From: Martin Steigerwald <Martin_at_lichtvoll.de>
Date: Sun, 31 Aug 2014 12:06:08 +0200

Hi!

Important things first:

The card does work in Sandisk e260v1 with Rockbox 3.13 if reformatted to
FAT32 and only with partition type 0x0c, as in:

merkaba:~> LANG=C fdisk -l /dev/mmcblk0

Disk /dev/mmcblk0: 58.6 GiB, 62881005568 bytes, 122814464 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/mmcblk0p1 32768 122814463 122781696 58.6G c W95 FAT32 (LBA)


I kept the original partitioning as it seems to be preferable erase for
optimium erase block alignment.

Yay! An additional about 32 MB to store lots of music and meditations onto!

Thanks for your advice and hints.


For your viewing pleasure some benchmark results as I posted them to
flashbench-results mailing list at Linaro:

===== Benchmark results =====

Hello!

Three runs of my flashreport script[1] which uses flashbench as well as the
open au benchmarks it suggested but additionally with report preferred erase
block size as well.

It seems pretty clear to me from the factory partitioning and the benchmark
results that the device prefers an erase block size of large 16 MiB. But
even with the reported default erase block size it seems to work quite
well. Do you agree with this interpretation?

I am not sure about the open au numbers as benchmark results do not vary
much. It appears to me that it seems to slightly prefer lower open au
numbers like 3 or 5 seem to be slightly preferable. For the intended use in
Sandisk e260v1 with Rockbox open au numbers would not matter anyway as
they are only setable with F2FS I think.

The included SD adapter from Samsung seems to have contact issues with
SD card slot in ThinkPad T520. An Intenso I already had here one has no
such issues. Except from kern.log:

Aug 31 10:37:04 merkaba kernel: [215894.957529] mmc0: card 0001 removed
Aug 31 10:37:06 merkaba kernel: [215896.457997] mmc0: new high speed SDXC card
at address 0001
Aug 31 10:37:06 merkaba kernel: [215896.458528] mmcblk0: mmc0:0001 00000 58.5
GiB
Aug 31 10:37:06 merkaba kernel: [215896.460570] mmc0: Got data interrupt
0x00200000 even though no data operation was in progress.
Aug 31 10:37:06 merkaba kernel: [215896.460717] mmcblk0: error -110 sending
status command, retrying
Aug 31 10:37:06 merkaba kernel: [215896.460768] mmcblk0: error -110 sending
status command, retrying
Aug 31 10:37:06 merkaba kernel: [215896.460820] mmcblk0: error -110 sending
status command, aborting
Aug 31 10:37:06 merkaba kernel: [215896.460833] blk_update_request: 8
callbacks suppressed
Aug 31 10:37:06 merkaba kernel: [215896.460837] end_request: I/O error, dev
mmcblk0, sector 0
Aug 31 10:37:06 merkaba kernel: [215896.460842] quiet_error: 8 callbacks
suppressed
Aug 31 10:37:06 merkaba kernel: [215896.460846] Buffer I/O error on device
mmcblk0, logical block 0
Aug 31 10:37:06 merkaba kernel: [215896.470999] mmc0: Controller never
released inhibit bit(s).
Aug 31 10:37:06 merkaba kernel: [215896.471207] mmcblk0: error -5 sending
status command, retrying
Aug 31 10:37:06 merkaba kernel: [215896.471272] mmcblk0: error -110 sending
status command, retrying
Aug 31 10:37:06 merkaba kernel: [215896.471324] mmcblk0: error -110 sending
status command, aborting
Aug 31 10:37:06 merkaba kernel: [215896.471337] end_request: I/O error, dev
mmcblk0, sector 0
Aug 31 10:37:06 merkaba kernel: [215896.471343] Buffer I/O error on device
mmcblk0, logical block 0
Aug 31 10:37:06 merkaba kernel: [215896.481525] mmc0: Controller never
released inhibit bit(s).
Aug 31 10:37:06 merkaba kernel: [215896.481678] mmcblk0: error -5 sending
status command, retrying
Aug 31 10:37:06 merkaba kernel: [215896.481742] mmcblk0: error -110 sending
status command, retrying
Aug 31 10:37:06 merkaba kernel: [215896.481796] mmcblk0: error -110 sending
status command, aborting
Aug 31 10:37:06 merkaba kernel: [215896.481809] end_request: I/O error, dev
mmcblk0, sector 0

If I really insert it slowly and press it till the arrester it seems to work,
but I rather prefer the Intenso adapter for now.


Benchmark results follow:

===== Benchmarks in ThinkPad T520 internal SD card reader =====
merkaba:~> lspci -nn | grep MMC
0d:00.0 System peripheral [0880]: Ricoh Co Ltd MMC/SD Host Controller
[1180:e822] (rev 08)

merkaba:~> tail -fn0 /var/log/kern.log
Aug 31 10:34:58 merkaba kernel: [215768.587240] mmc0: card 0001 removed
Aug 31 10:35:50 merkaba kernel: [215820.887063] mmc0: new high speed SDXC card
at address 0001
Aug 31 10:35:50 merkaba kernel: [215820.887507] mmcblk0: mmc0:0001 00000 58.5
GiB
Aug 31 10:35:50 merkaba kernel: [215820.888892] mmcblk0: p1

Device has 62881005568 bytes:

martin_at_merkaba:~> factor 62881005568
62881005568: 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 937


=== First run of flashreport script ===
martin_at_merkaba:~/[…]/flashbench> ./flashreport /dev/mmcblk0

===> MMC card detected with erase block size of 524288 bytes <===
==> find /sys/block/mmcblk0/device/ -maxdepth 1 -type f | xargs head <==

==> /sys/block/mmcblk0/device/cid <==
1b534d303030303010f216606c00e300

==> /sys/block/mmcblk0/device/csd <==
400e00325b590001d47f7f800a404000

==> /sys/block/mmcblk0/device/scr <==
02c5800300000000

==> /sys/block/mmcblk0/device/date <==
03/2014

==> /sys/block/mmcblk0/device/name <==
00000

==> /sys/block/mmcblk0/device/type <==
SD

==> /sys/block/mmcblk0/device/preferred_erase_size <==
16777216

==> /sys/block/mmcblk0/device/fwrev <==
0x0

==> /sys/block/mmcblk0/device/hwrev <==
0x1

==> /sys/block/mmcblk0/device/oemid <==
0x534d

==> /sys/block/mmcblk0/device/manfid <==
0x00001b

==> /sys/block/mmcblk0/device/serial <==
0xf216606c

==> /sys/block/mmcblk0/device/uevent <==
DRIVER=mmcblk
MMC_TYPE=SD
MMC_NAME=00000
MODALIAS=mmc:block

==> /sys/block/mmcblk0/device/erase_size <==
512

==> fdisk -lu <==
[sudo] password for martin:

Disk /dev/mmcblk0: 58.6 GiB, 62881005568 bytes, 122814464 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/mmcblk0p1 32768 122814463 122781696 58.6G 7 HPFS/NTFS/exFAT

==> sfdisk -d <==
# partition table of /dev/mmcblk0
unit: sectors

/dev/mmcblk0p1 : start= 32768, size=122781696, Id= 7
/dev/mmcblk0p2 : start= 0, size= 0, Id= 0
/dev/mmcblk0p3 : start= 0, size= 0, Id= 0
/dev/mmcblk0p4 : start= 0, size= 0, Id= 0

===> Partition details <===

==> sudo file -sk /dev/mmcblk0 <==
/dev/mmcblk0: DOS/MBR boot sector; partition 1 : ID=0x7, start-CHS (0x2,10,9),
end-CHS (0x3ff,254,63), startsector 32768, 122781696 sectors, extended
partition table (last)\011

==> sudo file -sk /dev/mmcblk0p1 <==
/dev/mmcblk0p1: DOS/MBR boot sector

==> head -c20M | hexdump -C<==
00000000 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 |................|
*
000001b0 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 0a |................|
000001c0 09 02 07 fe ff ff 00 80 00 00 00 80 51 07 00 00 |............Q...|
000001d0 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 |................|
*
000001f0 00 00 00 00 00 00 00 00 00 00 00 00 00 00 55 aa |..............U.|
00000200 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 |................|
*
01000000 eb 76 90 45 58 46 41 54 20 20 20 00 00 00 00 00 |.v.EXFAT .....|
01000010 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 |................|
*
01000040 00 80 00 00 00 00 00 00 00 80 51 07 00 00 00 00 |..........Q.....|
01000050 00 40 00 00 00 40 00 00 00 80 00 00 00 51 07 00 |._at_..._at_.......Q..|
01000060 04 00 00 00 00 00 00 00 00 01 00 00 09 08 01 80 |................|
01000070 00 00 00 00 00 00 00 00 f4 f4 f4 f4 f4 f4 f4 f4 |................|
01000080 f4 f4 f4 f4 f4 f4 f4 f4 f4 f4 f4 f4 f4 f4 f4 f4 |................|
*
010001f0 f4 f4 f4 f4 f4 f4 f4 f4 f4 f4 f4 f4 f4 f4 55 aa |..............U.|
01000200 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 |................|
*
010003f0 00 00 00 00 00 00 00 00 00 00 00 00 00 00 55 aa |..............U.|
01000400 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 |................|
*
010005f0 00 00 00 00 00 00 00 00 00 00 00 00 00 00 55 aa |..............U.|
01000600 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 |................|
*
010007f0 00 00 00 00 00 00 00 00 00 00 00 00 00 00 55 aa |..............U.|
01000800 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 |................|
*
010009f0 00 00 00 00 00 00 00 00 00 00 00 00 00 00 55 aa |..............U.|
01000a00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 |................|
*
01000bf0 00 00 00 00 00 00 00 00 00 00 00 00 00 00 55 aa |..............U.|
01000c00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 |................|
*
01000df0 00 00 00 00 00 00 00 00 00 00 00 00 00 00 55 aa |..............U.|
01000e00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 |................|
*
01000ff0 00 00 00 00 00 00 00 00 00 00 00 00 00 00 55 aa |..............U.|
01001000 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 |................|
*
010011f0 00 00 00 00 00 00 00 00 00 00 00 00 00 00 55 aa |..............U.|
01001200 46 7e 0c 0a 99 33 21 40 90 c8 fa 6d 38 9c 4b a2 |F~...3!_at_...m8.K.|
01001210 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 |................|
*
01001600 d3 f8 4a 22 d3 f8 4a 22 d3 f8 4a 22 d3 f8 4a 22 |..J"..J"..J"..J"|
*
01001800 eb 76 90 45 58 46 41 54 20 20 20 00 00 00 00 00 |.v.EXFAT .....|
01001810 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 |................|
*
01001840 00 80 00 00 00 00 00 00 00 80 51 07 00 00 00 00 |..........Q.....|
01001850 00 40 00 00 00 40 00 00 00 80 00 00 00 51 07 00 |._at_..._at_.......Q..|
01001860 04 00 00 00 00 00 00 00 00 01 00 00 09 08 01 80 |................|
01001870 00 00 00 00 00 00 00 00 f4 f4 f4 f4 f4 f4 f4 f4 |................|
01001880 f4 f4 f4 f4 f4 f4 f4 f4 f4 f4 f4 f4 f4 f4 f4 f4 |................|
*
010019f0 f4 f4 f4 f4 f4 f4 f4 f4 f4 f4 f4 f4 f4 f4 55 aa |..............U.|
01001a00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 |................|
*
01001bf0 00 00 00 00 00 00 00 00 00 00 00 00 00 00 55 aa |..............U.|
01001c00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 |................|
*
01001df0 00 00 00 00 00 00 00 00 00 00 00 00 00 00 55 aa |..............U.|
01001e00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 |................|
*
01001ff0 00 00 00 00 00 00 00 00 00 00 00 00 00 00 55 aa |..............U.|
01002000 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 |................|
*
010021f0 00 00 00 00 00 00 00 00 00 00 00 00 00 00 55 aa |..............U.|
01002200 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 |................|
*
010023f0 00 00 00 00 00 00 00 00 00 00 00 00 00 00 55 aa |..............U.|
01002400 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 |................|
*
010025f0 00 00 00 00 00 00 00 00 00 00 00 00 00 00 55 aa |..............U.|
01002600 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 |................|
*
010027f0 00 00 00 00 00 00 00 00 00 00 00 00 00 00 55 aa |..............U.|
01002800 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 |................|
*
010029f0 00 00 00 00 00 00 00 00 00 00 00 00 00 00 55 aa |..............U.|
01002a00 46 7e 0c 0a 99 33 21 40 90 c8 fa 6d 38 9c 4b a2 |F~...3!_at_...m8.K.|
01002a10 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 |................|
*
01002e00 d3 f8 4a 22 d3 f8 4a 22 d3 f8 4a 22 d3 f8 4a 22 |..J"..J"..J"..J"|
*
01003000 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 |................|
*
01400000


===> Trying to find erase block size by read tests <===

==> sudo flashbench -a --count=100 --blocksize=1024 /dev/mmcblk0 <==
align 17179869184 pre 439µs on 579µs post 277µs diff
221µs
align 8589934592 pre 440µs on 580µs post 277µs diff
221µs
align 4294967296 pre 437µs on 578µs post 274µs diff
223µs
align 2147483648 pre 440µs on 580µs post 278µs diff
221µs
align 1073741824 pre 440µs on 579µs post 277µs diff
221µs
align 536870912 pre 440µs on 579µs post 277µs diff 221µs
align 268435456 pre 439µs on 578µs post 277µs diff 221µs
align 134217728 pre 446µs on 588µs post 286µs diff 222µs
align 67108864 pre 444µs on 584µs post 282µs diff 221µs
align 33554432 pre 414µs on 551µs post 275µs diff 207µs
align 16777216 pre 422µs on 562µs post 287µs diff 207µs
align 8388608 pre 280µs on 404µs post 281µs diff 124µs
align 4194304 pre 284µs on 407µs post 279µs diff 126µs
align 2097152 pre 291µs on 415µs post 291µs diff 124µs
align 1048576 pre 295µs on 420µs post 291µs diff 127µs
align 524288 pre 293µs on 417µs post 293µs diff 124µs
align 262144 pre 287µs on 411µs post 282µs diff 127µs
align 131072 pre 287µs on 411µs post 283µs diff 126µs
align 65536 pre 287µs on 411µs post 291µs diff 122µs
align 32768 pre 274µs on 397µs post 273µs diff 123µs
align 16384 pre 274µs on 398µs post 274µs diff 124µs
align 8192 pre 273µs on 273µs post 273µs diff 348ns
align 4096 pre 281µs on 281µs post 281µs diff 136ns
align 2048 pre 267µs on 267µs post 266µs diff 557ns

(See README for an explaination on how to interpret the values.)

Medium is a memory card which reports 524288 bytes as erase block size
and 16777216 bytes as preferred erase size.

===> Suggestions for further benchmarking <===

Further tests can show the number of open erase blocks the medium
can support.

BEWARE: These tests write onto the device! Make a backup first!

Further tests could look as follows:
flashbench --open-au --open-au-nr=3 --erasesize=524288 --blocksize=1024
/dev/mmcblk0 --offset=$[24*1024*1024]
flashbench --open-au --open-au-nr=5 --erasesize=524288 --blocksize=1024
/dev/mmcblk0 --offset=$[24*1024*1024]
flashbench --open-au --open-au-nr=7 --erasesize=524288 --blocksize=1024
/dev/mmcblk0 --offset=$[24*1024*1024]
flashbench --open-au --open-au-nr=13 --erasesize=524288 --blocksize=1024
/dev/mmcblk0 --offset=$[24*1024*1024]

(Consult the README for further suggestions.)



=== Second run of flashreport script ===
martin_at_merkaba:~/…/flashbench> ./flashreport /dev/mmcblk0

===> MMC card detected with erase block size of 524288 bytes <===
[…]
===> Trying to find erase block size by read tests <===

==> sudo flashbench -a --count=100 --blocksize=1024 /dev/mmcblk0 <==
align 17179869184 pre 463µs on 602µs post 301µs diff
221µs
align 8589934592 pre 462µs on 601µs post 299µs diff
221µs
align 4294967296 pre 448µs on 588µs post 285µs diff
221µs
align 2147483648 pre 467µs on 608µs post 304µs diff
223µs
align 1073741824 pre 456µs on 595µs post 293µs diff
220µs
align 536870912 pre 456µs on 596µs post 292µs diff 221µs
align 268435456 pre 451µs on 593µs post 286µs diff 224µs
align 134217728 pre 455µs on 594µs post 288µs diff 222µs
align 67108864 pre 445µs on 585µs post 284µs diff 221µs
align 33554432 pre 435µs on 573µs post 293µs diff 208µs
align 16777216 pre 422µs on 560µs post 284µs diff 207µs
align 8388608 pre 285µs on 409µs post 285µs diff 124µs
align 4194304 pre 291µs on 416µs post 287µs diff 127µs
align 2097152 pre 294µs on 417µs post 293µs diff 124µs
align 1048576 pre 292µs on 416µs post 288µs diff 126µs
align 524288 pre 287µs on 409µs post 285µs diff 124µs
align 262144 pre 283µs on 407µs post 278µs diff 126µs
align 131072 pre 285µs on 409µs post 280µs diff 126µs
align 65536 pre 283µs on 407µs post 287µs diff 122µs
align 32768 pre 289µs on 411µs post 288µs diff 123µs
align 16384 pre 278µs on 402µs post 278µs diff 124µs
align 8192 pre 282µs on 281µs post 281µs diff -523ns
align 4096 pre 283µs on 283µs post 283µs diff 131ns
align 2048 pre 286µs on 285µs post 285µs diff -817ns

(See README for an explaination on how to interpret the values.)

Medium is a memory card which reports 524288 bytes as erase block size
and 16777216 bytes as preferred erase size.

[…]

=== Third run of flashreport script ===
martin_at_merkaba:~/…/flashbench> ./flashreport /dev/mmcblk0
[…]
===> Trying to find erase block size by read tests <===

==> sudo flashbench -a --count=100 --blocksize=1024 /dev/mmcblk0 <==
align 17179869184 pre 457µs on 597µs post 295µs diff
221µs
align 8589934592 pre 453µs on 593µs post 289µs diff
222µs
align 4294967296 pre 463µs on 602µs post 299µs diff
221µs
align 2147483648 pre 447µs on 586µs post 284µs diff
221µs
align 1073741824 pre 450µs on 590µs post 286µs diff
222µs
align 536870912 pre 451µs on 590µs post 286µs diff 221µs
align 268435456 pre 446µs on 585µs post 283µs diff 221µs
align 134217728 pre 449µs on 589µs post 285µs diff 222µs
align 67108864 pre 453µs on 594µs post 291µs diff 222µs
align 33554432 pre 420µs on 557µs post 280µs diff 206µs
align 16777216 pre 423µs on 560µs post 284µs diff 207µs
align 8388608 pre 284µs on 408µs post 283µs diff 124µs
align 4194304 pre 291µs on 415µs post 286µs diff 127µs
align 2097152 pre 286µs on 409µs post 285µs diff 124µs
align 1048576 pre 290µs on 414µs post 286µs diff 126µs
align 524288 pre 293µs on 419µs post 293µs diff 126µs
align 262144 pre 287µs on 412µs post 283µs diff 127µs
align 131072 pre 285µs on 408µs post 279µs diff 126µs
align 65536 pre 301µs on 426µs post 305µs diff 123µs
align 32768 pre 283µs on 408µs post 283µs diff 124µs
align 16384 pre 279µs on 403µs post 278µs diff 124µs
align 8192 pre 279µs on 279µs post 279µs diff 300ns
align 4096 pre 280µs on 279µs post 279µs diff 133ns
align 2048 pre 279µs on 279µs post 279µs diff 52ns

(See README for an explaination on how to interpret the values.)

Medium is a memory card which reports 524288 bytes as erase block size
and 16777216 bytes as preferred erase size.
[…]



Some open au write benchmarks. It seems to me: Either the Samsung rating of
48 MB/s is highly overrated or the cardreader is not UHS-1 capable.


martin_at_merkaba:~/[…]/flashbench> sudo flashbench --open-au --open-au-nr=3 --
erasesize=524288 --blocksize=1024 /dev/mmcblk0 --offset=$[24*1024*1024]
512KiB 12.5M/s
256KiB 14M/s
128KiB 13.8M/s
64KiB 14.2M/s
32KiB 14.6M/s
16KiB 10.5M/s
8KiB 6.45M/s
4KiB 3.54M/s
2KiB 1.87M/s
1KiB 922K/s
martin_at_merkaba:~/[…]/flashbench> sudo flashbench --open-au --open-au-nr=5 --
erasesize=524288 --blocksize=1024 /dev/mmcblk0 --offset=$[24*1024*1024]
512KiB 14M/s
256KiB 14.3M/s
128KiB 12.6M/s
64KiB 13.3M/s
32KiB 12.7M/s
16KiB 11.6M/s
8KiB 7.11M/s
4KiB 3.8M/s
2KiB 1.93M/s
1KiB 973K/s
martin_at_merkaba:~/[…]/flashbench> sudo flashbench --open-au --open-au-nr=7 --
erasesize=524288 --blocksize=1024 /dev/mmcblk0 --offset=$[24*1024*1024]
512KiB 13.6M/s
256KiB 14M/s
128KiB 14.2M/s
64KiB 13.3M/s
32KiB 12.8M/s
16KiB 11.5M/s
8KiB 6.68M/s
4KiB 3.73M/s
2KiB 1.93M/s
1KiB 962K/s
martin_at_merkaba:~/[…]/flashbench> sudo flashbench --open-au --open-au-nr=13 --
erasesize=524288 --blocksize=1024 /dev/mmcblk0 --offset=$[24*1024*1024]
512KiB 13.5M/s
256KiB 14M/s
128KiB 13.9M/s
64KiB 12.9M/s
32KiB 12.4M/s
16KiB 10.7M/s
8KiB 6.79M/s
4KiB 3.76M/s
2KiB 1.86M/s
1KiB 957K/s



martin_at_merkaba:~/[…]/flashbench> sudo flashbench --open-au --open-au-nr=3 --
erasesize=16777216 --blocksize=1024 /dev/mmcblk0 --offset=$[24*1024*1024]
16MiB 14.1M/s
8MiB 13.6M/s
4MiB 13.5M/s
2MiB 13.6M/s
1MiB 13.4M/s
512KiB 13.3M/s
256KiB 13.1M/s
128KiB 12.9M/s
64KiB 12.9M/s
32KiB 13.1M/s
16KiB 10.4M/s
8KiB 6.37M/s
4KiB 3.6M/s
2KiB 1.83M/s
1KiB 948K/s

martin_at_merkaba:~/[…]/flashbench> sudo flashbench --open-au --open-au-nr=5 --
erasesize=16777216 --blocksize=1024 /dev/mmcblk0 --offset=$[24*1024*1024]
16MiB 13.8M/s
8MiB 13.6M/s
4MiB 13.5M/s
2MiB 13.7M/s
1MiB 13.5M/s
512KiB 13.3M/s
256KiB 13.4M/s
128KiB 13M/s
64KiB 12.7M/s
32KiB 12.2M/s
16KiB 9.88M/s
8KiB 6.14M/s
4KiB 3.54M/s
2KiB 1.76M/s
1KiB 897K/s

martin_at_merkaba:~/[…]/flashbench> sudo flashbench --open-au --open-au-nr=7 --
erasesize=16777216 --blocksize=1024 /dev/mmcblk0 --offset=$[24*1024*1024]
16MiB 13.7M/s
8MiB 13.6M/s
4MiB 13.6M/s
2MiB 13.4M/s
1MiB 13.4M/s
512KiB 13.1M/s
256KiB 13.3M/s
128KiB 13M/s
64KiB 12.8M/s
32KiB 12.2M/s
16KiB 9.91M/s
8KiB 6.18M/s
4KiB 3.54M/s
2KiB 1.76M/s
1KiB 914K/s

martin_at_merkaba:~/[…]/flashbench> sudo flashbench --open-au --open-au-nr=13 --
erasesize=16777216 --blocksize=1024 /dev/mmcblk0 --offset=$[24*1024*1024]
16MiB 13.9M/s
8MiB 13.6M/s
4MiB 13.8M/s
2MiB 13.4M/s
1MiB 13.5M/s
512KiB 13.2M/s
256KiB 12.8M/s
128KiB 12M/s
64KiB 11M/s
32KiB 9.37M/s
16KiB 6.45M/s
8KiB 3.07M/s
4KiB 1.6M/s
2KiB 797K/s
1KiB 408K/s


===== Benchmarks in digisol 2.0 Multi Card Reader 5.1 =====
Seems to be a Transcend reader:

merkaba:~> lsusb | grep Transcend
Bus 002 Device 007: ID 1307:0330 Transcend Information, Inc. 63-in-1 Multi-
Card Reader/Writer

merkaba:~> tail -fn0 /var/log/kern.log
Aug 31 10:51:49 merkaba kernel: [216779.647323] usb 2-1.1: new high-speed USB
device number 7 using ehci-pci
Aug 31 10:51:49 merkaba kernel: [216779.930706] usb 2-1.1: New USB device
found, idVendor=1307, idProduct=0330
Aug 31 10:51:49 merkaba kernel: [216779.930721] usb 2-1.1: New USB device
strings: Mfr=1, Product=2, SerialNumber=3
Aug 31 10:51:49 merkaba kernel: [216779.930728] usb 2-1.1: Product: Mass
Storage Device
Aug 31 10:51:49 merkaba kernel: [216779.930734] usb 2-1.1: Manufacturer:
Generic
Aug 31 10:51:49 merkaba kernel: [216779.930739] usb 2-1.1: SerialNumber:
00000000000006
Aug 31 10:51:49 merkaba kernel: [216779.931712] usb-storage 2-1.1:1.0: USB
Mass Storage device detected
Aug 31 10:51:49 merkaba kernel: [216779.931996] scsi host13: usb-storage
2-1.1:1.0
Aug 31 10:51:50 merkaba kernel: [216780.935185] scsi 13:0:0:0: Direct-Access
Generic USB CF Reader 0.00 PQ: 0 ANSI: 2
Aug 31 10:51:50 merkaba kernel: [216780.935856] scsi 13:0:0:1: Direct-Access
Generic USB SD Reader 0.00 PQ: 0 ANSI: 2
Aug 31 10:51:50 merkaba kernel: [216780.936529] scsi 13:0:0:2: Direct-Access
Generic Mini SD Reader 0.00 PQ: 0 ANSI: 2
Aug 31 10:51:50 merkaba kernel: [216780.937054] scsi 13:0:0:3: Direct-Access
Generic USB MS Reader 0.00 PQ: 0 ANSI: 2
Aug 31 10:51:50 merkaba kernel: [216780.937556] scsi 13:0:0:4: Direct-Access
Generic USB SM Reader 0.00 PQ: 0 ANSI: 2
Aug 31 10:51:50 merkaba kernel: [216780.938602] sd 13:0:0:0: Attached scsi
generic sg3 type 0
Aug 31 10:51:50 merkaba kernel: [216780.940382] sd 13:0:0:1: Attached scsi
generic sg4 type 0
Aug 31 10:51:50 merkaba kernel: [216780.942365] sd 13:0:0:2: Attached scsi
generic sg5 type 0
Aug 31 10:51:50 merkaba kernel: [216780.945763] sd 13:0:0:0: [sdc] Attached
SCSI removable disk
Aug 31 10:51:50 merkaba kernel: [216780.947310] sd 13:0:0:3: Attached scsi
generic sg6 type 0
Aug 31 10:51:50 merkaba kernel: [216780.948245] sd 13:0:0:4: Attached scsi
generic sg7 type 0
Aug 31 10:51:50 merkaba kernel: [216780.948512] sd 13:0:0:2: [sde] Attached
SCSI removable disk
Aug 31 10:51:50 merkaba kernel: [216780.949139] sd 13:0:0:1: [sdd] Attached
SCSI removable disk
Aug 31 10:51:50 merkaba kernel: [216780.952637] sd 13:0:0:3: [sdf] Attached
SCSI removable disk
Aug 31 10:51:50 merkaba kernel: [216780.954517] sd 13:0:0:4: [sdg] Attached
SCSI removable disk


merkaba:~> tail -fn0 /var/log/kern.log
Aug 31 10:54:39 merkaba kernel: [216949.712566] sd 14:0:0:1: [sdd] 2048 512-
byte logical blocks: (1.04 MB/1.00 MiB)
Aug 31 10:54:39 merkaba kernel: [216949.717781] sdd: sdd1
Aug 31 10:54:39 merkaba kernel: [216949.717841] sdd: p1 start 32768 is beyond
EOD, enabling native capacity
Aug 31 10:54:39 merkaba kernel: [216949.721094] sdd: sdd1
Aug 31 10:54:39 merkaba kernel: [216949.721129] sdd: p1 start 32768 is beyond
EOD, truncated

Lol, can´t read this SDXC card it seems. :)


[1] git_at_gitorious.org:flashbench-martin21/flashbench.git

Thanks,

-- 
Martin 'Helios' Steigerwald - http://www.Lichtvoll.de
GPG: 03B0 0D6C 0040 0710 4AFA  B82F 991B EAAC A599 84C7
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Received on 2014-08-31