Drives failing and blue lights

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  • Last Post 19 hours ago
Robert Hambling posted this 2 days ago

This four year old Pegasus 32 drive has been perfect up until yesterday.

Now when i turn it on only the top four drives have both blue lights on, the second four drives have only one blue light on. The power button stays red and the iMac Pro doesn't see the drive at all.

The drive is connected to an iMac Pro 2018 running OS 15.6.1 Sequoia. I've run Promise Utility (new and old) Disk Utility, Disk Warrior and Disk Drill and none of them see it. Ive changed cables and cleaned all ports.

I would normaly assume drive failure but I find it hard believe four drives would all die on the same day?

It was set up Raid 0 - as recommended for my use.

Would anyone have any suggestions? I am at the end of my diagnostic capabilities. Any help would be more than welcome. Thanks

 

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R P posted this yesterday

Hi Robert,

If you have a RAID0, then if any drive goes offline the RAID is offline. That means macOS will not be able to see it. 

Please take this issue to the support alias at support@promise.com and if you can attach a service report.

Robert Hambling posted this yesterday

Thanks RP I appreciate the reply.

I realise if one drive goes they all go but when four drives (5-8) fail simultaneously would that maybe some other issue than one drive failing? If it is one drive how do I tell which one?

Again, thanks for the help.

R P posted this 19 hours ago

Hi Robert,

It is most likely that the drives themselves have not died, but the drive status is now DEAD. This can be caused by a few things, pull a drive out of the running RAID and it will be marked dead as it cannot be re-added to the RAID. Sometimes power events can cause one or more drives to be marked dead.

Usually this is recoverable. The key is knowing the sequence if events leading to the current state. It is necessary to determine if any of the drives have stale data and cannot be re-added to the array. Then the appropriate drives can be brought back online and a rebuild started on any disks with stale data.

In a RAID0, no disks can be stale as if one disk goes offline the RAID is offline. But it is still important to check the disk status, there may be one or more failing disks. Yesterday I looked at a service report where 2 of the disks SMART data said FAILING_NOW. The recommendation there is to try and copy the data off starting with the most important data. If this is not possible, then the recommendation is to take the failing drives to a business that does disk repair.

But I won't post the commands to bring the disks online here. Please email support@promise.com and attach a service report and we can help you bring your RAID online and let you know if there are actual disk issues.

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