SD card size limitation: software limited?

[pansen]

Hi,

 

without consulting the specs first I bought a 128GByte card and obviously it doesn't work on my OPi Plus2e

 

Is there any chance this will be fixed in software or is this a hardware limitation?

 

Cheers,

pansen

[tkaiser]

There is no such hardware or software limitation, H3 devices do support SDXC cards with 128GB, below you find iozone numbers for a 128GB Samsung EVO+ made on an Orange Pi Plus 2E and here link to our documentation how to deal with SD cards: https://docs.armbian.com/User-Guide_Getting-Started/#how-to-prepare-a-sd-card

iozone -e -I -a -s 100M -r 4k -r 16k -r 128k -r 512k -r 1024k -r 16384k -i 0 -i 1 -i 2

                                                              random    random
              kB  reclen    write  rewrite    read    reread    read     write
          102400       4     1763     1706     3941     3935     3857      960
          102400      16     4179     5537    10726    10706    10127     3216
          102400     128    12715    13868    20966    20948    20501    11097
          102400     512    13708    17724    22606    22591    22526    12771
          102400    1024    17287    18220    22897    22886    22847    13159
          102400   16384    15352    18025    23100    23134    23122    13668

iozone -I -a -g 1000m -s 1000m -i 0 -i 1 -r 1k -r 4K -r 16K -r 128K -r 1024K -r 16384k

                                                              random    random
              kB  reclen    write  rewrite    read    reread    read     write
         1024000       1      421      449      992      987                
         1024000       4     1800     1789     3766     3755                
         1024000      16     5220     5662    10551    10558                
         1024000     128    14807    15013    20573    20565                
         1024000    1024    17003    17213    22773    22734                
         1024000   16384    16995    17182    22998    22744                

iozone -O -I -i 0 -i 1 -i 2 -e -+n -r 4k -r 8k -r 12k -r 16k -s 2000m

                                                              random    random
              kB  reclen    write  rewrite    read    reread    read     write
         2048000       4      449        0      935        0      924       65
         2048000       8      281        0      826        0      685       44
         2048000      12      234        0      662        0      660       36
         2048000      16      243        0      644        0      619       44

 

[pansen]

Thanks tkaiser, I actually mixed up df with lsblk  added to fstab & mounted now.

 

Here's my iozone output for reference (have a Samsung Evo+ too):

 

                                                              random    random                                     
              kB  reclen    write  rewrite    read    reread    read     write   
          102400       4     1626     1691     3835     3822     3749      570                                                   
          102400      16     2349     5292    10370    10366    10249     2585                                                   
          102400     128    13874    13887    18973    19279    19212     7679                                             
          102400     512    14150    15977    21138    21149    21065    10644                                                   
          102400    1024    15560    16312    21606    21686    21717    14302                                                    
          102400   16384    16781    17063    22455    22558    22561    17712 

 

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