Theodore Tso wrote: > > Yeah, but the ext3 journal wears out the flash card much more quickly. Since you know better than anyone how ext3 works can you quantify what means 'much more quickly' with default date=ordered mode? 2x 10x 100x ? My only information is from http://www.redhat.com/support/wpapers/redhat/ext3/ Also I suppose the basic IT200x system is somewhat optimized for writes so typically the amount of data written is not exactly huge. We are also mounting mmc with 'noatime'. > Given how cheap 2GB cards are, maybe we don't care Yes, they are cheap and I guess internal wear levelling should be pretty good to allow 'lifetime' guarantee with FAT filesystem. Check also (end of) https://bugs.maemo.org/show_bug.cgi?id=598 Also cards are getting bigger quickly so most people are not using the card for long (like >3 years) but upgrade to bigger cards. > but given how > quick e2fsck is on a 2GB flash disk, another approach would be modify > the boot script so that it detects if the root filesystem is ext2, and > if it is unclean, force an fsck automatically. This is slightly problematic. There is no fsck in initfs partition and space is really tight there. Also we have no keyboard so realistically -y is the only option which may sometimes do something wrong. From the manpage: ... Sometimes an expert may be able to do better driving the fsck manually. ... AUTHOR Theodore Tso Anyway, isn't mount with data=writeback (and possibly also commit=30) same or better for data integrity (or in kernel fsck chance to do right thing at boot time) than pure ext2 with e2fsck? Frantisek
