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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

Mar 29, 2012 4:04 AM in response to Steve McRea

My R6 has run perfectly since December when I wrapped the Thunderbolt cable in tin foil ! However Promise have been in touch and are swapping out the chassis today, which will solve the intereference issue.


Will inserting my 6 drives in the replacement unit make it start up as before, or will I have to start afresh once I insert the drives ? Everything is backed up anyway but I could do without the down time of moving 8 TD of data around !


Thanks

Tony

Apr 2, 2012 9:05 AM in response to Infotech 24 7

I have been watching this thread as I had the same problem with my european band cellphone causing the Pegasus R6 to disconnect when I brought the phone close to it.


I have just raised a support case with Promise and am looking forward to their response.


The issue is simple to reproduce, and the drive always disconnects within seconds of my phone being brought close to the unit. I live far from the closest cell tower, with I imagine causes my phone to transmit at a higher power.


Observing the tinfoil around the cable theory - that didn't work for me. I wrapped the entire cable in three layers of heavy duty tinfoil and the Pegasus still disconnected when I brought the phone close to the unit itself.


After I removed the tinfoil, I held my phone while on a call, physically touching the thunderbolt cable where it joins the thunderbolt display or the Macbook Pro, and was unable to make it disconnect. The problem for me seems to be entirely when the phone is brought in proximity with the Pegasus R6 chassis (50cm usually, but up to 1m at times).

Apr 2, 2012 1:07 PM in response to Gierran

Just a couple of thoughts:

We keep coming back to the mobile phone interference theory over and over.


Has anyone tried to force the Mobile phone to WCDMA rather than GSM? This will make a big difference as modulation schemes and power levels are much different. Power is lower in WCDMA.


Also I thought for those using tin foil around the cables that it maybe a good idea to ensure that the tin foil is well grounded.


Anyway it seems like Promise have a HW fix for the issues so hopefully you'll get a replacement unit soon.

Apr 2, 2012 1:14 PM in response to Gierran

Because the tinfoil seems to work for some people, it's possible that the RF signal from the phone is entering the drive as common-mode interference via the cables (the Thunderbolt cable and/or the power cable). If that's the case, a better solution may be the use of snap-on ferrites such as these: http://leadertechinc.com/bisectedround.shtml placed right next to the cable as it enters the unit. (Sorry, don't have an EU source handly, although surely there are many.)

Apr 4, 2012 9:37 AM in response to Infotech 24 7

Hello,


I would like to add an experience here with an new imac i7 3,4 GHz and a brand new Promise Pegasus R6 12 Tb.

I use it for free lance video editing with FCPX and FCP 7. It worked fine until today.

I started updating a website via Yummy FTP while editing, and it is the first time it happens, the Pegasus disconnected. After reconnecting again, it did it again.
I checked the Thunderbolt cable is in the right place.

Thunderbolt Pegasus R4 Experience?

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