Pegasus2 R8 only sees top 4 drives

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  • Last Post 2 weeks ago
Florian Hannemann posted this 4 weeks 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

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R P posted this 3 weeks 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.

Florian Hannemann posted this 3 weeks ago

on the Pegasus2 R8 you only have the mainboard and then what looks like an old PCI socket. In there you have the back panel mith all 8 SATA connectors.

seating was my first thought as well. i reseated the backpanel several times and also cleaned the contacts in between. But no luck either.


i got hands on another backpanel. i would not bet that it works fine (one of the SATA connectors on that is damaged) but it looks like my problem isn't on the back panel but the actual mainboard :-(

Edit:
Fun fact on the back panel the bays are named (top to bottom they are ) HDD8, HDD7, HDD1, HDD2, HDD3, HDD4, HDD5, HDD6.

R P posted this 2 weeks ago

Hi Florian,

but it looks like my problem isn't on the back panel but the actual mainboard :-(

That would seem to be the case.

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.

Which raises the possibility that the Pegasus had developed this issue previously, which would explain why the seller sold it cheaply. Also very few people open a working device, they would only open it is something was not working correctly and they were wondering if they could fix it. 

... and I could start swapping pieces from my good R8 into this one

Why? If you have a good working Pegasus2 R8 why not just use that?

 

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