Hello, I want test a redundancy scenario with RAID 1. I have crated an array with mdadm and formatted ext4 and after mounting I have written a text file. Now I want to switch off one device, and with another remaining device I expect to view the text file. When I issue mdadm --detail it shows the State as active,FAILED,Not Started. But in dmesg I can't find any error message from md related to one of the physical disk missing. I was searching about this and I found some references of creating degraded RAID 1 with missing parameter in mdadm, but what I want to simulate is that let's say one of the disk has gone bad and not yet being detected under /dev and in this case we want to verify that if data is intact. Regards, Arka -- 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