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Operating Systems Linux Ubuntu Samba share on software raid1 Post 303022471 by tomislav91 on Saturday 1st of September 2018 10:57:23 AM
Quote:
Originally Posted by tomislav91
sorry i don't write it.
Yeah, ofcourse.
this is output
Code:
sudo update-initramfs -u
update-initramfs: Generating /boot/initrd.img-4.10.0-19-generic

i have notices that in conf file array is /dev/md/0

Code:
ARRAY /dev/md/0 metadata=1.2 name=johna:0 UUID=bd34d949:34a3999d:949d6038:a871e1c1

------ Post updated at 06:41 AM ------

i also cant access to my data after deattach one hard drive.

------ Post updated at 06:43 AM ------

THis is output of mdstat
Code:
root@myuser:/mnt/raid/test# cat /proc/mdstat
Personalities : [raid1] [linear] [multipath] [raid0] [raid6] [raid5] [raid4] [raid10]
md0 : active raid1 sdc[1] sdb[0]
      1953383488 blocks super 1.2 [2/2] [UU]
      bitmap: 0/15 pages [0KB], 65536KB chunk

unused devices: <none>

------ Post updated at 07:23 AM ------

i now do it like this
Link
i delete array and added like in example. No errors found.
I can see that it is monuted
Code:
Filesystem                   Size  Used Avail Use% Mounted on
/dev/mapper/johnas--vg-root  223G  1.4G  210G   1% /
/dev/md0                     1.8T  898M  1.7T   1% /mnt/md0

Code:
lsblk -o NAME,SIZE,FSTYPE,TYPE,MOUNTPOINT
NAME                    SIZE FSTYPE            TYPE  MOUNTPOINT
sda                   232.9G                   disk
└─sda1                232.9G LVM2_member       part
  ├─johnas--vg-root     227G ext4              lvm   /
  └─johnas--vg-swap_1   5.9G swap              lvm   [SWAP]
sdb                     1.8T linux_raid_member disk
└─md0                   1.8T ext4              raid1 /mnt/md0
sdc                     1.8T linux_raid_member disk
└─md0                   1.8T ext4              raid1 /mnt/md0

I am now waiting to sync and try again to deattach disks and try to copy for example to /home/johnas/something, to see if it is good to go or not.
Just one question.
If I deattach one disk, and restart, it should be also in md0 because i added it in fstab.
Quote:
Originally Posted by Aia
I do not know if you have tried already any of the following commands to fail a drive, instead of forcefully removing it.

Code:
mdadm /dev/md0 -f /dev/sdc

Check the result
Code:
mdadm --detail /dev/md0

Remove the failed drive
Code:
mdadm /dev/md0 -r /dev/sdc

Check the result
Code:
mdadm --detail /dev/md0

Afterward you can add it back and check the result again and see it recover.

Code:
mdadm /dev/md0 -a /dev/sdc

[CODE]
Code:
mdadm /dev/md0 -a /dev/sdc

[/QUOTE]


Code:
root@myuser:/home/myuser# mdadm /dev/md0 -f /dev/sdc
mdadm: set /dev/sdc faulty in /dev/md0
root@myuser:/home/myuser# mdadm --detail /dev/md0
/dev/md0:
        Version : 1.2
  Creation Time : Fri Aug 31 14:17:31 2018
     Raid Level : raid1
     Array Size : 1953383488 (1862.89 GiB 2000.26 GB)
  Used Dev Size : 1953383488 (1862.89 GiB 2000.26 GB)
   Raid Devices : 2
  Total Devices : 2
    Persistence : Superblock is persistent

  Intent Bitmap : Internal

    Update Time : Sat Sep  1 16:42:36 2018
          State : clean, degraded
 Active Devices : 1
Working Devices : 1
 Failed Devices : 1
  Spare Devices : 0

           Name : myuser:0  (local to host myuser)
           UUID : bb96aaed:688c6f5c:970569cb:092e37f9
         Events : 3655

    Number   Major   Minor   RaidDevice State
       0       8       16        0      active sync   /dev/sdb
       -       0        0        1      removed

       1       8       32        -      faulty   /dev/sdc
root@myuser:/home/myuser# mdadm /dev/md0 -r /dev/sdc
mdadm: hot removed /dev/sdc from /dev/md0
root@myuser:/home/myuser# mdadm --detail /dev/md0
/dev/md0:
        Version : 1.2
  Creation Time : Fri Aug 31 14:17:31 2018
     Raid Level : raid1
     Array Size : 1953383488 (1862.89 GiB 2000.26 GB)
  Used Dev Size : 1953383488 (1862.89 GiB 2000.26 GB)
   Raid Devices : 2
  Total Devices : 1
    Persistence : Superblock is persistent

  Intent Bitmap : Internal

    Update Time : Sat Sep  1 16:42:48 2018
          State : clean, degraded
 Active Devices : 1
Working Devices : 1
 Failed Devices : 0
  Spare Devices : 0

           Name : myuser:0  (local to host myuser)
           UUID : bb96aaed:688c6f5c:970569cb:092e37f9
         Events : 3656

    Number   Major   Minor   RaidDevice State
       0       8       16        0      active sync   /dev/sdb
       -       0        0        1      removed

root@myuser:/home/myuser# mdadm /dev/md0 -a /dev/sdc
mdadm: re-added /dev/sdc
root@myuser:/home/myuser# mdadm --detail /dev/md0
/dev/md0:
        Version : 1.2
  Creation Time : Fri Aug 31 14:17:31 2018
     Raid Level : raid1
     Array Size : 1953383488 (1862.89 GiB 2000.26 GB)
  Used Dev Size : 1953383488 (1862.89 GiB 2000.26 GB)
   Raid Devices : 2
  Total Devices : 2
    Persistence : Superblock is persistent

  Intent Bitmap : Internal

    Update Time : Sat Sep  1 16:43:29 2018
          State : clean
 Active Devices : 2
Working Devices : 2
 Failed Devices : 0
  Spare Devices : 0

           Name : myuser:0  (local to host myuser)
           UUID : bb96aaed:688c6f5c:970569cb:092e37f9
         Events : 3660

    Number   Major   Minor   RaidDevice State
       0       8       16        0      active sync   /dev/sdb
       1       8       32        1      active sync   /dev/sdc

Code:
root@myuser:/home/myuser# mdadm /dev/md0 -f /dev/sdb
mdadm: set /dev/sdb faulty in /dev/md0
root@myuser:/home/myuser# mdadm --detail /dev/md0
/dev/md0:
        Version : 1.2
  Creation Time : Fri Aug 31 14:17:31 2018
     Raid Level : raid1
     Array Size : 1953383488 (1862.89 GiB 2000.26 GB)
  Used Dev Size : 1953383488 (1862.89 GiB 2000.26 GB)
   Raid Devices : 2
  Total Devices : 2
    Persistence : Superblock is persistent

  Intent Bitmap : Internal

    Update Time : Sat Sep  1 16:46:27 2018
          State : clean, degraded
 Active Devices : 1
Working Devices : 1
 Failed Devices : 1
  Spare Devices : 0

           Name : myuser:0  (local to host myuser)
           UUID : bb96aaed:688c6f5c:970569cb:092e37f9
         Events : 3672

    Number   Major   Minor   RaidDevice State
       -       0        0        0      removed
       1       8       32        1      active sync   /dev/sdc

       0       8       16        -      faulty   /dev/sdb
root@myuser:/home/myuser# mdadm /dev/md0 -r /dev/sdb
mdadm: hot removed /dev/sdb from /dev/md0
root@myuser:/home/myuser# mdadm --detail /dev/md0
/dev/md0:
        Version : 1.2
  Creation Time : Fri Aug 31 14:17:31 2018
     Raid Level : raid1
     Array Size : 1953383488 (1862.89 GiB 2000.26 GB)
  Used Dev Size : 1953383488 (1862.89 GiB 2000.26 GB)
   Raid Devices : 2
  Total Devices : 1
    Persistence : Superblock is persistent

  Intent Bitmap : Internal

    Update Time : Sat Sep  1 16:46:37 2018
          State : clean, degraded
 Active Devices : 1
Working Devices : 1
 Failed Devices : 0
  Spare Devices : 0

           Name : myuser:0  (local to host myuser)
           UUID : bb96aaed:688c6f5c:970569cb:092e37f9
         Events : 3673

    Number   Major   Minor   RaidDevice State
       -       0        0        0      removed
       1       8       32        1      active sync   /dev/sdc
root@myuser:/home/myuser# mdadm /dev/md0 -a /dev/sdb
mdadm: re-added /dev/sdb
root@myuser:/home/myuser# mdadm --detail /dev/md0
/dev/md0:
        Version : 1.2
  Creation Time : Fri Aug 31 14:17:31 2018
     Raid Level : raid1
     Array Size : 1953383488 (1862.89 GiB 2000.26 GB)
  Used Dev Size : 1953383488 (1862.89 GiB 2000.26 GB)
   Raid Devices : 2
  Total Devices : 2
    Persistence : Superblock is persistent

  Intent Bitmap : Internal

    Update Time : Sat Sep  1 16:46:55 2018
          State : clean
 Active Devices : 2
Working Devices : 2
 Failed Devices : 0
  Spare Devices : 0

           Name : myuser:0  (local to host myuser)
           UUID : bb96aaed:688c6f5c:970569cb:092e37f9
         Events : 3677

    Number   Major   Minor   RaidDevice State
       0       8       16        0      active sync   /dev/sdb
       1       8       32        1      active sync   /dev/sdc

------ Post updated at 09:55 AM ------

I tried to do
Code:
mdadm /dev/md0 -f 
/dev/sdc mdadm /dev/md0 -r /dev/sdc

and login to share folder via Windows, and put, download and delete files, and then add disk, then try again, then do it with /dev/sdb, and everything went ok.

So, from how i can see, it it ok.

------ Post updated at 09:57 AM ------

So from this i can be sure that files are on the disks? Can I check it somehow? Or this is a good test for it.
 
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