-------------- Short version: -------------- Needing more space on my (quicker) HW-Raid-10, I wanted to transfer ~850 GiB to a (slower) SW-Raid1. Creation succeded, Transfer succeeded, Compare (diff) succeded, even Reboot succeded; but after Power Off / Boot: all data lost, filesystem only offering an empty "lost+found". I'm _not_ really sure that this strange effect is to be considered a kernel problem or a RAID problem (yet), but thought it might make sense to give a warning. ----- cite ----- [PM] ... there is no evidence of a problem with RAID. The filesystem has lost its contents. So it *looks* like an error with "rm" or "mkfs". It possibly isn't that simple but it doesn't look at all like a RAID problem. NeilBrown ----- /cite ----- [@Neil: Thank you for looking at it and for your comment] I am continung to work on additional experiments, but unfortunately they take soo loong ... I am prepared to provide additional information as requested; proposals how to debug this strange coincidence are welcome. ------------- Long version: Please c.f. ------------- https://bugzilla.kernel.org/show_bug.cgi?id=43791 Yours respecfully Manfred Knick -- To unsubscribe from this list: send the line "unsubscribe linux-raid" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
