In Linux 1.3.93, this works fine:
dd if=/dev/zero of=/dev/ram0 bs=1k count=1
But 1.3.93 seems to have a limit of 2880 kB.
kernel: end_request: I/O error, dev 01:00, sector 5760
In Linux 1.99.12, writes to /dev/ram0 won't work at all.
kernel: end_request: I/O error, dev 01:00, sector 0
The device is correct according to the device list, /proc tells me
that it is in the kernel, I'm not out of ram, I do have permission
to write to the device... What happened?