Re: Now is this possible with 128 GB as well?

On Sonntag, 8. Februar 2015 00:20:10 CEST Michael Sparmann wrote:
> > Can a 128 GB card fit into a Sansa e260v1?
> > 
> > Any experiences?
> > 
> > The 64 GB card is almost full. :)
> 
> Generally speaking, 128GB cards should behave like 64GB cards. Both will
> need reformatting to FAT32 in order for Rockbox to be able to use them, but
> should work in any device that supports cards >2GB.

The one I just bought, does! Thanks Michael!

I bought Samsung Evo+ MicroSDXC 128GB. It was formatted with ExFAT. I 
formatted it with FAT32 and Rockbox worked out of the box with it.

I kept the partition table. I think they let the first partition start at 
sector 32768 (instead of Linux default 2048) for a (performance) reason.


Samsung-Evo+-MicroSDXC-128GB> somepath/flashbench.git/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 <==
1b534d3030303030101b55022500fb00

==> /sys/block/mmcblk0/device/csd <==
400e00325b590003bdfd7f800a400000

==> /sys/block/mmcblk0/device/scr <==
0245800300000000

==> /sys/block/mmcblk0/device/date <==
11/2015

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

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

==> /sys/block/mmcblk0/device/preferred_erase_size <==
4194304

==> /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 <==
0x1b550225

==> /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 <==
Festplatte /dev/mmcblk0: 119,8 GiB, 128579534848 Bytes, 251131904 Sektoren
Einheiten: Sektoren von 1 * 512 = 512 Bytes
Sektorgröße (logisch/physikalisch): 512 Bytes / 512 Bytes
E/A-Größe (minimal/optimal): 512 Bytes / 512 Bytes
Festplattenbezeichnungstyp: dos
Festplattenbezeichner: 0x00000000

Gerät          Boot Anfang      Ende  Sektoren  Größe Kn Typ
/dev/mmcblk0p1       32768 251131903 251099136 119,8G  7 HPFS/NTFS/exFAT

==> sfdisk -d <==
label: dos
label-id: 0x00000000
device: /dev/mmcblk0
unit: sectors

/dev/mmcblk0p1 : start=       32768, size=   251099136, type=7

===> 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, 251099136 sectors, extended 
partition table (last) DOS/MBR boot sector\012- data

==> sudo file -sk /dev/mmcblk0p1 <==
/dev/mmcblk0p1: DOS/MBR boot sector DOS/MBR boot sector DOS executable (COM), 
boot code\012- data

==> head -c20M | hexdump -C<==
00000000  00 00 00 00 00 00 00 00  00 00 00 00 00 00 00 00  |................|
*
000001b0  20 14 09 10 4d 00 00 00  00 00 00 00 00 00 00 0a  | ...M...........|
000001c0  09 02 07 fe ff ff 00 80  00 00 00 78 f7 0e 00 00  |...........x....|
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 78 f7 0e 00 00 00 00  |.........x......|
01000050  00 40 00 00 00 40 00 00  00 80 00 00 f8 f6 0e 00  |.@...@..........|
01000060  04 00 00 00 bd 6b 33 9c  00 01 00 00 09 08 01 80  |.....k3.........|
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  |[email protected].|
01001210  00 00 80 00 00 00 00 00  00 00 00 00 00 00 00 00  |................|
01001220  00 00 00 00 00 00 00 00  00 00 00 00 00 00 00 00  |................|
*
01001600  31 3a 7e 26 31 3a 7e 26  31 3a 7e 26 31 3a 7e 26  |1:~&1:~&1:~&1:~&|
*
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 78 f7 0e 00 00 00 00  |.........x......|
01001850  00 40 00 00 00 40 00 00  00 80 00 00 f8 f6 0e 00  |.@...@..........|
01001860  04 00 00 00 bd 6b 33 9c  00 01 00 00 09 08 01 80  |.....k3.........|
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  |[email protected].|
01002a10  00 00 80 00 00 00 00 00  00 00 00 00 00 00 00 00  |................|
01002a20  00 00 00 00 00 00 00 00  00 00 00 00 00 00 00 00  |................|
*
01002e00  31 3a 7e 26 31 3a 7e 26  31 3a 7e 26 31 3a 7e 26  |1:~&1:~&1:~&1:~&|
*
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 34359738368       pre 4.87ms      on 5.29ms       post 4.07ms     diff 
825µs
align 17179869184       pre 5.21ms      on 5.68ms       post 4.13ms     diff 
1.01ms
align 8589934592        pre 5.21ms      on 5.66ms       post 4.16ms     diff 
974µs
align 4294967296        pre 4.1ms       on 4.52ms       post 4.17ms     diff 
377µs
align 2147483648        pre 4.03ms      on 4.36ms       post 4.07ms     diff 
309µs
align 1073741824        pre 4.06ms      on 4.37ms       post 4.11ms     diff 
286µs
align 536870912 pre 4.05ms      on 4.37ms       post 4.09ms     diff 303µs
align 268435456 pre 4.06ms      on 4.4ms        post 4.12ms     diff 310µs
align 134217728 pre 4.07ms      on 4.4ms        post 4.1ms      diff 316µs
align 67108864  pre 4.06ms      on 4.39ms       post 4.11ms     diff 302µs
align 33554432  pre 4.12ms      on 4.45ms       post 4.09ms     diff 344µs
align 16777216  pre 4.1ms       on 4.44ms       post 4.08ms     diff 355µs
align 8388608   pre 4.04ms      on 4.37ms       post 4.07ms     diff 313µs
align 4194304   pre 4.01ms      on 4.35ms       post 4.1ms      diff 292µs
align 2097152   pre 4.03ms      on 4.37ms       post 4.1ms      diff 303µs
align 1048576   pre 3.99ms      on 4.34ms       post 4.05ms     diff 323µs
align 524288    pre 4.01ms      on 4.37ms       post 4.05ms     diff 343µs
align 262144    pre 4.03ms      on 4.37ms       post 4.06ms     diff 326µs
align 131072    pre 4ms on 4.35ms       post 4.05ms     diff 325µs
align 65536     pre 3.98ms      on 4.34ms       post 4.04ms     diff 331µs
align 32768     pre 4.02ms      on 4.34ms       post 4.07ms     diff 299µs
align 16384     pre 3.96ms      on 3.96ms       post 3.95ms     diff 5.47µs
align 8192      pre 4.02ms      on 4.02ms       post 4.02ms     diff 2.83µs
align 4096      pre 3.98ms      on 3.96ms       post 3.97ms     diff -18507n
align 2048      pre 4.04ms      on 4.04ms       post 4.02ms     diff 5.11µs

(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 4194304 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.)

Thanks,
-- 
Martin

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