Skip to main content

Changing My RAID Array, Add A Device And Resync

My previous post discussed removing a block device and partitioning it. 

After creating the 2TB partition I can now add it to the existing array.

$mdadm /dev/md127 --add /dev/sda2        ##to add the 2TB partition (block device) to the array

$mdadm --detail /dev/md127        ##to check status of the array and component device

/dev/md127:
        Version : 1.2
  Creation Time : Tue Sep  6 02:59:21 2016
     Raid Level : raid5
     Array Size : 2929890816 (2794.16 GiB 3000.21 GB)
  Used Dev Size : 976630272 (931.39 GiB 1000.07 GB)
   Raid Devices : 4
  Total Devices : 4
    Persistence : Superblock is persistent

  Intent Bitmap : Internal

    Update Time : Sat Dec  2 10:00:56 2017
          State : clean, degraded, recovering
 Active Devices : 3
Working Devices : 4
 Failed Devices : 0
  Spare Devices : 1

         Layout : left-symmetric
     Chunk Size : 512K

 Rebuild Status : 24% complete

           Name : desktop:0
           UUID : e3284314:1258cac3:1b6c243c:748be2fe
         Events : 8551

    Number   Major   Minor   RaidDevice State
       0       8       33        0      active sync   /dev/sdc1
       1       8       49        1      active sync   /dev/sdd1
       3       8       64        2      active sync   /dev/sde
       4       8        2        3      spare rebuilding   /dev/sda2    ==>> note that mdadm added it as a spare first, with status "rebuilding".

Also check with command,

$sudo less /proc/mdstat

Personalities : [raid6] [raid5] [raid4]
md127 : active raid5 sda2[4] sdd1[1] sdc1[0] sde[3]
      2929890816 blocks super 1.2 level 5, 512k chunk, algorithm 2 [4/3] [UUU_]
      [=====>...............]  recovery = 26.8% (262702200/976630272) finish=102.1min speed=116481K/sec
      bitmap: 0/8 pages [0KB], 65536KB chunk

unused devices: <none>
 
I like this command because it gives me recovery/rebuilding time and progress. I forgot how to execute it in real time. Also, I found out I could type /proc/mdstat on Firefox address bar and it will show my machine's file up on the tab. I can just refresh the page. Nice.

The resync begins automatically after I added the block device. This is all hot-plugging. I have not removed or added a physical device in actual terms.


Comments

Popular posts from this blog

ZFS Unable to System Snapshot, bpool is Full?

I first encountered the problem after a routine update / upgrade of the system. Well there was a kernel upgrade and I have not checked how many old kernels are still left for backups in /boot. Apparently, there was a few and the partition is 85% full. Every software update included a warning because of the restriction in disk space. Also, zfs could not create snapshots. It is also full. This is not very clear to me. Snapshots were suppose to be diff copies so why would it take up a large space. Most of the snapshots are less than 2MB. Or 0MB. Another problem that popped up is the constant freezing of Rhythmbox. I don't know if the config files are corrupted. The CPU cycles from one to the next. Peaks for 5-6 seconds then on to the next CPU. This forced me to download Clementine and Audacious. But both applications do not find the zfs pool or don't show the zfs structure. Why not? My final solution is to reinstall Rhythmbox via snaps. I re-scanned the music libr

Renter's ID and Business Licensing 2023

Last year's business permit application involved an undertaking of submitting lessee list to the Barangay in order to get them ID's including one for the lessor himself. I received a letter of notification just before New Year's Day. It informed me that I might be denied renewal of permits because I did not comply with this undertaking. So the Renter's ID is a serious thing now. When I went ahead and applied for a business permit renewal at the local government office everything went well except they want my list of lessee. So I had to backtrack and go to the Barangay and submit the list. They produced the ID's and I provided the photo ID's and of course have it signed by the lessee. After that, they pointed me to the cashier to pay the taxes and permit fees which totaled php15,305.00 ($280.33) During the payment of Fire and Safety department, they reminded me to bring my fire extinguisher official receipts of payment. I can pick up my new pe

How To Verify iso Image After Download In Linux

I assume that you have downloaded the image / iso file in a folder. Navigate to the folder where the iso is. You have to get the public gpg key for fedora downloads. [ donato@archdesktop Downloads]$ ls builds  debian-live--9.0.0-amd64-gnome  Fedora-Workstation-Live-x86_64-25  Fedora-Workstation-Live-x86_64-26 [ donato@archdesktop Downloads]$ cd Fedora-Workstation-Live-x86_64-26 [ donato@archdesktop Fedora-Workstation-Live-x86_64-26]$ ls Fedora-Workstation-26-1.5-x86_64-CHECKSUM  Fedora-Workstation-Live-x86_64-26-1.5.iso [ donato@archdesktop Fedora-Workstation-Live-x86_64-26]$ gpg --verify Fedora-Workstation-Live-x86_64-26-1.5.iso gpg: no valid OpenPGP data found. gpg: the signature could not be verified. Please remember that the signature file (.sig or .asc) should be the first file given on the command line. [ donato@archdesktop Fedora-Workstation-Live-x86_64-26]$ ls Fedora-Workstation-26-1.5-x86_64-CHECKSUM  Fedora-Workstation-Live-x86_64-26-1.5.iso