[OnePlus 8T Guides, News, & Discussion] rollex:
I have similar output:

```

C:\Users\Rolle\Downloads\OnePlus8TOxygen_15.E.28_OTA_0280_all_2107310147_ddcd_Fastboot-ROM>flash-all.bat

##################################################

# Oxygen OS Flasher For OnePlus 8T by HELLBOY017 #

##################################################

#######################

# Formatting userdata #

#######################

F2FS-tools: mkfs.f2fs Ver: 1.14.0 (2020-08-24)

Info: Disable heap-based policy

Info: Debug level = 1

Info: Trim is disabled

Info: Set conf for android

Info: Segments per section = 1

Info: Sections per zone = 1

Info: sector size = 512

Info: total sectors = 220798680 (107811 MB)

Info: zone aligned segment0 blkaddr: 512

Info: add quota type = 0 => 4

Info: add quota type = 1 => 5

[f2fs_init_sit_area: 587] Filling sit area at offset 0x00600000

[f2fs_init_nat_area: 621] Filling nat area at offset 0x00e00000

[f2fs_write_root_inode:1210] Writing root inode (hot node), 1ca00 0 200 at offset 0x00117248

[f2fs_write_default_quota:1286] Writing quota data, at offset 0001d001, 0001d002

[f2fs_write_qf_inode:1377] Writing quota inode (hot node), 1ca00 0 200 at offset 0x00117249

[f2fs_write_default_quota:1286] Writing quota data, at offset 0001d003, 0001d004

[f2fs_write_qf_inode:1377] Writing quota inode (hot node), 1ca00 0 200 at offset 0x00117250

[f2fs_update_nat_root:1431] Writing nat root, at offset 0x00000e00

[f2fs_add_default_dentry_root:1628] Writing default dentry root, at offset 0x0001d000

Info: Overprovision ratio = 0.610%

Info: Overprovision segments = 660 (GC reserved = 335)

[f2fs_write_check_point_pack: 774] Writing main segments, cp at offset 0x00000200

[f2fs_write_check_point_pack: 911] Writing Segment summary for HOT/WARM/COLD_DATA, at offset 0x00000201

[f2fs_write_check_point_pack: 938] Writing Segment summary for HOT_NODE, at offset 0x00000202

[f2fs_write_check_point_pack: 950] Writing Segment summary for WARM_NODE, at offset 0x00000203

[f2fs_write_check_point_pack: 961] Writing Segment summary for COLD_NODE, at offset 0x00000204

[f2fs_write_check_point_pack: 969] Writing cp page2, at offset 0x00000205

[f2fs_write_check_point_pack: 989] Writing NAT bits pages, at offset 0x000003fe

[f2fs_write_check_point_pack:1010] Writing cp page 1 of checkpoint pack 2, at offset 0x00000400

[f2fs_write_check_point_pack:1029] Writing cp page 2 of checkpoint pack 2, at offset 0x00000405

[f2fs_write_super_block:1062] Writing super block, at offset 0x00000000

Info: format successful

Sending 'userdata' (85 KB) OKAY [ 0.008s]

Writing 'userdata' OKAY [ 0.016s]

Finished. Total time: 0.527s

Erasing 'userdata' OKAY [ 0.208s]

F2FS-tools: mkfs.f2fs Ver: 1.14.0 (2020-08-24)

Info: Disable heap-based policy

Info: Debug level = 1

Info: Trim is disabled

Info: Set conf for android

Info: Segments per section = 1

Info: Sections per zone = 1

Info: sector size = 512

Info: total sectors = 220798680 (107811 MB)

Info: zone aligned segment0 blkaddr: 512

Info: add quota type = 0 => 4

Info: add quota type = 1 => 5

[f2fs_init_sit_area: 587] Filling sit area at offset 0x00600000

[f2fs_init_nat_area: 621] Filling nat area at offset 0x00e00000

[f2fs_write_root_inode:1210] Writing root inode (hot node), 1ca00 0 200 at offset 0x00117248

[f2fs_write_default_quota:1286] Writing quota data, at offset 0001d001, 0001d002

[f2fs_write_qf_inode:1377] Writing quota inode (hot node), 1ca00 0 200 at offset 0x00117249

[f2fs_write_default_quota:1286] Writing quota data, at offset 0001d003, 0001d004

[f2fs_write_qf_inode:1377] Writing quota inode (hot node), 1ca00 0 200 at offset 0x00117250

[f2fs_update_nat_root:1431] Writing nat root, at offset 0x00000e00

[f2fs_add_default_dentry_root:1628] Writing default dentry root, at offset 0x0001d000

Info: Overprovision ratio = 0.610%

Info: Overprovision segments = 660 (GC reserved = 335)

[f2fs_write_check_point_pack: 774] Writing main segments, cp at offset 0x00000200

[f2fs_write_check_point_pack: 911] Writing Segment summary for HOT/WARM/COLD_DATA, at offset 0x00000201

[f2fs_write_check_point_pack: 938] Writing Segment summary for HOT_NODE, at offset 0x00000202

[f2fs_write_check_point_pack: 950] Writing Segment summary for WARM_NODE, at offset 0x00000203

[f2fs_write_check_point_pack: 961] Writing Segment summary for COLD_NODE, at offset 0x00000204

[f2fs_write_check_point_pack: 969] Writing cp page2, at offset 0x00000205

[f2fs_write_check_point_pack: 989] Writing NAT bits pages, at offset 0x000003fe

[f2fs_write_check_point_pack:1010] Writing cp page 1 of checkpoint pack 2, at offset 0x00000400

[f2fs_write_check_point_pack:1029] Writing cp page 2 of checkpoint pack 2, at offset 0x00000405

[f2fs_write_super_block:1062] Writing super block, at offset 0x00000000

Info: format successful

Sending 'userdata' (85 KB) OKAY [ 0.009s]

Writing 'userdata' OKAY [ 0.016s]

Erasing 'metadata' OKAY [ 0.015s]

Erase successful, but not automatically formatting.

File system type raw not supported.

Finished. Total time: 9.668s

###########################

# Flashing recovery image #

###########################

Sending 'recovery' (102400 KB) OKAY [ 2.496s]

Writing 'recovery' OKAY [ 0.424s]

Finished. Total time: 2.973s

##########################

# Rebooting to fastbootd #

##########################

Rebooting into fastboot OKAY [ 0.003s]

< waiting for any device >

fastboot: error: Failed to boot into userspace fastboot; one or more components might be unbootable.

Do you have DDR5 variant [Y,N]?N

fastboot: error: Could not check if partition xbl has slot all

fastboot: error: Could not check if partition xbl_config has slot all

Sending 'boot_b' (98304 KB) OKAY [ 2.260s]

Writing 'boot_b' OKAY [ 0.296s]

Finished. Total time: 2.906s

Sending 'dtbo' (8192 KB) OKAY [ 0.207s]

Writing 'dtbo' OKAY [ 0.029s]

Finished. Total time: 0.286s

fastboot: error: Could not check if partition abl has slot all

fastboot: error: Could not check if partition aop has slot all

fastboot: error: Could not check if partition bluetooth has slot all

fastboot: error: Could not check if partition cmnlib64 has slot all

fastboot: error: Could not check if partition cmnlib has slot all

fastboot: error: Could not check if partition devcfg has slot all

fastboot: error: Could not check if partition dsp has slot all

fastboot: error: Could not check if partition featenabler has slot all

fastboot: error: Could not check if partition hyp has slot all

fastboot: error: Could not check if partition imagefv has slot all

fastboot: error: Could not check if partition keymaster has slot all

fastboot: error: Could not check if partition logo has slot all

fastboot: error: Could not check if partition mdm_oem_stanvbk has slot all

Sending 'modem_a' (240188 KB) OKAY [ 5.846s]

Writing 'modem_a' OKAY [ 0.806s]

Sending 'modem_b' (240188 KB) OKAY [ 5.536s]

Writing 'modem_b' OKAY [ 0.982s]

Finished. Total time: 13.322s

fastboot: error: Could not check if partition multiimgoem has slot all

fastboot: error: Could not check if partition qupfw has slot all

fastboot: error: Could not check if partition spunvm has slot all

fastboot: error: Could not check if partition storsec has slot all

fastboot: error: Could not check if partition tz has slot all

fastboot: error: Could not check if partition uefisecapp has slot all

fastboot: error: Could not check if partition reserve has slot all

Sending 'vbmeta' (8 KB) OKAY [ 0.008s]

Writing 'vbmeta' OKAY [ 0.002s]

Finished. Total time: 0.062s

Sending 'vbmeta_system' (4 KB) OKAY [ 0.003s]

Writing 'vbmeta_system' OKAY [ 0.002s]

Finished. Total time: 0.057s

###############################

# Resizing logical partitions #

###############################

Deleting 'odm_a' FAILED (remote: 'unknown command')

fastboot: error: Command failed

Deleting 'odm_b' FAILED (remote: 'unknown command')

fastboot: error: Command failed

Deleting 'system_a' FAILED (remote: 'unknown command')

fastboot: error: Command failed

Deleting 'system_b' FAILED (remote: 'unknown command')

fastboot: error: Command failed

Deleting 'system_ext_a' FAILED (remote: 'unknown command')

fastboot: error: Command failed

Deleting 'system_ext_b' FAILED (remote: 'unknown command')

fastboot: error: Command failed

Deleting 'product_a' FAILED (remote: 'unknown command')

fastboot: error: Command failed

Deleting 'product_b' FAILED (remote: 'unknown command')

fastboot: error: Command failed

Deleting 'vendor_a' FAILED (remote: 'unknown command')

fastboot: error: Command failed

Deleting 'vendor_b' FAILED (remote: 'unknown command')

fastboot: error: Command failed

Creating 'odm_a' FAILED (remote: 'unknown command')

fastboot: error: Command failed

Creating 'odm_b' FAILED (remote: 'unknown command')

fastboot: error: Command failed

Creating 'system_a' FAILED (remote: 'unknown command')

fastboot: error: Command failed

Creating 'system_b' FAILED (remote: 'unknown command')

fastboot: error: Command failed

Creating 'system_ext_a' FAILED (remote: 'unknown command')

fastboot: error: Command failed

Creating 'system_ext_b' FAILED (remote: 'unknown command')

fastboot: error: Command failed

Creating 'product_a' FAILED (remote: 'unknown command')

fastboot: error: Command failed

Creating 'product_b' FAILED (remote: 'unknown command')

fastboot: error: Command failed

Creating 'vendor_a' FAILED (remote: 'unknown command')

fastboot: error: Command failed

Creating 'vendor_b' FAILED (remote: 'unknown command')

fastboot: error: Command failed

###############################

# Flashing logical partitions #

###############################

Sending 'odm' (34544 KB) OKAY [ 0.846s]

Writing 'odm' FAILED (remote: '(odm_b) No such partition')

fastboot: error: Command failed

Invalid sparse file format at header magic

Sending sparse 'system' 1/2 (786296 KB) OKAY [ 18.126s]

Writing 'system' FAILED (remote: 'Partition not found')

fastboot: error: Command failed

Invalid sparse file format at header magic

Sending sparse 'system_ext' 1/2 (786356 KB) OKAY [ 18.112s]

Writing 'system_ext' FAILED (remote: 'Partition not found')

fastboot: error: Command failed

Invalid sparse file format at header magic

Sending sparse 'product' 1/2 (786368 KB) OKAY [ 18.120s]

Writing 'product' FAILED (remote: 'Partition not found')

fastboot: error: Command failed

Invalid sparse file format at header magic

Sending sparse 'vendor' 1/2 (786241 KB) OKAY [ 18.108s]

Writing 'vendor' FAILED (remote: 'Partition not found')

fastboot: error: Command failed

#######################

# Rebooting to system #

#######################

Rebooting OKAY [ 0.001s]

Finished. Total time: 0.002s

Press any key to continue . . .

```

"FAILED (remote: 'Partition not found')" all along. Not booting.

What caused me to try this is couple hours of googling... I tried to flash twrp and accidentally flashed it to recovery.img and got "the current image(boot/recovery) have been destroyed and can not boot." I have been stuck in fastboot mode every since. For some reason MSM tool doesn't work for me, it just won't recognize.

This was my last hope... will spend the next hours googling unless someone has any idea on how to resolve.