live_ram: ok on esata/ssd keys, not working on older usb keys

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http://forums.fedoraforum.org – Hello, I've prepared my livecd iso that installs well on usb3.0 ssd or esata keys (that have usb and esata interface). Those keys can be booted normally and with option "live_ram" without problems. When installing same iso on usb 2.0 keys the booting works well without the "live_ram" option. However, when "live_ram" option is added to kernel parameters, the booting drops to dracut with something like [56.056673] sdb detected capacity change from 64000000 to 0 Obviously the keys gets ejected somehow too early in the presence of "live_ram" op (HowTos)