Promise Utility crash, Automatic Rebuild running over a week after failed drive replacement.

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Chems Touati posted this 3 weeks ago

Pegasus2 R8 had failed drive.  Downloaded latest Promise Utility and launched app, it connected/mounted drive.  Ejected failed drive, then as soon as I inserted the new drive (HGST compatible) the Promise Utility crashed.  Relaunched Promise Utility, it was unable to connect to Pegasus2.

Although I never selected the "Automatic Rebuild" preference, the rebuild seemed to have started in the background.  Then the entire OS froze (macOS Monterey) and the computer became unusable so I have no status or feedback from the Pegasus.  

The power button is orange.  All disk LEDs are blue, and disk activity LEDs are flashing.  The Pegasus has been in this state for over a week.  There was about 16TB of data on the volume, but I think the rebuild should have finished by now.  I'm reluctant to just pull the A/C power from the Pegasus while there still seems to be disk activity.

Any advice?  If I power cycle the drive, will the rebuild start over, or will all data be lost on the volume?  If I restart the computer (hard re-boot) will it interupt the rebuild process and power to the Pegasus unit?  Not sure how to proceed.  Appreciate any insight.  Thanks.

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R P posted this 3 weeks ago

Hi Chems,

The default configuration has auto-rebuild enabled.

The status LEDs seem normal for a rebuild in progress, but it should normally take less than a day.

A rebuilt will continue after power up if the Pegasus has been powered off.

Probably the best thing to do is unplug the power cable from the Pegasus, wait a minute or so for the drives to spin down, them plug it back in. If you can connect the Pegasus to your Mac, generate a service report, zip it and attach it to your post.

Chems Touati posted this 3 weeks ago

After hard reboot of Pegasus2 and Mac, I was able to launch Promise Utility, after a macOS message that the "disk was unreadable" that I "ignorded", the disk mounted and files seem intact, I was able to generate a subsystem report (attached).

The rebuild seemed to have stopped.  In Promise Utility, under background Activities, the "start" button is greyed out.  The new disk (PD2)  is now set to "pass thru".  So I assume I can now set PD2 to "unconfigured" and then "start rebuild" button should appear and I can restart the rebuild?  All disk LEDs are blue, thunderbolt light blue, power button still orange.

Thanks for the quick reply, been very stressed!

Attached Files

R P posted this 3 weeks ago

Hi Chems,

I don't see any rebuild events in the events, but they may not be saved in the NVRAM logs.

Everything looks normal under the circumstances, PD2 shows hundreds of command timeouts before it was shut down. Most new drives arrive in passthru mode, and rebuilds can't start to a passthru drive, so I don't have any idea what happened here.

And you have the right idea, you'll need to change PD2 from passthru to unconfigured, then you can start a rebuild to the unconfigured drive.

Chems Touati posted this 2 weeks ago

Wonderful!  Thank you so much!  My Pegasus2 is now back and acting as the reliable workhorse that it is.  Promise has delivered so many years of solid service.

After getting over the complete system hang, upon restart, the rebuild in Promise Utility was smooth and only took about 15 hrs.  Event log looks great, and disk i/o speeds back to normal, so far all data looks intact, and I haven't had any mounting/disconnection problems with sustained read/write.

Thanks for easy RAID managment for simple humans!

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