I have a 2811 running 12.4(4)T8
It says it has 256 MB RAM and 61 MB Flash!!??
I need to upgrade to an IOS, but all require 64 MB Flash.
According to the data sheet for this router, they should come with 128 MB Flash.
I only have remote access to this router and via SSH or SDM and it says 61 MB Flash.
I don't want to reboot the router with an image requiring 64 MB Flash (which are all the images) if it's going to die on me.
If you issue a "show file system" command, you will know the actual bytes
available. Sometimes, due to formatting, you may not see the full capacity
in the output. The image/SDM you are loading will be smaller than 64 MB. So,
it should be safe to load the new image onto the device.