Difference between revisions of "Failsafe"
From ArmadeusWiki
(→Backup eMMC rootfs) |
(→Restore eMMC rootfs from backup) |
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* wait some minutes until backup is done ;-) | * wait some minutes until backup is done ;-) | ||
| − | ===Restore eMMC | + | ===Restore eMMC from backup=== |
* same principle: | * same principle: | ||
<pre class="apf"> | <pre class="apf"> | ||
| − | # gunzip -c /mnt/nfs/ | + | # gunzip -c /mnt/nfs/emmc.bak.gz | pv | dd of=/dev/mmcblk2 conv=sync,noerror bs=512 count=7733248 |
</pre> | </pre> | ||
==Links== | ==Links== | ||
* | * | ||
Revision as of 13:58, 6 August 2015
Contents
Intro
Failsafe is the short name for the RAM bootable rescue image for APF boards (APF6 only for the moment). It is a Linux kernel + minimal initrd image all packed together in a standard apf6-linux.bin.
Installation
Generate it
$ make apf6failsafe_defconfig $ make $ cp buildroot/output/images/apf6-linux.bin /tftpboot/
Launch it
BIOS> run ramboot
Cool stuff that can be done with it
apf-config
# apf-config
- check eMMC filesystem
Backup eMMC
- you need a network connection with a server that can receive the backup (for example with NFS, here mounted on /mnt/nfs/):
# dd if=/dev/mmcblk2 bs=512 count=7733248 conv=noerror,sync | pv | gzip -c -9 > /mnt/nfs/emmc.bak.gz
- wait some minutes until backup is done ;-)
Restore eMMC from backup
- same principle:
# gunzip -c /mnt/nfs/emmc.bak.gz | pv | dd of=/dev/mmcblk2 conv=sync,noerror bs=512 count=7733248
