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Date:      Tue, 12 Mar 2019 16:20:38 -0700
From:      bob prohaska <fbsd@www.zefox.net>
To:        freebsd-arm@freebsd.org
Subject:   Can't read GPT header on rpi3
Message-ID:  <20190312232038.GA2084@www.zefox.net>

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When rebooting an rpi3 running -current as of a couple days ago 
the console sometimes reports

Scanning disk mmc@7e300000.blk...
Scanning disk usb_mass_storage.lun0...
*** ERROR: Can't read GPT header ***
part_get_info_efi: *** ERROR: Invalid GPT ***
*** ERROR: Can't read GPT header ***
part_get_info_efi: *** ERROR: Invalid Backup GPT ***
*** ERROR: Can't read GPT header ***
part_get_info_efi: *** ERROR: Invalid GPT ***
*** ERROR: Can't read GPT header ***

and gets stuck in the loop. Power-cycling the Pi3 seems
to clear the difficulty. The microSD card is relatively 
new, a Samsung Evo + 128GB. 

It's only happened about three times, so statistics are
somewhat lacking. If anybody's got a suggestion for things
to check please do.

Thanks for reading,

bob prohaska
 



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