Difference between revisions of "Failsafe"
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* you need a network connection with a server that can receive the backup (for example with [[NFS]], here mounted on ''/mnt/nfs/''): | * you need a network connection with a server that can receive the backup (for example with [[NFS]], here mounted on ''/mnt/nfs/''): | ||
<pre class="apf"> | <pre class="apf"> | ||
| − | # dd if=/dev/mmcblk2 bs= | + | # dd if=/dev/mmcblk2 bs=512 count=7733248 conv=noerror,sync | pv | gzip -c -9 > /mnt/nfs/root.bak.gz |
</pre> | </pre> | ||
* wait some minutes until backup is done ;-) | * wait some minutes until backup is done ;-) | ||
Revision as of 13:57, 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 rootfs
- 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/root.bak.gz
- wait some minutes until backup is done ;-)
Restore eMMC rootfs from backup
- same principle:
# gunzip -c /mnt/nfs/root.bak.gz | pv | dd of=/dev/mmcblk2 conv=sync,noerror bs=128K
