utility and the R6 "don't understand each other" very well. There is a thread on MacOS X disk utility not being able to expand a partition on an R6 expanded logical volume. I wouldn't be surprised if the problems [RackZoZing] describes are of a similar nature. Hope Apple looks into this thoroughly, as Pegasus units are one of the few (Apple sold!) reasonably affordable, serioulsy sized and speedy solutions.

Mar 1, 2012 9:30 AM in response to ke3z

As I’ve mentioned previously on this thread.. my R4 has been running flawlessly since October last year (touch wood). The only heart stopping issues so far have been self imposed:

  • - All Red lights Appeared next to each drive. Reason: 2 year old son ejected all of the drives 😁
  • - Latest OSx update for some reason decided to set my startup drive back to the internal imac drive and not the promise???

Apart from that it’s been running great!

I love running OSx from the Promise… a big reason is that when you have an issue such as the startup drive changing for no reason I simply fired up OSx on the internal drive and started to debug. Quickly noticed from Disk utils that the promise was nicely mounting and singing like a bird. I think that this will be a really useful feature as time goes by. I can imagine running utils like disk warrior from my internal drive if I ever have more serious drive issues with the promise.

It really looks like getting good or bad HW is luck of the draw. It sounds like Promise are waking up to the fact that they may have screwed up in the manufacturing process and are RMA’ing chassis with no questions asked. I certainly hope that they have done a root cause analysis on the issue and it is no longer seen on units coming off the line now.

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Thunderbolt Pegasus R4 Experience?

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