Pegasus32 Discussions

Mounting Issues - Promise Pegasus 32 R4 to a M1 Macbook Pro

2026-04-15T18:31:35.7000000

Hi there

I am havina problem with my Pegasus 32 R4. When I plug it into my Mac using the Thunderbolt 3 cable, all the blue lights come on and the Pegasus 32 R4 is whirring to show that it is working. However, when I look in Finder, there is no sign of it and no sign of it in the disk utility either. Please help!

Careful Updating Mac OS to 26.4 (Beta) - R32 "can't repair" Warning

2026-02-19T07:44:04.3870000

Just recently updated to macOS Tahoe 26.4 Beta (25e5207k). After update and reboot, errors popped up "macOS can’t repair the disk “Pegasus32”.

Both my systems can only be read and cannot write, repair or anything at this point.

Might be isolated, but no issues on other systems not on this beta.

Promise Utility Pro Version 24.5.7

2026-02-19T17:47:21.0270000

Hello. How come Promise Utility Pro version 24.5.7 isn't available as a stand-alone download? I get an update prompt through the application but can't find it--or really any mention of it anywhere--on the site. Was it removed because of a problem? Is it a Beta? What's the story?

Thanks.

-Doug

SSD Wizard Configuration

2025-12-15T13:34:05.1370000

Hello, I am planning to upgrade my Pegasus32 R4 with SSD drives.

I was wondering if there are any special considerations to take into account when configuring the disk array and logical drive, or any recommended parameters for using the enclosure with SSDs.

I am also wondering if it is necessary to enable a TRIM function in some way, or if everything is handled automatically.

My operating system is Mac OS Sonoma.

Can't access my promise pegasus32 after upgrading to macos Tahoe

2025-10-23T08:36:27.7930000

Hii

i can't access my promise pegasus32 R8 after upgrading to macos tahoe - I have it running on my mavbook pro M1.

Anybody knows what to do ??

Having Issues Creating Disc Array

2025-09-18T01:35:23.2900000

Has anyone had trouble having the 'start disc array' show up on Promise Utility Pro? I just got all new drives for more capacity on my 32r8, the drives show up but in my Promise Utility Pro I don't see any option to set as a RAID5. I reformatted all the drives for mac and they show up as 'passthrough drives'. Thanks to anyone in advance!

-L

Email Alerts

2025-06-19T21:18:35.9870000

Are email alerts available using Promise Utility Pro with Pegasus32 on macOS? Don;t see any way to set them, and nothing in the manual.

Have used Pegasus RAIDs on macOS for years and the email alerts have proved pretty useful in the past.

HFS+ or APFS for RAID10 on MailServer with M2Pro Mac Mini

2025-06-18T14:45:08.8770000

Hi,

I have a new Pegasus32 R8 32TB connected to a Mac mini M2 Pro running macOS Sequoia?

Any guidance on whether to use APFS or HSF+ formatting for Raid 10

Many thanks,

ft.

Pegasus 32 powers UP drives on own while Mac Studio 4 MAX is in sleep mode

2025-05-28T16:23:59.5300000

Brand new Mac Studio and new Pegasus 32 (64 TB). All operational and installed correctly. Quite often, Pegasus drives spin up and eight blue drive lights on enclosure start the flicker, as if copying data. Drives then power down (fan continues to run for some time) then process begins again at some point later. Mac is in sleep mode (low power state, display off, even though it may perform some tasks in background.) Online forums report similar issues but typically involve Pegasus 2 and 3 units. If you have experience with this this issue with the 2024-2025 Mac Studio, suggestions are welcome. See Mac attached energy settings.

Pegasus32 R4 - Upgrade Hard Drives

2025-05-07T01:40:04.3200000

Hi,

Looking for some guidance on how to replace my hard drives in the Pegasus32 R4. I previously had a couple drobo and could pretty easily figure out how to replace drives. I recently moved to Pegasus in the last few years, and of course have run out of available space.

This link on the main page makes it seem like there's just a couple of drives that will work, Promise SATA Hard Drive Compatability.

Going on microcenter, I'm looking at updating the 4 hard drives from their current 4tb to 10tb each, I read in other posts all the hard drives need to be the same size so I plan on getting 4.

How do you know which drives to get that'll work? Toshiba N300 10TB 7200 RPM SATA III 6Gb/s 3.5" Internal CMR NAS Hard Drive - Mfr Part#: HDWG71AXZSTA - For example, this drive isn't on the list but the brand and sizing looks right.

Appreciate any pointers on how to move forward finding compatable drives, and especially how to perform the drive swap, & update process.

Promise32 R6 just died

2025-05-14T13:15:09.1370000

Today I noticed that our Promise32 R6 with 24TB and around 16TB of data on it does not show up on our Mac Mini Server any more. Upon inspection and unplugging the unit for a few minutes, it is just completely dead. No light comes on at all, no sounds can be heard from it.

Of course this comes 6 months after the warranty has expired.

Is there anything we can do? I find it hard to believe that a >$3K hard drive just fails like that.

Are there any fuses inside, that might get triggered? Can we get it repaired?

Thanks for any hints.

Mac Studio M3 Ultra

2025-03-27T16:09:27.4500000

Did anyone succeed in mounting the Pegasus 32 R 4 on he new Mac Studio M3 Ultra?

I did install DEXT, but did not succeed so far. The Mac 'sees' the Pegagus in System Report.

Fimware of the Pegasus: 6.04.0000.18

(not the lates - but unfortunately, the disk image of 6.0.6 is corrupted on this website)