Hi, I am going through the process of replacing a bad drive in a RAID 1 mirror. The filesystem wouldn't mount because of the missing device, and the btrfs man pages were not helpful in resolving it. Specifically, it would have been very useful to me if this part of the wiki were included somewhere: https://btrfs.wiki.kernel.org/index.php/Using_Btrfs_with_Multiple_Devices#Replacing_failed_devices There is no mention in the man pages of the -o degraded mount option, which is needed to even manipulate the filesystem; nor is there any mention of the special option "missing" for device delete. I'm sure I'm not the only one who would turn to man btrfs first when facing a failed drive. Thanks, Per -- To unsubscribe from this list: send the line "unsubscribe linux-btrfs" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html