Don’t format a drive of M1 Macs from recovery mode

Re:Don’t format a drive of M1 Macs from recovery mode by sillysaurusx on Thursday February 18, 2021 @03:52AM (#26177507)

You'd likely brick your mac if you don't do it the anointed way.

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Re:Don’t format a drive of M1 Macs from recovery mode by my123 on Thursday February 18, 2021 @04:02AM (#26177573)

As long as you don't shoot yourself in the foot by touching other NVMe namespaces (and even that should be recoverable) and the SPI flash onboard, things can be restorable through DFU.

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Re:Don’t format a drive of M1 Macs from recovery mode by wtallis on Thursday February 18, 2021 @06:38AM (#26178670)

While it would make a lot of sense for Apple to use NVMe namespaces in this manner, it appears from information posted elsewhere in this thread by marcan_42 that Apple is not doing so, and is just using regular GPT partitions within a single NVMe namespace to store the stuff that isn't on the motherboard's NOR flash.

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Re:Don’t format a drive of M1 Macs from recovery mode by my123 on Thursday February 18, 2021 @07:15AM (#26178950)

I can tell you that devices with Apple CPUs _do_ have multiple NVMe namespaces.

The recovery OS and 1TR are not data needed to be saved permanently (as in serial number and such, without which you cannot restore the device), you can recover them through DFU.

Data critical for being able to restore is in the SPI flash. (and it's assumed that some of it might be in other NVMe namespaces too)

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