Customize storage features

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Mount the file system

/dev/sda3 on /usr type ext4 (ro,relatime,inlinecrypt)

1. Mount /dev/sda3 to /data.
   mkdir /tmp/data
   
   mount -o rw,remount /
   
   mount -t ext4 /dev/sda3 /tmp/data
   
2. Verify whether the /dev/sda3 partition is mounted.
   df -ah
   
   Output:
   ...
   Filesystem     Size    Used  Avail  Use%  Mounted on
   
   /dev/sda3      108.2G  3.7G  99.9G  4%    /tmp/data
   
3. Mount a file system with specific SELinux context options.
   mount -o rootcontext=system_u:object_r:etc_t:s0 -t ext4 /dev/sda3 /home/root/data
   

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Mount the SD card to a specific path

1. Remount the root partition as read or write-enabled.
   mount -o rw,remount /
   
2. Create an SD card directory.
   mkdir sdcard
   
3. Locate the default path for the SD card directory.
   root@qcs6490-rb3gen2-vision-kit:~# pwd
   
   Output:
   / (<-- default path)
   
4. If the SD card isn’t formatted as VFAT, format it using the following command.
   mkfs.vfat /dev/mmcblk1p1
   
5. Mount the SD card to the default path (/sdcard).
   mount -t vfat /dev/mmcblk1p1 /<default_path>/sdcard
   
   If the SD card has multiple partitions, repeat step 4 to mount each partition.
6. Verify whether the SD card is mounted.
   df -a
   
   Output:
   ...
   Filesystem      Size    Used  Avail  Use%  Mounted on
   /dev/mmcblk1p1  511.0M  4.0K  511.0M  0%   /sdcard
   

​

Mount the NVMe card

1. Create a partition table by running the following command.
   fdisk /dev/nvme0n1
   
   Output:
   Command (m for help): i
   No partition is defined yet!
   Command (m for help): n
   Partition type
   p   primary (0 primary, 0 extended, 4 free)
   e   extended (container for logical partitions)
   Select (default p):  (press enter)
   Using default response p.
   Partition number (1-4, default 1):  (press enter)
   First sector (2048-1953525167, default 2048):  (press enter)
   Last sector, +/-sectors or +/-size{K,M,G,T,P} (2048-1953525167, default 1953525167):
   Created a new partition 1 of type 'Linux' and of size 931.5 GiB.
   Command (m for help): w
   The partition table has been altered.
   Syncing disks.
   root@lemans:~#
   
2. Reboot the board.
   Locate the mkfs.ext4 binary at /usr/sbin/mkfs.ext4.
3. Format the /dev/nvme0n1p1 partition.
   mkfs.ext4 /dev/nvme0n1p1
   
   Output:
   mke2fs 1.46.5 (30-Dec-2021)
   Discarding device blocks: done
   Creating filesystem with 244190390 4k blocks and 61054976 inodes
   Filesystem UUID: 94ca7f8e-eb27-45ce-84f6-67f0cf977ca8
   Superblock backups stored on blocks:
   32768, 98304, 163840, 229376, 294912, 819200, 884736, 1605632, 2654208,
   4096000, 7962624, 11239424, 20480000, 23887872, 71663616, 78675968,
   102400000, 214990848
   Allocating group tables: done
   Writing inode tables: done
   Creating journal (262144 blocks): done
   Writing superblocks and filesystem accounting information: done
   
4. Mount the NVMe partition1 to the media folder.
   mount /dev/nvme0n1p1 /media
   
5. Verify whether the nvme0n1p1 partition is mounted.
   df -a
   
   Output:
   ...
   Filesystem      Size  Used  Avail  Use%  Mounted on
   /dev/nvme0n1p1  458G   28K  435G   1%    /var/rootdirs/media