Help with RAID10 disk failure, BTRFS replace won't start

@straighttalk86 wrote:

Brief description of the problem

I have a drive that failed in a 4 disk RAID10 pool. I have been following the Data Lossa Raid 1 documentation without any luck. The drive is completely dead so it doesn’t register as a device anymore. I mount the pool and run the replace:

btrfs replace start 1 /dev/sdf /mnt2/raider10

But when i look at the status it says ‘Never started’. It won’t let me mount the pool as RW, an error is thrown

Detailed step by step instructions to reproduce the problem

fdisk -l 

Disk /dev/sda: 1000.2 GB, 1000204886016 bytes, 1953525168 sectors
Units = sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 4096 bytes
I/O size (minimum/optimal): 4096 bytes / 4096 bytes
Disk label type: dos
Disk identifier: 0x00017bcd

   Device Boot      Start         End      Blocks   Id  System
/dev/sda1   *        2048     1026047      512000   83  Linux
/dev/sda2         1026048     5222399     2098176   82  Linux swap / Solaris
/dev/sda3         5222400  1953523711   974150656   83  Linux

Disk /dev/sdb: 2000.4 GB, 2000398934016 bytes, 3907029168 sectors
Units = sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes


Disk /dev/sdc: 2000.4 GB, 2000398934016 bytes, 3907029168 sectors
Units = sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 4096 bytes
I/O size (minimum/optimal): 4096 bytes / 4096 bytes


Disk /dev/sdd: 2000.4 GB, 2000398934016 bytes, 3907029168 sectors
Units = sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 4096 bytes
I/O size (minimum/optimal): 4096 bytes / 4096 bytes


Disk /dev/sde: 1000.2 GB, 1000204886016 bytes, 1953525168 sectors
Units = sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 4096 bytes
I/O size (minimum/optimal): 4096 bytes / 4096 bytes


Disk /dev/sdf: 3000.6 GB, 3000592982016 bytes, 5860533168 sectors
Units = sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes


btrfs fi show

Label: 'rockstor_rockstor'  uuid: 9a41126b-4153-42d4-b106-ff205d2f260e
        Total devices 1 FS bytes used 2.47GiB
        devid    1 size 929.02GiB used 5.04GiB path /dev/sda3

Label: 'raider10'  uuid: 182033a2-cad6-4a4f-aece-1a8ddf038736
        Total devices 4 FS bytes used 407.76GiB
        devid    2 size 1.82TiB used 206.04GiB path /dev/sdc
        devid    3 size 1.82TiB used 207.01GiB path /dev/sdd
        devid    4 size 1.82TiB used 207.01GiB path /dev/sdb
        *** Some devices missing

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