[Hidden-tech] OSX Booting into recovery mode screwed me up

[Ted Trobaugh]

Hey,

I am using OS 13 Ventura.  I do not understand AFPS and how the two
partitions/drives, System and Data, interact.  I don't even know the
nomenclature.  What I *think* I understand is that the physical harddrive
is a Fusion Drive, and that the system is stored in the NAND part and the
data files are stored on the spinning mechanical disk, but I am not
confident of that.  At least you now know what I don't know.

I was investigating creating a disk image of my boot drive (as I was able
to do with HFS+), so I booted into Internet Recovery Mode with the
intention of using Disk Utility.  I discovered that I could not do what I
wanted, so I restarted.  Note: I did nothing while in Recovery Mode -- no
first aid, nothing; all I did was 1) go Disk Utility > File > New Image, 2)
saw that "Image from Drive" was greyed out, 3) Restarted.

Now my machine won't boot.  Verbose Mode tells me that there seems to be an
I/O error with disk2s1 -- I get cyclical "NCQ error caused by queued
command" and "non-NCQ error."

disk2 is not my boot drive; it is a disk image.  I wonder if it is the disk
image that was built when I went into recovery mode.

When in recovery mode I specified what boot drive I wanted to use -- only
my real and true boot drive was listed.  I have no other peripherals
attached - only my keyboard - and I continue to get the error.  Holding
down the Alt/Option key does not give me the Startup Manager.

I have tried using target mode to figure out was is going on, but the host
machine (Sonoma) tells me that my Thunderbolt cable is not actually a
Thunderbolt cable, so the Target disk won't mount.

I look forward to any help you can give me.

Thanks,
Ted




Ted Trobaugh
Dolce Music and Audio
www.dolcemusic.com
413-345-5114
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