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Wipefs raspbian8/12/2023 ![]() When you ran sudo mdadm -Cv /dev/md0 -l1 -n2 /dev/sd1, you got lucky: it failed. When it came back online, the Linux md subsystem saw it as a new RAID volume not belonging to any known array, and set it up as /dev/md127. Based on the fragmentary output you've provided, I suspect /dev/sdb1 suffered a transient fault (most likely a hiccup of the Pi's USB system) and was marked as failed. What happened is your RAID array fell apart. How can I set the RAID up again, where does md127 come from and what causes this error? Mdadm: cannot open /dev/sda1: Device or resource busy Mdadm: super1.x cannot open /dev/sda1: Device or resource busy ![]() When I try to set up the RAID again with sudo mdadm -Cv /dev/md0 -l1 -n2 /dev/sd1, I get the error: Persistence : Superblock is persistent Update Time : Sun Jan 7 14:38:47 2018 The output of sudo mdadm -detail /dev/md127 is: Spare Devices : 0 Name : raspberrypi:0 (local to host raspberrypi) Persistence : Superblock is persistent Update Time : Sun Jan 7 14:37:23 2018 When I run sudo mdadm -detail /dev/md0 I get the following: When I run sudo fdisk -l I found both devices sda and sdb.Īlso there is /dev/md0 with size of 2000.3 GB, but there is also /dev/md127 with size 2000.3 GB. The next day my uploads failed with error code 4 (no further error text). added AUTOSTART=true to /etc/default/mdadmĮverything went well and I could upload my files to /media/nas with WinSCP.edited /etc/fstab with /dev/md0 /media/nas ext4 4 0 0.mounted /dev/md0 to /media/nas with sudo mount /dev/md0 /media/nas.formatted /dev/md0 with sudo mkfs /dev/md0 -t ext4.set up RAID 1 to /dev/md0 with sudo mdadm -Cv /dev/md0 -l1 -n2 /dev/sd1.found both devices with sudo fdisk -l (as /dev/sda and /dev/sdb).installed mdadm with apt-get install mdadm.Unfortunately I am not an expert at Linux und commands. Input/output error during write on /dev/sdaĭelete Logical Partition (unknown, 12.22 GiB) from /dev/sda 00:04:44 ( SUCCESS )ĭelete Logical Partition (fat32, 256.00 MiB) from /dev/sda 00:01:28 ( SUCCESS )ĭelete Logical Partition (ext4, 32.00 MiB) from /dev/sda 00:01:31 ( SUCCESS )ĭelete /dev/sda2 (extended, 12.I was setting up a RAID 1 with mdadm at my RaspberryPi with two drives (both 2 TB and formatted with exFAT, both with independent power supplies), but I ran into an error. GParted 0.32.0 -enable-libparted-dmraid -enable-online-resizeĭelete /dev/sda1 (fat32, 2.37 GiB) from /dev/sda 00:07:14 ( SUCCESS ) Is the card bricked? If so then why it's partitions are shown in devices it's connected to? Any way to fix it or have to cut my losses here? Old Nokia phone-> it just hangs while trying to 'read' the cardĭigital camera-> It says it has formatted the card but then on viewfinder screen, it displays card error. They give Cyclic Redundancy Error, so does DISKPART command line utility when asked to 'clean'Īndroid-> Samsung phone tries to format the card but gets stuck at 20% and after a while reboots, to no effect on the card ![]() Even partition managers such as AMOEI, EASUS, don't work. ![]() Windows-> Both 7 and 10 are unable to format it. Have tried these fixes on both Raspbian and Elementary OS live environment. Linux-> tried Gparted and fdisk method but doesn't formats, gives I/O error as reason Attaching dump file of Gparted alongwith a screenshot of both. The card that got corrupted isn't undergoing format and I have tried most of the fixes given on Internet Had a another card so got Raspbian installed on it. Didn't knew about undervolting it so long story short, my SD card got corrupted as I powered off the device while NOOBS was installing Raspbian on it. Had watched many YouTube videos about initial setup of Pi 4 thus went accordingly. Couple of days back I got a Raspberry Pi 4.
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