Please whitelist cPanel in your adblocker so that you’re able to see our version release promotions, thanks!

The Community Forums

Interact with an entire community of cPanel & WHM users!

RAID will always be synchronizing

Discussion in 'Workarounds and Optimization' started by pueblosnet, Aug 7, 2018.

  1. pueblosnet

    pueblosnet Active Member

    Joined:
    Dec 23, 2003
    Messages:
    38
    Likes Received:
    0
    Trophy Points:
    156
    Until now I used servers with a maximum of 2TB of hard disk and used RAID 1 for software without problems. It took about 1 day to synchronize. Now I am faced with the problem that with the 4TB disk it will take about 1 week and when it does, it will have to start again.
    I have increased the writing speed to the maximum in the files:

    /proc/sys/dev/raid/speed_limit_min
    /proc/sys/dev/raid/speed_limit_max

    And that has somewhat improved the timing, but not much. This is the result of:

    [[email protected] ~]# cat /proc/mdstat
    Personalities : [raid1]
    md2 : active raid1 sda3[0] sdb3[1]
    3872806720 blocks super 1.2 [2/2] [UU]
    [=======>.............] check = 38.3% (1486756992/3872806720) finish=34929.4min speed=1138K/sec
    bitmap: 20/29 pages [80KB], 65536KB chunk
    md1 : active raid1 sda2[0] sdb2[1]
    523712 blocks super 1.2 [2/2] [UU]
    resync=DELAYED
    md0 : active raid1 sda1[0] sdb1[1]
    33521664 blocks super 1.2 [2/2] [UU]
    resync=DELAYED
    unused devices: <none>

    That could be happening? I appreciate any suggestions or ideas on what else to look at, thanks.
     
    #1 pueblosnet, Aug 7, 2018
  2. sparek-3

    sparek-3 Well-Known Member

    Joined:
    Aug 10, 2002
    Messages:
    1,923
    Likes Received:
    177
    Trophy Points:
    343
    cPanel Access Level:
    Root Administrator
    Assuming since these are such large drives, that these are spinning SATA drives. Yea, it's going to take a while if you are using 4TB disks, that's one of the downsides of using such large disks. Spreading this out among multiple servers might be a better solution. Or perhaps 4 2TB drives in a RAID10.

    But 1138K/s is very slow.

    The raid check is going to depend on how much disk I/O is free to be used on the drives. So if you have something disk intensive (like a backup, cpanellogd forming statistics, or any other disk intensive tasks) it's going to slow down the process.

    You might consider switching the check out to monthly. I always thought weekly was overkill with this.
     
    #2 sparek-3, Aug 7, 2018
  3. cPanelLauren

    cPanelLauren Forums Analyst II Staff Member

    Joined:
    Nov 14, 2017
    Messages:
    6,476
    Likes Received:
    507
    Trophy Points:
    263
    Location:
    Houston
    cPanel Access Level:
    DataCenter Provider
    Hello @pueblosnet

    As indicated by @sparek-3 for that size disk it will take a considerable amount of time and the check depends on the amount of resources (I/O ) you have available to run the check. With the check running at 1138K/sec I would assume you've got some disk intensive tasks occurring. Other than the suggestions that have been made already (which I the optimal solutions personally) the only other thing is you may want to limit the amount of these tasks that are occurring on the server during the synchronization though this may be an unrealistic suggestion depending on how much attention you want to be devoting to this.
     
    Stop hovering to collapse... Click to collapse... Hover to expand... Click to expand...
    #3 cPanelLauren, Aug 9, 2018
(You must log in or sign up to post here.)
Loading...
Similar Threads - RAID always synchronizing
  1. leonep

    Raid check

    leonep, Dec 1, 2017, in forum: General Discussion
    Replies:
    1
    Views:
    562
    cPanelMichael
    Dec 4, 2017
  2. Denis Gomes Franco

    SOLVED [CPANEL-25598] AutoSSL not always working

    Denis Gomes Franco, Feb 21, 2019, in forum: Security
    Replies:
    28
    Views:
    1,855
    Denis Gomes Franco
    May 31, 2019
  3. kenneth-vkd

    Force cPanel to always perform MX Lookup

    kenneth-vkd, Nov 9, 2018, in forum: E-mail Discussion
    Replies:
    3
    Views:
    264
    cPanelLauren
    Nov 12, 2018
  4. mikefromnz

    Email sent to Office 365 users always marked as Junk?

    mikefromnz, Aug 23, 2018, in forum: E-mail Discussion
    Replies:
    1
    Views:
    417
    cPanelLauren
    Aug 24, 2018
  5. swbrains

    [CPANEL-21486] Feature Showcase instructions imply there's always an "Enable" button

    swbrains, Jun 29, 2018, in forum: General Discussion
    Replies:
    4
    Views:
    340
    swbrains
    Jun 29, 2018

Share This Page

  1. This site uses cookies to help personalise content, tailor your experience and to keep you logged in if you register.
    By continuing to use this site, you are consenting to our use of cookies.
    Accept Learn More...
    Dismiss Notice