Le 13/05/2013 16:29, Harald Glatt a écrit :
On Mon, May 13, 2013 at 4:15 PM, Vincent <vincent@xxxxxxxxxxxxxxx> wrote:Hello, I am on Ubuntu Server 13.04 with Linux 3.8. I've created a "single-raid" using /dev/sd{a,b,c,d}{1,3}. One of my hard drives has failed, I mean it's materially dead. :~$ sudo btrfs filesystem show Label: none uuid: 40886f51-8c9b-4be1-8721-83bf5653d2a0 Total devices 5 FS bytes used 226.90GB devid 4 size 37.27GB used 31.01GB path /dev/sdd1 devid 3 size 37.27GB used 31.01GB path /dev/sdc1 devid 2 size 37.31GB used 31.00GB path /dev/sdb1 devid 1 size 139.73GB used 132.02GB path /dev/sda3 *** Some devices missing Many tutorials I found about it never mention the simple deletion of a non-remountable disk in case of a "single-raid" (where the datas doesn't matter, I've used the only "d=single" option, insinuating "m=mirrored"). I've read this page http://www.howtoforge.com/a-beginners-guide-to-btrfs until "8 Adding/Deleting Hard Drives To/From A btrfs File System" section. But this page want to make me mount the drive, but it's dead. When my Btrfs partition is not mounted and when I do: :~$ sudo btrfs device delete missing btrfs device delete: too few arguments or :~$ sudo btrfs device delete missing /media/single-raid/ Nothing happen. If I try to mount the failed device, and remove /dev/sde1 from the mountpoint, my console doesn't respond anymore. I've also read the official documentation https://btrfs.wiki.kernel.org/index.php/Using_Btrfs_with_Multiple_Devices#Removing_devices using degraded mode: mount -o degraded /dev/sda3 /media/single-raid/ The fstab line is however: /dev/sda3 /media/single-raid/ btrfs device=/dev/sda3,device=/dev/sdb1,device=/dev/sdc1,device=/dev/sdd1 0 2 Then perform :~$ sudo btrfs filesystem show Label: none uuid: 40886f51-8c9b-4be1-8721-83bf5653d2a0 Total devices 5 FS bytes used 226.30GB devid 4 size 37.27GB used 31.01GB path /dev/sdd1 devid 3 size 37.27GB used 31.01GB path /dev/sdc1 devid 2 size 37.31GB used 31.00GB path /dev/sdb1 devid 1 size 139.73GB used 132.02GB path /dev/sda3 **** Some devices missing* I don't understand why in degraded mode I can't remove the failed device. Could you help me please? -- To unsubscribe from this list: send the line "unsubscribe linux-btrfs" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.htmlIf you have used d=single, it means that the data that was on the drive that failed is now gone. I think btrfs refuses to remove devices if it means data loss, but I could be wrong here..
I've no problem with data loss, I just want to have a kind of sharing area, but data on other drive are always here, why couldn't I retrieve them alive?
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