Pegasus2 R8 only sees top 4 drives

  • 44 Views
  • Last Post 4 hours ago
Florian Hannemann posted this 5 days ago

Hi,

I have a Pegasus2 R8 that only sees the top 4 disks.

Let me explain the situation a bit.
I got it for a very low price on eBay with drives in it. It arrived a few days ago and it wasn't the best packaging. The 120mm fan got ripped into pices and the drive bays got a bit of beating causing the front parly ripped off. So I assume there has been some damaged done to the inners of the Pegasus.
Looking at the logs on the device, it was switched off for some years already so not clear how long that issue presist.

I do have another Pegasus2 R8, so I was able to do some testing of the drives and they turned out to be fine.
I also manage to update the firmware to 5.04.0000.61 (which is the same as on my other unit).

I already tried to do the factory reset in the Promise Utility. All successfull, but no change in the situation. Neither did it make any change to hook it up to an old macOS 10.15 host (normal host would be a macOS 26).

A quick look that i had on the inside, looks overall fine to me. I took the unit apart to remove the last few loose plastic pices and to give it a bit of a cleaning on the inside. Which also gave me the impression that someone else was in there before.

Interesting is that the blue LEDs work on all bays and when I did the firmware update, I also had the amber flashing.
Finnaly when I insert a drive in one of the lower 4 bays, I can hear it spinning up.

So my current situation is that the fan is disconnected (replacement is on the way) and I could start swapping pieces from my good R8 into this one, but somehow I am not really willing to do that right now.

It feels a bit like some issue with the back panel to me.
If it would be the power brick, I would expect that the unit should be able to see drives if i just put one drive into the affected bays, but it doesn't.


So open for any idea :-)

CU Florian

R P posted this 4 hours ago

Hi Florian,

It feels a bit like some issue with the back panel to me.

Seems likely that there is some issue with the backplane. But I wonder if it is fully seated on the Pegasus Motherboard. 

There are 2 expanders involved, but I don't know if they are on the backplane or motherboard, seems like the connection to one expander is lost.

Close