Hello!
Please look at the result of this card below.
PN: MB-MC32G
Factory alignment 8 MiB.
8K sector and probably 4MiB erase size, however it's TLC.
########
Fdisk
Disk /dev/mmcblk1: 29.8 GiB, 32010928128 bytes, 62521344 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
Device Boot Start End Sectors Size Id Type
/dev/mmcblk1p1 8192 62521343 62513152 29.8G c W95 FAT32 (LBA)
########
flashbench
align 8589934592 pre 429µs on 553µs post 352µs diff 162µs
align 4294967296 pre 425µs on 552µs post 354µs diff 163µs
align 2147483648 pre 433µs on 552µs post 352µs diff 159µs
align 1073741824 pre 432µs on 554µs post 353µs diff 162µs
align 536870912 pre 429µs on 553µs post 353µs diff 162µs
align 268435456 pre 433µs on 554µs post 353µs diff 160µs
align 134217728 pre 433µs on 551µs post 354µs diff 158µs
align 67108864 pre 435µs on 552µs post 354µs diff 158µs
align 33554432 pre 436µs on 552µs post 353µs diff 158µs
align 16777216 pre 413µs on 582µs post 383µs diff 184µs
align 8388608 pre 420µs on 591µs post 366µs diff 198µs
align 4194304 pre 415µs on 555µs post 353µs diff 171µs
align 2097152 pre 405µs on 567µs post 387µs diff 170µs
align 1048576 pre 412µs on 574µs post 411µs diff 162µs
align 524288 pre 413µs on 566µs post 388µs diff 165µs
align 262144 pre 415µs on 569µs post 413µs diff 154µs
align 131072 pre 414µs on 561µs post 390µs diff 159µs
align 65536 pre 408µs on 608µs post 371µs diff 218µs
align 32768 pre 412µs on 590µs post 367µs diff 200µs
align 16384 pre 430µs on 538µs post 355µs diff 145µs
align 8192 pre 380µs on 379µs post 349µs diff 14.4µs
align 4096 pre 380µs on 384µs post 348µs diff 19.9µs
align 2048 pre 387µs on 385µs post 383µs diff 134ns
########
device parameters
/sys/block/mmcblk1/device/cid:1b534d454231515430416653ef012311
/sys/block/mmcblk1/device/csd:400e00325b590000ee7f7f800a404055
/sys/block/mmcblk1/device/date:03/2018
/sys/block/mmcblk1/device/erase_size:512
/sys/block/mmcblk1/device/fwrev:0x0
/sys/block/mmcblk1/device/hwrev:0x3
/sys/block/mmcblk1/device/manfid:0x00001b
/sys/block/mmcblk1/device/name:EB1QT
/sys/block/mmcblk1/device/oemid:0x534d
/sys/block/mmcblk1/device/preferred_erase_size:4194304
/sys/block/mmcblk1/device/scr:02b5800200000000
/sys/block/mmcblk1/device/type:SD
/sys/block/mmcblk1/device/uevent:DRIVER=mmcblk
/sys/block/mmcblk1/device/uevent:MMC_TYPE=SD
/sys/block/mmcblk1/device/uevent:MMC_NAME=EB1QT
/sys/block/mmcblk1/device/uevent:MODALIAS=mmc:block
Best regards
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
Hi,
My research subject is NAND non-volatile memory and need some help.
I have beaglebone board with emmc memory and orangepi with nand memory.
I'm currently spend time on MTD utils, as i study, i should use MTD API because i want to write/read specific page with ECC?
now i'm confusing in writing driver according to:
http://www.linux-mtd.infradead.org/archive/tech/
could you help please?
Thanks
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