Opened 5 years ago

Last modified 4 years ago

#13414 new enhancement

Mikrotik RB493G: initramfs image missing in binary firmware releases

Reported by: renne Owned by: developers
Priority: normal Milestone: Barrier Breaker 14.07
Component: base system Version:
Keywords: Cc: rene@…


To flash the Mikrotik Routerboard RB493G with OpenWRT an initramfs image has to be booted via TFTP. That initramfs image exists for 12.09-beta2 (, but not for RC1, RC2 and todays main AA release.

Please add the initramfs image to simplify flashing RB493G boards with OpenWRT.

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Change History (5)

comment:1 Changed 5 years ago by anonymous

Whats preventing you from using the beta2 image to flash them?

comment:2 Changed 5 years ago by renne

If I remind well, 12.09-beta2 doesn't support the newer batches with Toshiba-NAND, yet - which means you can't flash them.

comment:3 follow-up: Changed 5 years ago by anonymous

I agree having a openwrt-ar71xx-nand-vmlinux-initramfs.elf for my new RB493G would make things easier. beta2 works via netboot. However final gives me a kernel panic via netboot. I am assuming I can install beta2 and then upgrade to final. Is this right?

comment:4 in reply to: ↑ 3 Changed 5 years ago by renne

Replying to anonymous:

I am assuming I can install beta2 and then upgrade to final. Is this right?

Yes and no. You cannot upgrade anything on the RB493G. If you want to update to a newer release, you have to save the settings, create a list of installed packages, erase the flash, boot an initramfs-image, install OpenWrt via wget2nand, install all missing packages and restore the saved configuration. You cannot use wget2nand from a system running from NAND but only from a system booted via TFTP.

For the first installation of OpenWrt connect the RB493G via console, reboot it, erase the NAND flash, switch to boot via network, provide beta2 (openwrt-ar71xx-nand-vmlinux-initramfs.elf) via TFTP, login to OpenWrt and install 12.09 main release via wget2nand.

comment:5 Changed 4 years ago by jow

  • Milestone changed from Attitude Adjustment 12.09 to Barrier Breaker 14.07

Milestone Attitude Adjustment 12.09 deleted

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