portff.blogg.se - Wipefs raspbian

#WIPEFS RASPBIAN INSTALL#
#WIPEFS RASPBIAN UPDATE#
#WIPEFS RASPBIAN CODE#

Manpages-fr-extra: /usr/share/man/fr/man8/wipefs.8.gz Manpages-de: /usr/share/man/de/man8/wipefs.8.gz But in your case apt-file search wipefs is the better choice. If you add a write-intent bitmap, you put temporarily-failed disks back into the array with -re-add rather than -add.Apt-cache is a good idea if you now the package name. This will slow down writes somewhat, as the bitmap needs to be updated, but will greatly speed up recovery, as only the changes need to be copied from one disk to the other. If your setup has a habit of producing temporary failures, consider adding a write-intent bitmap to your array: mdadm -grow /dev/md0 -bitmap=internal. If a drive temporarily falls out of the array, mdadm will see it in the configuration file, and will sit there waiting for you to perform step (4). To prevent this from happening in the future, set up entries describing your array in /etc/mdadm/nf.

Let the computer rebuild the array, copying everything from /dev/sda1.

Put it back into /dev/md0: mdadm /dev/md0 -add /dev/sdb1.

Make /dev/sdb1 not look like a RAID member anymore: wipefs -a /dev/sdb1.

Remove /dev/sdb1 from /dev/md127: mdadm /dev/md127 -fail /dev/sdb1, followed by mdadm /dev/md127 -remove /dev/sdb1.

Inspect the output of mount to verify that it's mounted on /media/nas, and run ls /media/nas to make sure your data is there. Make sure that /dev/md0 really is the live copy of your data.It's far more likely to destroy your data than recover it.Īt this point, your best option is probably to destroy the /dev/md127 array and re-add /dev/sdb1 to /dev/md0. Running mdadm -create is almost never the solution to a RAID problem. 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:

#WIPEFS RASPBIAN UPDATE#

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.

#WIPEFS RASPBIAN CODE#

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).

#WIPEFS RASPBIAN INSTALL#

installed mdadm with apt-get install mdadm.

Unfortunately I am not an expert at Linux und commands. 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.