Hello there!

PN: MMCGS64GSDSM-TO Manufactured: 1808

fdisk -l /dev/sdc Disk /dev/sdc: 60 GiB, 64424509440 bytes, 125829120 sectors Units: sectors of 1 * 512 = 512 bytes Sector size (logical/physical): 512 bytes / 512 bytes I/O size (minimum/optimal): 512 bytes / 512 bytes Disklabel type: dos Disk identifier: 0x00000000

Eszköz Indítható Start Vége Szektorok Size Id Típus /dev/sdc1 32768 125829119 125796352 60G 7 HPFS/NTFS/exFAT

tested on a orangepi flashbench -a -b 1024 -c 128 /dev/mmcblk1 sched_setscheduler: Operation not permitted align 17179869184 pre 1.21ms on 1.28ms post 1.11ms diff 125µs align 8589934592 pre 1.14ms on 1.28ms post 1.1ms diff 157µs align 4294967296 pre 1.21ms on 1.34ms post 881µs diff 290µs align 2147483648 pre 1.18ms on 1.4ms post 870µs diff 373µs align 1073741824 pre 979µs on 1.4ms post 1.03ms diff 400µs align 536870912 pre 958µs on 1.25ms post 1.11ms diff 210µs align 268435456 pre 889µs on 1.24ms post 1.11ms diff 243µs align 134217728 pre 962µs on 1.11ms post 1.11ms diff 69µs align 67108864 pre 1.02ms on 1.1ms post 1.12ms diff 28.7µs align 33554432 pre 1.02ms on 1.1ms post 1.14ms diff 20.1µs align 16777216 pre 1.02ms on 1.25ms post 938µs diff 275µs align 8388608 pre 1.02ms on 1.25ms post 893µs diff 288µs align 4194304 pre 940µs on 1.16ms post 1.06ms diff 158µs align 2097152 pre 945µs on 1.18ms post 1.04ms diff 187µs align 1048576 pre 949µs on 1.17ms post 1.1ms diff 141µs align 524288 pre 949µs on 1.17ms post 1.03ms diff 179µs align 262144 pre 951µs on 1.16ms post 1.04ms diff 164µs align 131072 pre 1.03ms on 1.17ms post 1.04ms diff 132µs align 65536 pre 940µs on 1.17ms post 1.03ms diff 184µs align 32768 pre 946µs on 1.17ms post 1.03ms diff 183µs align 16384 pre 953µs on 1.24ms post 1.08ms diff 219µs align 8192 pre 944µs on 934µs post 935µs diff -5440ns align 4096 pre 958µs on 964µs post 949µs diff 10.2µs align 2048 pre 982µs on 986µs post 981µs diff 4.08µs

Probably 8K block and 16MB erase size.

Balazs