The fastest disk I/O on trimslice, based on my testing, is via iSCSI
over the ethernet port. It can do gigE (125MByte/sec) where usb/sata
on arm seems to be limited to 27 MByte/sec or so (37 MByte/sec on
intel i7).
http://www.delorie.com/arm/trimslice/iscsi.html (old)