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High Sierra not working like Sierra or El Capitan....

(@tmuller)
Active Member Customer

Under Sierra and El Capitan, if I needed to swap drives, all I did was pull out the original, wait until soft raid detected the removal and inserted the new disk, initialize it and then add it to the volume. This is a RAID 5 volume I was doing this too.

Under High Sierra, this does not work. It believes the disk is the same disk once you insert one back in the same location as previously removed.

Not sure why this was changed but this is a real PITA to manage disks with this behavior (at least for me).

Most of the time, I have to shutdown, remove the disk, boot up without it, then shutdown AGAIN and boot up with the new disk installed to get similar behavior to previous OS's.

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Topic starter Posted : 26/12/2017 1:00 am
(@softraid-support)
Member Admin

This seems like a hardware issue. What is your hardware configuration? What enclosures are you using?

SoftRAID should work the same for replacing disks in a RAID volume under all OS X releases.

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Posted : 26/12/2017 9:06 am
(@tmuller)
Active Member Customer

This seems like a hardware issue. What is your hardware configuration? What enclosures are you using?

SoftRAID should work the same for replacing disks in a RAID volume under all OS X releases.

Again, this is NOT a softraid issue. It's OS disk detection issue. Sorry if that wasn't clear.

When prior OS's detected a disk, it would say 'wow a new disk'. Under High Sierra, it's like "oh, you re-inserted that disk, what are you doing without shutting me down removing and reinserting a disk'.

I continue to have OS disk detection issues even though the hardware is inserted and working fine. It's random. if I shutdown completely and power back on, the system sees them fine. If I do ANYTHING, I mean ANYTHING when the system is running, HS gets lost with what is going on with the disk and the next time I reboot, the RAID loses disks.

I have a 2009 Mac Pro using internal disks with onboard controllers.... None of this did this under Sierra or El Cap, never once.

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Topic starter Posted : 26/12/2017 2:49 pm
(@softraid-support)
Member Admin

Are these internal disks, or are they on a third party SATA card?

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Posted : 27/12/2017 1:23 pm
(@tmuller)
Active Member Customer

Are these internal disks, or are they on a third party SATA card?

These are disks that are internal to the chassis. I have 3 4TB disks in the apple disk slots inside my MacPro with 1 slot open. I use these in a 3 disk raid5 configuration and it consistently never sees them after a reboot, a shutdown seems to work fine.

Under Sierra (not High), this was NEVER the case.

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Topic starter Posted : 23/01/2018 11:21 pm
(@softraid-support)
Member Admin

This is a hardware issue.

It would surprise me if you went back to Sierra and saw different behavior, but it might help point to the cause (and a possible solution)

I had a user point me to something a year ago, but cannot find his email, unfortunately. Before his email, I thought it was the power supply on the Mac Pro sending less current (wearing out, slowly).

But this could be caused by a graphics card issue also, and I am still looking for that information.

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Posted : 25/01/2018 8:46 pm
(@tmuller)
Active Member Customer

This is a hardware issue.

It would surprise me if you went back to Sierra and saw different behavior, but it might help point to the cause (and a possible solution)

I had a user point me to something a year ago, but cannot find his email, unfortunately. Before his email, I thought it was the power supply on the Mac Pro sending less current (wearing out, slowly).

But this could be caused by a graphics card issue also, and I am still looking for that information.

Are soft raid disks created from 5.6.4 supported under the Sierra based 5.6.2 driver version? I can test this under Sierra as I have a disk that I have duplicated some time ago that still has the Sierra OS on it with my last OS update before High Sierra was upgraded.

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Topic starter Posted : 29/01/2018 12:42 am
(@softraid-support)
Member Admin

Yes, a SoftRAID disk created on any Mac OS system from 10.6.8 forward will automatically mount under any other OS. There have not been any partition map changes to SoftRAID disks in a long time.

So yes, please try it.

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Posted : 29/01/2018 10:09 am
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