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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

Sep 29, 2011 1:23 PM in response to Infotech 24 7

just found this tread, our r4 with 2 TB disks is connected to MacMiniServer running Lion 10.7.1 Server

it seems te be dropping disks...... and losing data (recently copied from OLD NAS, which still had the data pff...)


when raid-set is re-created disks are fine again?


anyone new info yet ? what is the status on iMac's with thunderbolt update ?

any news form levin (had visit from Promise and... ?)


will check back..

Oct 1, 2011 1:46 AM in response to MrBelloNLD

Hello everybody!


Sorry for this late reaction. On our office it was a madhouse... but we are back.

Our Promise Pegasus R6 is indeed unmounted two times last week. So al the data from our system (with the Terminal, Shell and Systemprofile) is send directly to the Promise Technology office in the USA.

The still working hard to find the problem. The also mentioned that the will send us a new R6 and take the old one back to examen the R6.


And last but not least, Apple Care Centre just called us yesterday with the question how things are now with the R6. We told our story and the came with the same proposel. To take our iMac back and examen the iMac to see what can causes this problem. But until that we wait to see what the new R6 will do.

We have now also an direct contact by Apple Care Centre to keep then up to date with the progress of the R6 from Promise.


So for everybody who has the same problem now, keep up the good faith. I think there will be an solution shortly.


Greetings from the Netherlands, Levin den Boer.

Oct 4, 2011 1:52 AM in response to Infotech 24 7

Well well well,


We are up-to-date with all the updates - including firmware updates and our two R6's seemed to work without issues - until late last week one of them started to play up again. Again, ejected couple of times by itself while we were working off it.


We haven't yet lost any data but I'm sure it's just a matter of time..


I really hope they sort out this issue soon as our whole post production workflow relies on these two R6's!


@Levin - I assume you haven't heard anything since they've arranged to pick up the R6 and the iMac?

Oct 8, 2011 11:58 AM in response to Infotech 24 7

Hello everybody,


We see the messages from all other users. Just to let you know we don't post every conversation we have with the main headquarters of Promise Technology. Because if we do that you will be lost in words.

If there is a good solution or update. We will write it directly into this disscusion form.


For pjburnhill: we still have contact. The R6 is not in stock in the Netherlands at the moment.

Oct 8, 2011 2:42 PM in response to levindenboer1975

We've repacked our r4 (Marked DOA) and it's back to de distributor, including the log's and so on.

like the r6 mentioned by Levin, we ordered a new r4, but it has not yet been delivered. Distributor still can't tell us when to expect a brand new one.

unlike Levin's we running on a MacMiniServer 2.0 i7 again seen failed disks, and the Pegasus became unresponsive (volume dismounted, disk status failed, powerbutton does not work (had to pull powercable))

after powercycle volume was briefly mounted, than 2 disks failed, so got dismounted.


are the new one's really out of stock?, or.... who knows please tell, now running on two time 2 Tb Firewire disks.


@infotech: how are the LaCie's doeing, and are you using apple's cable's ?


kind regards, keep u posted.

Oct 8, 2011 7:26 PM in response to Infotech 24 7

I don't have an iMac. But using R6 with early 2011 MBP and thought this might help. Initially I connected MBP to ACD to R6 and noticed R6 ejects very frequently. I bought two TBD's and using with R6 - MBP to TBD1 to TBD2 to R6. Installed latest and greatest updates. So far I didn't notice any ejects. I am using R6 for Time Machine Backups and iTunes.

Oct 9, 2011 6:40 AM in response to MrBelloNLD

I connect the R6 with iMac, it's not stable. 2 Days after the arrival date, one of the Hard Disk Failure. Then,


I repacked the Promise Pegasu R6 (12TB) to Apple Store and they make a full refund for this unstable product.


What a bad experience with PROMISE product. I'm glad that Apple is so RESPONSIBLE to give me a full refund.


I would wonder if SYNOLOGY will make their NAS with Thunderbolt support. Then I should buy it with SYNOLOGY. As their product is MUCH MORE STABLE and RELIABLE.

Thunderbolt Pegasus R4 Experience?

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