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I'm running Vmware ESXi 6.5 on an Xserve 3.1 and due to the power saving settings it puts the internal drives to sleep a short while after boot which prevents ESXi from saving settings.

I've tried booting into OSX and disabling there but the problem persists in ESXi. I've also tried the usual SMC and NVRAM resets.

The symptom is a 'disk timeout' for all internal and FireWire attached drives (same for SSD and HDD) after about 15 minutes.

Any suggestions greatly appreciated.

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    There’s no power setting within the NVRAM that spins down the drives. That’s within VMWare. I’ve installedFreeBSD on these many times and I have never encountered persistent power management settings – Allan Apr 9 at 13:05
  • Thanks @allan. I'm getting disk timeouts in ESXi for all internal drives after 15-20 minutes. I tried FireWire 800 but same issue. I've tried two Xserves with different SATA backplanes and same issue. I'm definitely missing something. – Basic Monkey Apr 9 at 17:07
  • What version of ESXi is running here? – bmike Apr 9 at 17:33
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    @bmike 6.5 with all the latest updates (latest supported version due to CPU age). – Basic Monkey Apr 9 at 20:42

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