Firmware/Storage/Size

How to find the size of the internal storage on an XO-1.5, XO-1.75 or XO-4.

Bring up the ok prompt. The firmware banner shows the internal storage size. For instance on an XO-4 made with an 8GB eMMC, the banner shows:

OLPC 4B1, 1196 MHz, 2 GiB memory, 8 GB internal storage, S/N SHC2380007F
OpenFirmware  Q7B37   EC Firmware 0.4.10   2014-01-02 00:06:43 UTC

ok █

Or, the exact size in bytes can be displayed:

ok decimal internal-disk-size d.
7952400384
ok █