Hello Shaun, Monday, August 28, 2017, 11:00:02 AM, you wrote: > I need to recover a file from a bcache disk that won't mount, the > underlying fs is btrfs. I'd like to read the btrfs partition directly > by skipping the bcache data with dd skip=#, but I need to know how > much data to skip. Can anyone help me out? Bcache tools include a program called bcache-super-show, it shows various values from the cache or backing device superblock. In particular, there is the "dev.data.first_sector" value which is what you want. In my case, it shows: dev.data.first_sector 16 Which means that the underlying data begins from 16-sector (8-kilobyte) offset of the backing device. Pavel Goran -- To unsubscribe from this list: send the line "unsubscribe linux-bcache" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
