Linux - couldn't mount RDWR because of unsupported optional features (400)












7















I try to run Android from SD-card. This card is prepared. There are partitions: boot(FAT32), rootfs(ext4), system(ext4), cache(ext4) and usedata(ext4). Boot partitions has files to run u-boot: MLO, u-boot.bin and uImage. To run it I use commands



mmcinit 0
fatload mmc 0 0x80000000 uImage
setenv bootargs 'console=ttyO2,115200n8 mem=456M@0x80000000 mem=512M@0xA0000000 init=/init vram=10M omapfb.vram=0:4M androidboot.console=ttyO2 root=/dev/mmcblk1p2 rw rootwait rootfstype=ext4'
bootm 0x80000000


Than I see how Linux starts. But after few seconds on step of loading rootfs I see an error message



[    4.015655] EXT4-fs (mmcblk1p2): couldn't mount RDWR because of unsupported optional features (400)
[ 4.036499] sd 0:0:0:0: [sda] Attached SCSI removable disk
[ 4.079986] List of all partitions:
[ 4.083801] b300 31162368 mmcblk0 driver: mmcblk
[ 4.089660] b301 128 mmcblk0p1 f9f21f00-a8d4-5f0e-9746-594869aec34e
[ 4.097839] b302 256 mmcblk0p2 f9f21f01-a8d4-5f0e-9746-594869aec34e
[ 4.106018] b303 128 mmcblk0p3 f9f21f02-a8d4-5f0e-9746-594869aec34e
[ 4.114288] b304 16384 mmcblk0p4 f9f21f03-a8d4-5f0e-9746-594869aec34e
[ 4.122436] b305 16 mmcblk0p5 f9f21f04-a8d4-5f0e-9746-594869aec34e
[ 4.130676] b306 8192 mmcblk0p6 f9f21f05-a8d4-5f0e-9746-594869aec34e
[ 4.138916] b307 8192 mmcblk0p7 f9f21f06-a8d4-5f0e-9746-594869aec34e
[ 4.147094] 103:00000 524288 mmcblk0p8 f9f21f07-a8d4-5f0e-9746-594869aec34e
[ 4.155334] 103:00001 262144 mmcblk0p9 f9f21f08-a8d4-5f0e-9746-594869aec34e
[ 4.163574] 103:00002 30342128 mmcblk0p10 f9f21f09-a8d4-5f0e-9746-594869aec34e
[ 4.171874] b310 2048 mmcblk0boot1 (driver?)
[ 4.177734] b308 2048 mmcblk0boot0 (driver?)
[ 4.183593] b318 15179776 mmcblk1 driver: mmcblk
[ 4.189453] b319 102400 mmcblk1p1 00000000-0000-0000-0000-000000000000
[ 4.197692] b31a 10240 mmcblk1p2 00000000-0000-0000-0000-000000000000
[ 4.205932] b31b 1 mmcblk1p3 00000000-0000-0000-0000-000000000000
[ 4.214141] b31d 262144 mmcblk1p5 00000000-0000-0000-0000-000000000000
[ 4.222351] b31e 13228032 mmcblk1p6 00000000-0000-0000-0000-000000000000
[ 4.230682] b31f 1572864 mmcblk1p7 00000000-0000-0000-0000-000000000000
[ 4.238891] No filesystem could mount root, tried: ext4
[ 4.244812] Kernel panic - not syncing: VFS: Unable to mount root fs on unknown-block(179,26)
[ 4.254089] CPU1: stopping


I don't know why it happens.
How can I solve this problem?










share|improve this question



























    7















    I try to run Android from SD-card. This card is prepared. There are partitions: boot(FAT32), rootfs(ext4), system(ext4), cache(ext4) and usedata(ext4). Boot partitions has files to run u-boot: MLO, u-boot.bin and uImage. To run it I use commands



    mmcinit 0
    fatload mmc 0 0x80000000 uImage
    setenv bootargs 'console=ttyO2,115200n8 mem=456M@0x80000000 mem=512M@0xA0000000 init=/init vram=10M omapfb.vram=0:4M androidboot.console=ttyO2 root=/dev/mmcblk1p2 rw rootwait rootfstype=ext4'
    bootm 0x80000000


    Than I see how Linux starts. But after few seconds on step of loading rootfs I see an error message



    [    4.015655] EXT4-fs (mmcblk1p2): couldn't mount RDWR because of unsupported optional features (400)
    [ 4.036499] sd 0:0:0:0: [sda] Attached SCSI removable disk
    [ 4.079986] List of all partitions:
    [ 4.083801] b300 31162368 mmcblk0 driver: mmcblk
    [ 4.089660] b301 128 mmcblk0p1 f9f21f00-a8d4-5f0e-9746-594869aec34e
    [ 4.097839] b302 256 mmcblk0p2 f9f21f01-a8d4-5f0e-9746-594869aec34e
    [ 4.106018] b303 128 mmcblk0p3 f9f21f02-a8d4-5f0e-9746-594869aec34e
    [ 4.114288] b304 16384 mmcblk0p4 f9f21f03-a8d4-5f0e-9746-594869aec34e
    [ 4.122436] b305 16 mmcblk0p5 f9f21f04-a8d4-5f0e-9746-594869aec34e
    [ 4.130676] b306 8192 mmcblk0p6 f9f21f05-a8d4-5f0e-9746-594869aec34e
    [ 4.138916] b307 8192 mmcblk0p7 f9f21f06-a8d4-5f0e-9746-594869aec34e
    [ 4.147094] 103:00000 524288 mmcblk0p8 f9f21f07-a8d4-5f0e-9746-594869aec34e
    [ 4.155334] 103:00001 262144 mmcblk0p9 f9f21f08-a8d4-5f0e-9746-594869aec34e
    [ 4.163574] 103:00002 30342128 mmcblk0p10 f9f21f09-a8d4-5f0e-9746-594869aec34e
    [ 4.171874] b310 2048 mmcblk0boot1 (driver?)
    [ 4.177734] b308 2048 mmcblk0boot0 (driver?)
    [ 4.183593] b318 15179776 mmcblk1 driver: mmcblk
    [ 4.189453] b319 102400 mmcblk1p1 00000000-0000-0000-0000-000000000000
    [ 4.197692] b31a 10240 mmcblk1p2 00000000-0000-0000-0000-000000000000
    [ 4.205932] b31b 1 mmcblk1p3 00000000-0000-0000-0000-000000000000
    [ 4.214141] b31d 262144 mmcblk1p5 00000000-0000-0000-0000-000000000000
    [ 4.222351] b31e 13228032 mmcblk1p6 00000000-0000-0000-0000-000000000000
    [ 4.230682] b31f 1572864 mmcblk1p7 00000000-0000-0000-0000-000000000000
    [ 4.238891] No filesystem could mount root, tried: ext4
    [ 4.244812] Kernel panic - not syncing: VFS: Unable to mount root fs on unknown-block(179,26)
    [ 4.254089] CPU1: stopping


    I don't know why it happens.
    How can I solve this problem?










    share|improve this question

























      7












      7








      7


      2






      I try to run Android from SD-card. This card is prepared. There are partitions: boot(FAT32), rootfs(ext4), system(ext4), cache(ext4) and usedata(ext4). Boot partitions has files to run u-boot: MLO, u-boot.bin and uImage. To run it I use commands



      mmcinit 0
      fatload mmc 0 0x80000000 uImage
      setenv bootargs 'console=ttyO2,115200n8 mem=456M@0x80000000 mem=512M@0xA0000000 init=/init vram=10M omapfb.vram=0:4M androidboot.console=ttyO2 root=/dev/mmcblk1p2 rw rootwait rootfstype=ext4'
      bootm 0x80000000


      Than I see how Linux starts. But after few seconds on step of loading rootfs I see an error message



      [    4.015655] EXT4-fs (mmcblk1p2): couldn't mount RDWR because of unsupported optional features (400)
      [ 4.036499] sd 0:0:0:0: [sda] Attached SCSI removable disk
      [ 4.079986] List of all partitions:
      [ 4.083801] b300 31162368 mmcblk0 driver: mmcblk
      [ 4.089660] b301 128 mmcblk0p1 f9f21f00-a8d4-5f0e-9746-594869aec34e
      [ 4.097839] b302 256 mmcblk0p2 f9f21f01-a8d4-5f0e-9746-594869aec34e
      [ 4.106018] b303 128 mmcblk0p3 f9f21f02-a8d4-5f0e-9746-594869aec34e
      [ 4.114288] b304 16384 mmcblk0p4 f9f21f03-a8d4-5f0e-9746-594869aec34e
      [ 4.122436] b305 16 mmcblk0p5 f9f21f04-a8d4-5f0e-9746-594869aec34e
      [ 4.130676] b306 8192 mmcblk0p6 f9f21f05-a8d4-5f0e-9746-594869aec34e
      [ 4.138916] b307 8192 mmcblk0p7 f9f21f06-a8d4-5f0e-9746-594869aec34e
      [ 4.147094] 103:00000 524288 mmcblk0p8 f9f21f07-a8d4-5f0e-9746-594869aec34e
      [ 4.155334] 103:00001 262144 mmcblk0p9 f9f21f08-a8d4-5f0e-9746-594869aec34e
      [ 4.163574] 103:00002 30342128 mmcblk0p10 f9f21f09-a8d4-5f0e-9746-594869aec34e
      [ 4.171874] b310 2048 mmcblk0boot1 (driver?)
      [ 4.177734] b308 2048 mmcblk0boot0 (driver?)
      [ 4.183593] b318 15179776 mmcblk1 driver: mmcblk
      [ 4.189453] b319 102400 mmcblk1p1 00000000-0000-0000-0000-000000000000
      [ 4.197692] b31a 10240 mmcblk1p2 00000000-0000-0000-0000-000000000000
      [ 4.205932] b31b 1 mmcblk1p3 00000000-0000-0000-0000-000000000000
      [ 4.214141] b31d 262144 mmcblk1p5 00000000-0000-0000-0000-000000000000
      [ 4.222351] b31e 13228032 mmcblk1p6 00000000-0000-0000-0000-000000000000
      [ 4.230682] b31f 1572864 mmcblk1p7 00000000-0000-0000-0000-000000000000
      [ 4.238891] No filesystem could mount root, tried: ext4
      [ 4.244812] Kernel panic - not syncing: VFS: Unable to mount root fs on unknown-block(179,26)
      [ 4.254089] CPU1: stopping


      I don't know why it happens.
      How can I solve this problem?










      share|improve this question














      I try to run Android from SD-card. This card is prepared. There are partitions: boot(FAT32), rootfs(ext4), system(ext4), cache(ext4) and usedata(ext4). Boot partitions has files to run u-boot: MLO, u-boot.bin and uImage. To run it I use commands



      mmcinit 0
      fatload mmc 0 0x80000000 uImage
      setenv bootargs 'console=ttyO2,115200n8 mem=456M@0x80000000 mem=512M@0xA0000000 init=/init vram=10M omapfb.vram=0:4M androidboot.console=ttyO2 root=/dev/mmcblk1p2 rw rootwait rootfstype=ext4'
      bootm 0x80000000


      Than I see how Linux starts. But after few seconds on step of loading rootfs I see an error message



      [    4.015655] EXT4-fs (mmcblk1p2): couldn't mount RDWR because of unsupported optional features (400)
      [ 4.036499] sd 0:0:0:0: [sda] Attached SCSI removable disk
      [ 4.079986] List of all partitions:
      [ 4.083801] b300 31162368 mmcblk0 driver: mmcblk
      [ 4.089660] b301 128 mmcblk0p1 f9f21f00-a8d4-5f0e-9746-594869aec34e
      [ 4.097839] b302 256 mmcblk0p2 f9f21f01-a8d4-5f0e-9746-594869aec34e
      [ 4.106018] b303 128 mmcblk0p3 f9f21f02-a8d4-5f0e-9746-594869aec34e
      [ 4.114288] b304 16384 mmcblk0p4 f9f21f03-a8d4-5f0e-9746-594869aec34e
      [ 4.122436] b305 16 mmcblk0p5 f9f21f04-a8d4-5f0e-9746-594869aec34e
      [ 4.130676] b306 8192 mmcblk0p6 f9f21f05-a8d4-5f0e-9746-594869aec34e
      [ 4.138916] b307 8192 mmcblk0p7 f9f21f06-a8d4-5f0e-9746-594869aec34e
      [ 4.147094] 103:00000 524288 mmcblk0p8 f9f21f07-a8d4-5f0e-9746-594869aec34e
      [ 4.155334] 103:00001 262144 mmcblk0p9 f9f21f08-a8d4-5f0e-9746-594869aec34e
      [ 4.163574] 103:00002 30342128 mmcblk0p10 f9f21f09-a8d4-5f0e-9746-594869aec34e
      [ 4.171874] b310 2048 mmcblk0boot1 (driver?)
      [ 4.177734] b308 2048 mmcblk0boot0 (driver?)
      [ 4.183593] b318 15179776 mmcblk1 driver: mmcblk
      [ 4.189453] b319 102400 mmcblk1p1 00000000-0000-0000-0000-000000000000
      [ 4.197692] b31a 10240 mmcblk1p2 00000000-0000-0000-0000-000000000000
      [ 4.205932] b31b 1 mmcblk1p3 00000000-0000-0000-0000-000000000000
      [ 4.214141] b31d 262144 mmcblk1p5 00000000-0000-0000-0000-000000000000
      [ 4.222351] b31e 13228032 mmcblk1p6 00000000-0000-0000-0000-000000000000
      [ 4.230682] b31f 1572864 mmcblk1p7 00000000-0000-0000-0000-000000000000
      [ 4.238891] No filesystem could mount root, tried: ext4
      [ 4.244812] Kernel panic - not syncing: VFS: Unable to mount root fs on unknown-block(179,26)
      [ 4.254089] CPU1: stopping


      I don't know why it happens.
      How can I solve this problem?







      linux boot android sd-card u-boot






      share|improve this question













      share|improve this question











      share|improve this question




      share|improve this question










      asked Jun 2 '16 at 10:16









      DropperDropper

      8019




      8019






















          3 Answers
          3






          active

          oldest

          votes


















          6














          The error "EXT4-fs : couldn't mount RDWR because of unsupported optional features (400)" is due to different versions between the partition formatter (mkfs.ext4) and the mounter.



          You have two options:



          a) Either you have to upgrade the mounter program using a newer distro inside the SD-card.



          b) or you have to backup the files, reformat the SD-card with the same distro (the same ext4 versions) you are doing the mounting, and after the reformat copy the files again to the SD-card.



          In the second option, care must be taken with the original ext4 options the formatter has put, trying to consider the same options at reformat. Note also that a reformat of partitions doesn't need a repartition of the whole device, so the boot MBR would not be altered.






          share|improve this answer

































            4














            The ext4 feature (400) is the new metadata_csum feature. If this feature is enabled and old tools are used to mount the filesystem they will only be able to mount read-only.



            https://ext4.wiki.kernel.org/index.php/Ext4_Metadata_Checksums



            To create a ext4 filesystem without this feature:



            sudo mke2fs /dev/sdb1 -O ^metadata_csum


            Or turn it off on an already created filesystem:



            sudo tune2fs -O ^metadata_csum /dev/sdb1





            share|improve this answer



















            • 1





              git.kernel.org/pub/scm/fs/ext2/e2fsprogs.git/tree/lib/ext2fs/… #define EXT4_FEATURE_RO_COMPAT_METADATA_CSUM 0x0400

              – jjcf89
              Jul 12 '18 at 14:59





















            0














            Super-great thanks :) Im already has been tired to find solution in f*kin Inet. Its upperas after upgrade Debian from Jessie to Stretch. Solved by switch off option in /etc/mke2fs.conf in section ext4






            share|improve this answer








            New contributor




            Stra Teger is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
            Check out our Code of Conduct.




















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              3 Answers
              3






              active

              oldest

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              3 Answers
              3






              active

              oldest

              votes









              active

              oldest

              votes






              active

              oldest

              votes









              6














              The error "EXT4-fs : couldn't mount RDWR because of unsupported optional features (400)" is due to different versions between the partition formatter (mkfs.ext4) and the mounter.



              You have two options:



              a) Either you have to upgrade the mounter program using a newer distro inside the SD-card.



              b) or you have to backup the files, reformat the SD-card with the same distro (the same ext4 versions) you are doing the mounting, and after the reformat copy the files again to the SD-card.



              In the second option, care must be taken with the original ext4 options the formatter has put, trying to consider the same options at reformat. Note also that a reformat of partitions doesn't need a repartition of the whole device, so the boot MBR would not be altered.






              share|improve this answer






























                6














                The error "EXT4-fs : couldn't mount RDWR because of unsupported optional features (400)" is due to different versions between the partition formatter (mkfs.ext4) and the mounter.



                You have two options:



                a) Either you have to upgrade the mounter program using a newer distro inside the SD-card.



                b) or you have to backup the files, reformat the SD-card with the same distro (the same ext4 versions) you are doing the mounting, and after the reformat copy the files again to the SD-card.



                In the second option, care must be taken with the original ext4 options the formatter has put, trying to consider the same options at reformat. Note also that a reformat of partitions doesn't need a repartition of the whole device, so the boot MBR would not be altered.






                share|improve this answer




























                  6












                  6








                  6







                  The error "EXT4-fs : couldn't mount RDWR because of unsupported optional features (400)" is due to different versions between the partition formatter (mkfs.ext4) and the mounter.



                  You have two options:



                  a) Either you have to upgrade the mounter program using a newer distro inside the SD-card.



                  b) or you have to backup the files, reformat the SD-card with the same distro (the same ext4 versions) you are doing the mounting, and after the reformat copy the files again to the SD-card.



                  In the second option, care must be taken with the original ext4 options the formatter has put, trying to consider the same options at reformat. Note also that a reformat of partitions doesn't need a repartition of the whole device, so the boot MBR would not be altered.






                  share|improve this answer















                  The error "EXT4-fs : couldn't mount RDWR because of unsupported optional features (400)" is due to different versions between the partition formatter (mkfs.ext4) and the mounter.



                  You have two options:



                  a) Either you have to upgrade the mounter program using a newer distro inside the SD-card.



                  b) or you have to backup the files, reformat the SD-card with the same distro (the same ext4 versions) you are doing the mounting, and after the reformat copy the files again to the SD-card.



                  In the second option, care must be taken with the original ext4 options the formatter has put, trying to consider the same options at reformat. Note also that a reformat of partitions doesn't need a repartition of the whole device, so the boot MBR would not be altered.







                  share|improve this answer














                  share|improve this answer



                  share|improve this answer








                  edited Apr 14 '17 at 21:39

























                  answered Apr 14 '17 at 21:34









                  tormestormes

                  11113




                  11113

























                      4














                      The ext4 feature (400) is the new metadata_csum feature. If this feature is enabled and old tools are used to mount the filesystem they will only be able to mount read-only.



                      https://ext4.wiki.kernel.org/index.php/Ext4_Metadata_Checksums



                      To create a ext4 filesystem without this feature:



                      sudo mke2fs /dev/sdb1 -O ^metadata_csum


                      Or turn it off on an already created filesystem:



                      sudo tune2fs -O ^metadata_csum /dev/sdb1





                      share|improve this answer



















                      • 1





                        git.kernel.org/pub/scm/fs/ext2/e2fsprogs.git/tree/lib/ext2fs/… #define EXT4_FEATURE_RO_COMPAT_METADATA_CSUM 0x0400

                        – jjcf89
                        Jul 12 '18 at 14:59


















                      4














                      The ext4 feature (400) is the new metadata_csum feature. If this feature is enabled and old tools are used to mount the filesystem they will only be able to mount read-only.



                      https://ext4.wiki.kernel.org/index.php/Ext4_Metadata_Checksums



                      To create a ext4 filesystem without this feature:



                      sudo mke2fs /dev/sdb1 -O ^metadata_csum


                      Or turn it off on an already created filesystem:



                      sudo tune2fs -O ^metadata_csum /dev/sdb1





                      share|improve this answer



















                      • 1





                        git.kernel.org/pub/scm/fs/ext2/e2fsprogs.git/tree/lib/ext2fs/… #define EXT4_FEATURE_RO_COMPAT_METADATA_CSUM 0x0400

                        – jjcf89
                        Jul 12 '18 at 14:59
















                      4












                      4








                      4







                      The ext4 feature (400) is the new metadata_csum feature. If this feature is enabled and old tools are used to mount the filesystem they will only be able to mount read-only.



                      https://ext4.wiki.kernel.org/index.php/Ext4_Metadata_Checksums



                      To create a ext4 filesystem without this feature:



                      sudo mke2fs /dev/sdb1 -O ^metadata_csum


                      Or turn it off on an already created filesystem:



                      sudo tune2fs -O ^metadata_csum /dev/sdb1





                      share|improve this answer













                      The ext4 feature (400) is the new metadata_csum feature. If this feature is enabled and old tools are used to mount the filesystem they will only be able to mount read-only.



                      https://ext4.wiki.kernel.org/index.php/Ext4_Metadata_Checksums



                      To create a ext4 filesystem without this feature:



                      sudo mke2fs /dev/sdb1 -O ^metadata_csum


                      Or turn it off on an already created filesystem:



                      sudo tune2fs -O ^metadata_csum /dev/sdb1






                      share|improve this answer












                      share|improve this answer



                      share|improve this answer










                      answered Jul 12 '18 at 14:57









                      jjcf89jjcf89

                      1412




                      1412








                      • 1





                        git.kernel.org/pub/scm/fs/ext2/e2fsprogs.git/tree/lib/ext2fs/… #define EXT4_FEATURE_RO_COMPAT_METADATA_CSUM 0x0400

                        – jjcf89
                        Jul 12 '18 at 14:59
















                      • 1





                        git.kernel.org/pub/scm/fs/ext2/e2fsprogs.git/tree/lib/ext2fs/… #define EXT4_FEATURE_RO_COMPAT_METADATA_CSUM 0x0400

                        – jjcf89
                        Jul 12 '18 at 14:59










                      1




                      1





                      git.kernel.org/pub/scm/fs/ext2/e2fsprogs.git/tree/lib/ext2fs/… #define EXT4_FEATURE_RO_COMPAT_METADATA_CSUM 0x0400

                      – jjcf89
                      Jul 12 '18 at 14:59







                      git.kernel.org/pub/scm/fs/ext2/e2fsprogs.git/tree/lib/ext2fs/… #define EXT4_FEATURE_RO_COMPAT_METADATA_CSUM 0x0400

                      – jjcf89
                      Jul 12 '18 at 14:59













                      0














                      Super-great thanks :) Im already has been tired to find solution in f*kin Inet. Its upperas after upgrade Debian from Jessie to Stretch. Solved by switch off option in /etc/mke2fs.conf in section ext4






                      share|improve this answer








                      New contributor




                      Stra Teger is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
                      Check out our Code of Conduct.

























                        0














                        Super-great thanks :) Im already has been tired to find solution in f*kin Inet. Its upperas after upgrade Debian from Jessie to Stretch. Solved by switch off option in /etc/mke2fs.conf in section ext4






                        share|improve this answer








                        New contributor




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                          Super-great thanks :) Im already has been tired to find solution in f*kin Inet. Its upperas after upgrade Debian from Jessie to Stretch. Solved by switch off option in /etc/mke2fs.conf in section ext4






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                          Super-great thanks :) Im already has been tired to find solution in f*kin Inet. Its upperas after upgrade Debian from Jessie to Stretch. Solved by switch off option in /etc/mke2fs.conf in section ext4







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                          answered 10 mins ago









                          Stra TegerStra Teger

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