[Google Pixel XL Questions & Answers] Danish Fayaz:
I've ran this multiple times on multiple stock images (8.0, 8.1, 9.0), (Bootloader is unlocked on fastboot mode but in developer area it shows greyd out )

But after flashing, I reboot and see my old rom booting up. Can anyone tell me why is it not flashing?

My output

sudo ./flash-all.sh

Sending 'bootloader_a' (32248 KB) OKAY [ 1.111s]

Writing 'bootloader_a' (bootloader) Valid bootloader version.

(bootloader) Flashing active slot "_a"

(bootloader) Flashing active slot "_a"

OKAY [ 2.041s]

Finished. Total time: 3.274s

rebooting into bootloader OKAY [ 0.007s]

Finished. Total time: 0.058s

< waiting for any device >

Sending 'radio_a' (57272 KB) OKAY [ 2.063s]

Writing 'radio_a' OKAY [ 0.489s]

Finished. Total time: 2.683s

rebooting into bootloader OKAY [ 0.008s]

Finished. Total time: 0.058s

extracting android-info.txt (0 MB) to RAM...

--------------------------------------------

Bootloader Version...: 8996-012001-1709121620

Baseband Version.....: 8996-013053-1706271859

Serial Number........: HT6A10203511

--------------------------------------------

Checking product OKAY [ 0.050s]

Checking version-bootloader OKAY [ 0.050s]

Checking version-baseband OKAY [ 0.050s]

extracting boot.img (29 MB) to disk... took 0.156s

archive does not contain 'boot.sig'

archive does not contain 'boot_other.img'

archive does not contain 'dtbo.img'

archive does not contain 'dt.img'

archive does not contain 'odm.img'

archive does not contain 'product.img'

archive does not contain 'recovery.img'

extracting system.img (1808 MB) to disk... took 37.338s

archive does not contain 'system.sig'

extracting system_other.img (780 MB) to disk... took 16.314s

archive does not contain 'system.sig'

archive does not contain 'vbmeta.img'

extracting vendor.img (251 MB) to disk... took 1.702s

archive does not contain 'vendor.sig'

archive does not contain 'vendor_other.img'

/home/danish/Downloads/marlin-opr3.170623.013/mke2fs failed with status 1

fastboot: error: Cannot generate image for userdata

~/Downloads/marlin-opr3.170623.013 took 1m 20s

➜ sudo ./fastboot --set-active=other

Setting current slot to 'b' OKAY [ 0.101s]

Finished. Total time: 0.184s

~/Downloads/marlin-opr3.170623.013

➜ sudo ./flash-all.sh

Sending 'bootloader_b' (32248 KB) OKAY [ 1.352s]

Writing 'bootloader_b' (bootloader) Valid bootloader version.

(bootloader) Flashing active slot "_b"

(bootloader) Flashing active slot "_b"

OKAY [ 1.760s]

Finished. Total time: 3.221s

rebooting into bootloader OKAY [ 0.036s]

Finished. Total time: 0.086s

Sending 'radio_b' (57272 KB) OKAY [ 2.303s]

Writing 'radio_b' OKAY [ 0.499s]

Finished. Total time: 2.940s

rebooting into bootloader OKAY [ 0.010s]

Finished. Total time: 0.060s

extracting android-info.txt (0 MB) to RAM...

--------------------------------------------

Bootloader Version...: 8996-012001-1709121620

Baseband Version.....: 8996-013053-1706271859

Serial Number........: HT6A10203511

--------------------------------------------

Checking product OKAY [ 0.050s]

Checking version-bootloader OKAY [ 0.050s]

Checking version-baseband OKAY [ 0.050s]

extracting boot.img (29 MB) to disk... took 0.215s

archive does not contain 'boot.sig'

archive does not contain 'boot_other.img'

archive does not contain 'dtbo.img'

archive does not contain 'dt.img'

archive does not contain 'odm.img'

archive does not contain 'product.img'

archive does not contain 'recovery.img'

extracting system.img (1808 MB) to disk... took 29.163s

archive does not contain 'system.sig'

extracting system_other.img (780 MB) to disk... took 23.849s

archive does not contain 'system.sig'

archive does not contain 'vbmeta.img'

extracting vendor.img (251 MB) to disk... took 2.097s

archive does not contain 'vendor.sig'

archive does not contain 'vendor_other.img'

/home/danish/Downloads/marlin-opr3.170623.013/mke2fs failed with status 1

fastboot: error: Cannot generate image for userdata