I’ve formatted a 16GB micro SD and used swapon to enable swap, but as /etc/config/fstab doesn’t exist, where do i set swap to be enabled at boot?
Hi this is not difficult.
Here is the instructions: Fstab Configuration [Old OpenWrt Wiki]
I verified. You can just do:
opkg update opkg install block-mount block detect > /etc/config/fstab vi /etc/config/fstab # Please check the option enabled '0' and change all '0' to '1' /etc/init.d/fstab enable block mount
And it is done
The issue with installing block-mount and using fstab is that hot plug and mounting of USB block devices stop working. I’ve tried twice now with the same results.
Any suggestions?
Yes. This is a problem. This is why we didn’t use block-mount.
The hotplug script is /etc/hotplug.d/block/01-mount
After you install block-mount, the content will be replaced by only one line: block mount
You can modify this script to (suppose you only have up to 2 disks, if you have more, just add more uci command).
But I didn’t try this.
block detect > /etc/config/fstab uci set fstab.@mount[0].enabled='1'
uci set fstab.@mount[1].enabled='1'
uci set fstab.@swap[0].enabled='1'
uci commit fstab
block mount
For anyone else looking to enable swap. I found the following solution works best as it enables swap at boot and maintains the hotplug mount of usb block devices.
-
Take a copy of /etc/hotplug.d/block/10-mount
-
Install block-mount package
opkg update
opkg install block-mount
block detect > /etc/config/fstab
vi /etc/config/fstab
Please check the option enabled ‘0’ and change swap ‘0’ to ‘1’
- Copy /etc/hotplug.d/block/10-mount back and reboot.
To check swap is enabled, use free. It will show you the free/used space of swap. If under the free heading shows 0, then swap is not enabled.
Thanks for sharing.