In a few earlier postings I indicated the problems I had with EXT4 and a hard drive that was about 75% full (320gig at 75%). Performance was such that simple uploads or downloads crawled to a 10k / second pace, or even stalled for long periods of time.
I read an article about btfrs and how it is designed as copy on write. That is, write the new data, then change the B tree to point to the new sub-tree of data. Ergo, if someone inadvertantly pulls out the drive's plug from the USB physical port, we are almost guaranteed to not have drive corruption. There may be some data loss, but no drive corruption. That to me is most important. I am not certain about storage efficiencies. Would 10gigs of data with EXT4 use less diskspace than 10 gigs of data stored in btfrs format. (What's a gig when terrabyte drives sell for around $60.00. Leslie
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