[Xperia Z3 Q&A, Help & Troubleshooting] nailyk:
[MENTION=7006025]BigCountry907[/MENTION]

I made some more SD experiments:

After rebuilding the lk (aboot) from the patched sources (doesn't looks good for 8974 btw) I got the exact same result:

Format: Log Type - Time(microsec) - Message
Log type: B - since boot(excluding boot rom). D - delta
B - 288804 - SBL1, Start
B - 294050 - scatterload_region && ram_init, Start
D - 0 - scatterload_region && ram_init, Delta
B - 311008 - pm_device_init, Start
D - 27541 - pm_device_init, Delta
B - 338702 - boot_flash_init, Start
D - 391437 - boot_flash_init, Delta
B - 730475 - boot_config_data_table_init, Start
D - 0 - boot_config_data_table_init, Delta
B - 736636 - PBS setup, Start
D - 1128 - PBS setup, Delta
B - 742492 - sbl1_ddr_set_params, Start
B - 747006 - Pre_DDR_clock_init, Start
D - 274 - Pre_DDR_clock_init, Delta
D - 0 - sbl1_ddr_set_params, Delta
B - 760426 - pm_driver_init, Start
D - 37393 - pm_driver_init, Delta
B - 798307 - clock_init, Start
D - 183 - clock_init, Delta
B - 801387 - Image Load, Star

So I wonder if that sdcard partition is read and get a bit angry:

% dd if=/dev/urandom of=/dev/sdf1
% dd if=/dev/urandom of=/dev/sdf7

and the output was:

Format: Log Type - Time(microsec) - Message
Log type: B - since boot(excluding boot rom). D - delta
B - 289231 - SBL1, Start
B - 294508 - scatterload_region && ram_init, Start
D - 0 - scatterload_region && ram_init, Delta
B - 311466 - pm_device_init, Start
D - 27450 - pm_device_init, Delta
B - 339099 - boot_flash_init, Start
D - 391162 - boot_flash_init, Delta
B - 730597 - boot_config_data_table_init, Start
D - 0 - boot_config_data_table_init, Delta
B - 736758 - PBS setup, Start
D - 1128 - PBS setup, Delta
B - 742614 - sbl1_ddr_set_params, Start
B - 747128 - Pre_DDR_clock_init, Start
D - 274 - Pre_DDR_clock_init, Delta
D - 0 - sbl1_ddr_set_params, Delta
B - 760548 - pm_driver_init, Start
D - 37393 - pm_driver_init, Delta
B - 798429 - clock_init, Start
D - 183 - clock_init, Delta
B - 801509 - Image Load, Star

No changes at all.

We know the sdcard had an effect because boot time are doubled. However something else is missing. Could it be into the GPT?

Without sd:

Format: Log Type - Time(microsec) - Message
Log type: B - since boot(excluding boot rom). D - delta
B - 249185 - SBL1, Start
B - 253699 - scatterload_region && ram_init, Start
D - 0 - scatterload_region && ram_init, Delta
B - 268278 - pm_device_init, Start
D - 27175 - pm_device_init, Delta
B - 295636 - boot_flash_init, Start
D - [COLOR="Orange"]14975[/COLOR] - boot_flash_init, Delta
B - [COLOR="orange"]310947[/COLOR] - boot_config_data_table_init, Start
D - 0 - boot_config_data_table_init, Delta
B - [COLOR="orange"]317108[/COLOR] - PBS setup, Start
D - 1128 - PBS setup, Delta
B - [COLOR="orange"]322964[/COLOR] - sbl1_ddr_set_params, Start
B - [COLOR="orange"]327478[/COLOR] - Pre_DDR_clock_init, Start
D - 244 - Pre_DDR_clock_init, Delta
D - 0 - sbl1_ddr_set_params, Delta
B - [COLOR="orange"]340959[/COLOR] - pm_driver_init, Start
D - 37423 - pm_driver_init, Delta
B - [COLOR="orange"]378749[/COLOR] - clock_init, Start
D - 152 - clock_init, Delta
B - [COLOR="orange"]381860[/COLOR] - Image Load, Sta2

My guess is, for now, the device still boot the emmc first s1.