[Samsung Galaxy Tab A series Questions & Answers] saznat:
HI TWRP JEDI

Here are the results.

Flash Combination T580XXU4ARJ1

FAILED

Tablet Screen has purple message:

Failed - FRP Enabled - Ignore PIT download

Odin Log

<ID:0/003> Added!!

<ID:0/003> Odin engine v(ID:3.1301)..

<ID:0/003> File analysis..

<ID:0/003> Total Binary size: 1016 M

<ID:0/003> SetupConnection..

<ID:0/003> Initialzation..

<ID:0/003> Set PIT file..

<ID:0/003> DO NOT TURN OFF TARGET!!

<ID:0/003> Get PIT for mapping..

<ID:0/003> Firmware update start..

<ID:0/003> NAND Write Start!!

<ID:0/003> SingleDownload.

<ID:0/003> sboot.bin

<ID:0/003> param.bin

<ID:0/003> cm.bin

<ID:0/003> boot.img

<ID:0/003> recovery.img

<ID:0/003> system.img

<ID:0/003> FAIL!

<ID:0/003>

<ID:0/003> Complete(Write) operation failed.

<OSM> All threads completed. (succeed 0 / failed 1)

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

Reflash Combination ROM again without system.img

Passed

Odin Log

<ID:0/003> Odin engine v(ID:3.1301)..

<ID:0/003> File analysis..

<ID:0/003> Total Binary size: 36 M

<ID:0/003> SetupConnection..

<ID:0/003> Initialzation..

<ID:0/003> Set PIT file..

<ID:0/003> DO NOT TURN OFF TARGET!!

<ID:0/003> Get PIT for mapping..

<ID:0/003> Firmware update start..

<ID:0/003> NAND Write Start!!

<ID:0/003> SingleDownload.

<ID:0/003> boot.img

<ID:0/003> cm.bin

<ID:0/003> modem.bin

<ID:0/003> param.bin

<ID:0/003> recovery.img

<ID:0/003> sboot.bin

<ID:0/003> RQT_CLOSE !!

<ID:0/003> RES OK !!

<ID:0/003> Removed!!

<ID:0/003> Remain Port .... 0

<OSM> All threads completed. (succeed 1 / failed 0)

<ID:0/003> Added!!

As there's no system Tablet has a fatal exception and shows

"KERNEL PANIC UPLOAD MODE" alongside a small android man

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

Flash just system.img from T580XXU4CSA1_BTU

No message on Tablet

FAILED

Odin Log

<ID:0/003> Odin engine v(ID:3.1301)..

<ID:0/003> File analysis..

<ID:0/003> Total Binary size: 1689 M

<ID:0/003> SetupConnection..

<ID:0/003> Initialzation..

<ID:0/003> Get PIT for mapping..

<ID:0/003> Firmware update start..

<ID:0/003> NAND Write Start!!

<ID:0/003> SingleDownload.

<ID:0/003> system.img

<ID:0/003> FAIL!

<ID:0/003>

<ID:0/003> Complete(Write) operation failed.

<OSM> All threads completed. (succeed 0 / failed 1)

Then tried with a different region - T580XXU4CSA1_DBT

Result was the same as T580XXU4CSA1_BTU

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

Flash system.img from T580XXU4CSA1_BTU with the pitfile you linked to.

with repartition option unticked

Message on Tablet:

FRP is enabled, ignore PIT download

FAILED

Odin Log

<ID:0/003> Odin engine v(ID:3.1301)..

<ID:0/003> File analysis..

<ID:0/003> Total Binary size: 1689 M

<ID:0/003> SetupConnection..

<ID:0/003> Initialzation..

<ID:0/003> Get PIT for mapping..

<ID:0/003> Firmware update start..

<ID:0/003> NAND Write Start!!

<ID:0/003> SingleDownload.

<ID:0/003> system.img

<ID:0/003> FAIL!

<ID:0/003>

<ID:0/003> Complete(Write) operation failed.

<OSM> All threads completed. (succeed 0 / failed 1)

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

Thanks again TWRP JEDI, I really appreciate your help here. Unfortunately, I keep thinking of more questions.

If I include system.img.lz4 in the file I flash, I get no message appear on the tablet screen during flashing. But, if

I rename it as system.img I got the following message on the tablet:

"FRP is enabled, not allow download non-FRP SYSTEM binary"

Am I right in assuming that it doesn't matter whether I flash the system.img or system.img.lz4 file type, the problem is actually the same one - FRP preventing flashing of the system binary. Am I right that The only difference is that it only tells tells me about it on the tablet when I flash the system file without the .lz4 extension?

Should I be flashing system.img or system.img.lz4? Should it make any difference?

Are there regional differences in system.img between different firmwares? I thought the regional stuff was in the CSC tar file. Am I right in assuming that system.img is the same in all regional firmwares?

Sorry. So many questions! I'm just confusing myself. It'd be a great help if you can give me any answers.