Pegasus3 R4 Excessive Disk Activity

  • Last Post 21 April 2021
Chad Cole posted this 20 April 2021

I have a Mac Pro (2019) with an internal Pegasus R4i and an external Pegasus3 R4. The external drive is purely used for TimeMachine and the R4i is my primary data and workspace storage. When I bought the MacPro I replaced the stock 3TB Toshiba drives in the R4 with new Seagate Ironwolf 10TB (ST10000VN0008) drives, listed at the top of the compatability chart. 

I have used the Pegasus3 R4 with other Macs, prior to using it with this MacPro and never run into the situation I'm currently experiencing. Whenever I log in, or switch users, the drives in the unit kick into high gear and the disk activity light will blink rapidly for 20 to 30 minutes. And this is not a TimeMachine backup running. In fact, I would call the disk activity excessive even when compared to a normal TimeMachine backup. 

The information in the Promise Utility doesn't seem to provide any particular insight into what could be causing the but it does let me know "All components are OK." I don't know enough about the Mac OS Activity Monitor to know if there's a way to see what's causing the disk activity commotion or not.

Has anyone else experienced anything similar?

Unit is running the latest firmware and I have updated drivers several times.

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Mark Farrall posted this 20 April 2021

I just received the Pegasus32 R4 and got it installed ok. First thing I see, is each of the Drive Activity Lights is flickering. The Promise App indicates that LD0 is running. This I believe is the synchronization process (?)....making sure drives are consistent (?)..... wish the details were provided on the installation sheet. I worry when disk drives start being accessed and I have nothing running that would be accessing them. Thats usually not a good indication. Be nice to know what to expect.   (asside that, My 2017 R2+ has been great.... have to get everying thing moved to the R4... just ran out of room on the R2+.... ).       :)

Mark Farrall posted this 21 April 2021