Pegasus 32 mounts fine, disconnects after about a minute

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Sean Holland posted this 13 January 2024

Connected to Mac Studio running Sonoma 14.2.1. 

The Pegasus starts up, it shows up in the finder, it connects with Promise Utility. Promise Utility shows everything fine. I can see all the files on the Pegasus 32. After a minute, it shuts down and then I get the "not properly ejected' message. I've tried different ports on the Mac Studio and the Pegasus and a different cable. Same result.

One thing is that there have been a couple of power outages in recently when the computer and the Pegaus were on. 

Does anyone have any ideas about this?

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R P posted this 22 March 2024

Hi Sean,

In power outages there are often huge voltage spikes which can damage equipment.

The scenario where the Pegaus powers up, mounts, then dies after a minite or so is what is commonly seen when the power supply is weak.

It seems likely that this is the situation here.

In the past some forum posters have purchased a replacement power from someplace, possibly EBay but I don't know. Apparently, for one poster the power supply had more connectors than the one in the Pegasus so they left them extra pins unconnected. They reported that this worked. The power supply connector is keyed and there's only one way that it will lock into place.

Another solution is to buy a used Pegasus chassis and swap out the power supply. You can find used chassis on Google shopping, EBay and possibly other places like Amazon.

Paul Szilard posted this 4 weeks ago

I am getting the same problem, but had no power outages. There is no logical reason why the PSU would work for 10 minutes and then drop out. Also there is no indication on the lights.

Florentin Constancias posted this 4 weeks ago

Dear all,

I have experienced exactly the same (connect for a few minutes then complain I did not eject properly)  and progressively my promise 3 R4 could'nt mount properly and now I have one failed drive. Could it be related to a Macos update?

R P posted this 4 weeks ago

Hi Florentin,

There have been a few cases where after a macOS update the DEXT driver had to be reinstalled. It shows as loaded but needs to be reinstalled for it to work. I'm not sure why, but if you are using the DEXT driver try reinstalling it.

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Florentin Constancias posted this 4 weeks ago

Hi Florentin,

There have been a few cases where after a macOS update the DEXT driver had to be reinstalled. It shows as loaded but needs to be reinstalled for it to work. I'm not sure why, but if you are using the DEXT driver try reinstalling it.

 

I did but it didnt solve the issue. Currently accessing my Pegasus3 with an olde Mac in safe mode which can only see the Pegasus [no other ext hard drives] (see my other post) and rsync ing the files to the new mac external hard drive.

Please see my other post for the report diagnostic file.

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