EXA8 Storage

EXA8

Storage

The EXA8 Provides several internal and external storage options, with built-in USB and SDCard slots.

Please check and confirm the actual device name before proceeding!

SD-MMC

mount /dev/mmcblk0p2 /mnt/mmvblk0p2

USB

mount /dev/sdb1 /mnt/sdb1

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Root Filesystem

Please check and confirm the actual device name before proceeding!

Backup OS

Create your own rootfs tgz image as follows:

mount /dev/mmcblk1p2 /mnt/rootfs
cd /mnt/rootfs
tar vczf /rootfs.tgz *

Restore OS

Deploy rootfs to ext4 partition (will destroy all data!)

mkfs.ext4 /dev/mmcblk1p2
mount /dev/mmcblk1p2 /mnt/rootfs
tar -xvf taskit-rootfs.tar -C /mnt/rootfs

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U-Boot

The EXA8 SOC is powered by U-Boot and can easily be managed throught console port.

NOTE: The Boot procedure and init procedures can be stopped only through console!

Boot from MMC

To temporarily boot your OS from MMC w/o saving settings, use the following example:

setenv bootargs "bootargs=console=ttyAMA0,115200n8 earlycon=pl011,0x87e028000000 debug maxcpus=4 rootwait rw root=/dev/mmcblk0p2 coherent_pool=16M"
boot

Boot from USB

To temporarily boot your OS from USB w/o saving settings, use the following example:

setenv bootargs "bootargs=console=ttyAMA0,115200n8 earlycon=pl011,0x87e028000000 debug maxcpus=4 rootwait rootfstype=ext4 rw noatime root=/dev/sdb2 coherent_pool=16M"
boot

Optimize EXT4 for Solid-State and USB Devices

tune2fs -o journal_data_writeback /dev/sdb2
tune2fs -m 0 /dev/sdb2
tune2fs -O ^has_journal /dev/sdb2