[Google Pixel 7a] melgar:
that´s the part of the logfile where the error occured.

Bootloader Version...: lynx-1.0-9894666
Baseband Version.....: g5300g-230323-230525-B-10200345
Serial Number........: REDACTED
--------------------------------------------
extracting android-info.txt (0 MB) to RAM...
Checking 'product' OKAY [ 0.016s]
Checking 'version-bootloader' OKAY [ 0.000s]
Checking 'version-baseband' OKAY [ 0.000s]
Setting current slot to 'a' OKAY [ 0.081s]
extracting boot.img (64 MB) to disk... took 0.409s
archive does not contain 'boot.sig'
Sending 'boot_a' (65536 KB) OKAY [ 0.526s]
Writing 'boot_a' OKAY [ 0.095s]
extracting init_boot.img (8 MB) to disk... took 0.080s
archive does not contain 'init_boot.sig'
Sending 'init_boot_a' (8192 KB) OKAY [ 0.065s]
Writing 'init_boot_a' OKAY [ 0.015s]
extracting dtbo.img (16 MB) to disk... took 0.055s
archive does not contain 'dtbo.sig'
Sending 'dtbo_a' (16384 KB) OKAY [ 0.135s]
Writing 'dtbo_a' OKAY [ 0.030s]
archive does not contain 'dt.img'
extracting pvmfw.img (1 MB) to disk... took 0.010s
archive does not contain 'pvmfw.sig'
Sending 'pvmfw_a' (1024 KB) OKAY [ 0.010s]
Writing 'pvmfw_a' OKAY [ 0.005s]
archive does not contain 'recovery.img'
extracting vbmeta.img (0 MB) to disk... took 0.005s
archive does not contain 'vbmeta.sig'
Sending 'vbmeta_a' (12 KB) OKAY [ 0.000s]
Writing 'vbmeta_a' OKAY [ 0.000s]
extracting vbmeta_system.img (0 MB) to disk... took 0.010s
archive does not contain 'vbmeta_system.sig'
Sending 'vbmeta_system_a' (4 KB) OKAY [ 0.000s]
Writing 'vbmeta_system_a' OKAY [ 0.000s]
extracting vbmeta_vendor.img (0 MB) to disk... took 0.000s
archive does not contain 'vbmeta_vendor.sig'
Sending 'vbmeta_vendor_a' (4 KB) OKAY [ 0.000s]
Writing 'vbmeta_vendor_a' OKAY [ 0.000s]
extracting vendor_boot.img (64 MB) to disk... took 0.349s
archive does not contain 'vendor_boot.sig'
Sending 'vendor_boot_a' (65536 KB) OKAY [ 0.554s]
Writing 'vendor_boot_a' OKAY [ 0.085s]
extracting vendor_kernel_boot.img (64 MB) to disk... took 0.187s
archive does not contain 'vendor_kernel_boot.sig'
Sending 'vendor_kernel_boot_a' (65536 KB) OKAY [ 0.551s]
Writing 'vendor_kernel_boot_a' OKAY [ 0.100s]
extracting boot.img (64 MB) to disk... took 0.270s
archive does not contain 'boot.sig'
Sending 'boot_a' (65536 KB) OKAY [ 0.586s]
Writing 'boot_a' OKAY [ 0.100s]
extracting init_boot.img (8 MB) to disk... took 0.053s
archive does not contain 'init_boot.sig'
Sending 'init_boot_a' (8192 KB) OKAY [ 0.063s]
Writing 'init_boot_a' OKAY [ 0.016s]
extracting dtbo.img (16 MB) to disk... took 0.107s
archive does not contain 'dtbo.sig'
Sending 'dtbo_a' (16384 KB) OKAY [ 0.132s]
Writing 'dtbo_a' OKAY [ 0.016s]
archive does not contain 'dt.img'
extracting pvmfw.img (1 MB) to disk... took 0.000s
archive does not contain 'pvmfw.sig'
Sending 'pvmfw_a' (1024 KB) OKAY [ 0.000s]
Writing 'pvmfw_a' OKAY [ 0.000s]
archive does not contain 'recovery.img'
extracting vbmeta.img (0 MB) to disk... took 0.000s
archive does not contain 'vbmeta.sig'
Sending 'vbmeta_a' (12 KB) OKAY [ 0.000s]
Writing 'vbmeta_a' OKAY [ 0.000s]
extracting vbmeta_system.img (0 MB) to disk... took 0.000s
archive does not contain 'vbmeta_system.sig'
Sending 'vbmeta_system_a' (4 KB) OKAY [ 0.016s]
Writing 'vbmeta_system_a' OKAY [ 0.000s]
extracting vbmeta_vendor.img (0 MB) to disk... took 0.000s
archive does not contain 'vbmeta_vendor.sig'
Sending 'vbmeta_vendor_a' (4 KB) OKAY [ 0.000s]
Writing 'vbmeta_vendor_a' OKAY [ 0.000s]
extracting vendor_boot.img (64 MB) to disk... took 0.247s
archive does not contain 'vendor_boot.sig'
Sending 'vendor_boot_a' (65536 KB) OKAY [ 0.524s]
Writing 'vendor_boot_a' OKAY [ 0.100s]
extracting vendor_kernel_boot.img (64 MB) to disk... took 0.285s
archive does not contain 'vendor_kernel_boot.sig'
Sending 'vendor_kernel_boot_a' (65536 KB) OKAY [ 0.486s]
Writing 'vendor_kernel_boot_a' OKAY [ 0.078s]
extracting super_empty.img (0 MB) to disk... took 0.000s
extracting product.img (2975 MB) to disk... took 34.001s
extracting system.img (838 MB) to disk... took 13.005s
extracting system_dlkm.img (0 MB) to disk... took 0.016s
extracting system_ext.img (367 MB) to disk... took 6.702s
extracting system_other.img (25 MB) to disk... took 0.285s
extracting vendor.img (624 MB) to disk... took 11.431s
extracting vendor_dlkm.img (49 MB) to disk... took 0.670s
archive does not contain 'vendor_other.img'
archive does not contain 'vendor_other.img'
Sending sparse 'super' 1/20 (254972 KB) OKAY [ 2.992s]
Writing 'super' OKAY [ 0.385s]
Sending sparse 'super' 2/20 (254972 KB) OKAY [ 2.939s]
Writing 'super' OKAY [ 0.423s]
Sending sparse 'super' 3/20 (254972 KB) OKAY [ 2.985s]
Writing 'super' OKAY [ 0.423s]
Sending sparse 'super' 4/20 (254972 KB) OKAY [ 2.970s]
Writing 'super' OKAY [ 0.432s]
Sending sparse 'super' 5/20 (254972 KB) OKAY [ 3.015s]
Writing 'super' OKAY [ 0.416s]
Sending sparse 'super' 6/20 (254972 KB) OKAY [ 3.070s]
Writing 'super' OKAY [ 0.423s]
Sending sparse 'super' 7/20 (254972 KB) OKAY [ 3.271s]
Writing 'super' OKAY [ 0.417s]
Sending sparse 'super' 8/20 (254972 KB) OKAY [ 3.046s]
Writing 'super' OKAY [ 0.432s]
Sending sparse 'super' 9/20 (254972 KB) OKAY [ 3.123s]
Writing 'super' OKAY [ 0.439s]
Sending sparse 'super' 10/20 (254972 KB) OKAY [ 3.054s]
Writing 'super' OKAY [ 0.435s]
Sending sparse 'super' 11/20 (254972 KB) FAILED (Error reading sparse file)
fastboot: error: Command failed
[liblp] Partition product_a will resize from 0 bytes to 3120017408 bytes
[liblp] Partition system_a will resize from 0 bytes to 879353856 bytes
[liblp] Partition system_dlkm_a will resize from 0 bytes to 348160 bytes
[liblp] Partition system_ext_a will resize from 0 bytes to 385024000 bytes
[liblp] Partition system_b will resize from 0 bytes to 27111424 bytes
[liblp] Partition vendor_a will resize from 0 bytes to 655204352 bytes
[liblp] Partition vendor_dlkm_a will resize from 0 bytes to 51466240 bytes
rebooting to bootloader ...
Rebooting into bootloader FAILED (Write to device failed (no link))
fastboot: error: Command failed
Sleeping 5-10 seconds ...
flashing pf_boot ...
Warning: skip copying init_boot image avb footer (init_boot partition size: 0, init_boot image size: 8388608).
Sending 'init_boot' (8192 KB) FAILED (Write to device failed (no link))
fastboot: error: Command failed
rebooting to system ...
Rebooting FAILED (Write to device failed (no link))
fastboot: error: Command failed
2023-09-20 18:25:23 Done!
Flashing elapsed time: 209 seconds