It appears that delalloc lets me copy 50M of data onto a 30M filesystem; at least I never get ENOSPC back, although I wind up with several files that have 1M length but 0 blocks. I've filed a bug in the kernel bug tracker, I think we could use a central place to track issues: http://bugzilla.kernel.org/show_bug.cgi?id=9329 I'll try to find time to look into this unless someone knows offhand where the problem is... Thanks, -Eric (p.s. should I get ext[234] bug mail routed to this list, or would that be annoying?) - To unsubscribe from this list: send the line "unsubscribe linux-ext4" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html