DDWRT and Swap Files

1. 1. 1. USB ###############################################################################################################################################
3. Instead of issuing USB related commands via script, the USB services for Flash Drives, etc. are enabled via the GUI

1. 1. 1. Swap File##########################################################################################################################################
3. A "raw" swap file must be initially configured
4. The following is a BusyBox command that creates a file with the size dictated by the attributes (if is the source file, of is the output file, bs are the number of bytes to read at a time, count is the number of times to repeat the cycle)
5. In the following example, a 256 MB file is created
6. dd if=/dev/zero of=/tmp/mnt/sda_part2/SwapFile bs=1024 count=262144
8. To enable the OS / Router to use a swap file, the swap utilities need to be installed
9. opkg install swap-utils: mkswap and swapon
11. The following command "formats" / prepares the RAW / Blank file as a swap file with the label SwapFile
12. mkswap /tmp/mnt/sda_part2/SwapFile --label SwapFile

1. The swapon command recommends the following
2. chmod 600 /tmp/mnt/sda_part2/SwapFile

1. Activates the swap file and makes it available to the OS

swapon /tmp/mnt/sda_part2/SwapFile

1. Deactivates the swap file / turns it off
2. swapoff /tmp/mnt/sda_part2/SwapFile
4. If the USB related services are installed via OPKG and controlled via the /opt/etc/init.d Directory, then there seems to be documentation that indicates the above can be controlled via the S30 USB service)