If you have enough RAM to overlay a writable (and volatile) filesystem in ram over the readonly filesystem on the USB drive, to hold swap, and to give SBS and the OS enough "normal" RAM you should have a very fast system. I guess 4 GB begins to put you on the safe side (unless you,re running a headless/minimal OS). Could be much less, Touch only runs with 256MB or RAM AFAIK. There are kernel options at compile/runtime that will let you specify the way the Linux kernel manages RAM. On a desktop it will use up all RAM to cache old pages and fill the swap; on an embedded machine you'll try avoiding swap (or removing it) and discarding old pages quickly, as everything is in RAM anyway.
I'm not up to speed on the embedded distributions. FreeNAS will work like that (and persist settings to the USB key, nice) but this is BSD with a web interface so you'd have to rely on a special package of SBS. Michael usually packages one. You could also look at Voyage Linux which is a Debian distro tweaked for embedded environments. Or go wild and use Debian's Live USB package to install a custom system on a USB key (probably the most work-intensive option). BTW, In this kind of setup you'd better not use hibernate ;) -- epoch1970 Daily dose delivered by: 3 SB Classic, 1 SB Boom iPeng (iPhone + iPad) SqueezeCenter 7.4.2 (Debian 5.0) with plugins: MusicIP Server Power Control by Gordon Harris WeatherTime by Martin Rehfeld IRBlaster by Gwendesign (Felix) Find cover art by bpa BBC iPlayer, SwitchPlayer by Triode PowerSave by Jason Holtzapple TrackStat, Song Info, Song Lyrics by Erland Isaksson SaverSwitcher, ContextMenu by Peter Watkins. ------------------------------------------------------------------------ epoch1970's Profile: http://forums.slimdevices.com/member.php?userid=16711 View this thread: http://forums.slimdevices.com/showthread.php?t=89100
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