Question Why is fastboot giving me this error when I try and wipe my pixel?

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New member
Feb 7, 2023
Hi everyone. I am trying to wipe my pixel 6, as I want to install a custom rom.
When trying to wipe, this happens.

fastboot -w
Erase successful, but not automatically formatting.
File system type raw not supported.
Erase successful, but not automatically formatting.
Can't determine partition type.
FAILED (remote: variable (partition-type:cache) not found)
erasing 'userdata'...
OKAY [ 0.191s]
erasing 'cache'...
FAILED (remote: partition not found)
finished. total time: 0.196s

When trying to flash a bootloader, It gives me this error:

sending 'bootloader' (11506 KB)...
OKAY [ 0.269s]
writing 'bootloader'...
(bootloader) Flashing pack version slider-1.2-8318357
(bootloader) flashing platform gs101
(bootloader) Validating partition ufs
(bootloader) Validating partition ufs
(bootloader) Validating partition partition:0
(bootloader) Validating partition partition:1
(bootloader) Validating partition partition:2
(bootloader) Validating partition partition:3
(bootloader) Validating partition bl1_a
(bootloader) Validating partition pbl_a
(bootloader) failed: invalid rollback counter
(bootloader) image(pbl_a): rejected, fails validation
(bootloader) failed to validate partition (pbl_a)
FAILED (remote: failed to flash partition (bootloader))
finished. total time: 0.347s

I believe these two errors are connected, but I am not sure why this is happening. I am aware google did something regarding preventing bootloader rollback with android 13, and I recall accidentally installing it OTA once and having to rollback to 12.

Strephon Alkhalikoi

Senior Member
Aug 3, 2010
Samsung Galaxy S4
Nexus 6
You flashed Android 13 at some point (the "invalid rollback counter" error). Once Android 13 is installed you cannot install older bootloaders. Period.

The other error? Raw format means no formatting at all. In essence you have a blank drive. You may want to try restoring using Google's flash tool prior to installing your chosen ROM.