Linux RAID Recovery

By | August 25, 2020

Linux RAID Recovery : RAID, the acronym of Redundant Array of Inexpensive Disks is a platform where you’re able to store all of your data virtually, which also provides you with a way out to store data on different places, i.e., on multiple physical hard disks.


The idea behind RAID is the increasing performance of your system or providing fault tolerance.

However, the RAID comes with its own set of disadvantages. The failures in the RAID are of two types, i.e., breakdowns which decrease the resilience and failures which prevent the RAID device from operating.

To recover the Linux Software RAID, here are a few attributes which you apply to rebuild –

Fill the brand-new CD with the appropriate information from the present array

  • Under the impression, data must be revised, and the data from the current
    array, which is right.
  • Is presented when a disk has been reinstated

If a RAID is performed with a spare disk, this will come in for the disk
positioned to faulty. A rebuild will be done automatically.
To put it back to the array as a spare disk, it must be excluded first and then
added again.

As important as the rebuild is, the resync has the following properties –

Make sure that all the data in an array is in sync with respect to consistency

  • Assumption – data should be in order
  • If there’s an issue while reading the device, then it is inferred that data
    will be written from another device to all others.

Apart from this, most users try to boot their device, however, when it fails to
boot the user can switch to the other alternatives –

Use “link rescue” from a disk –

It includes a rescue mode which can be started by typing ‘Linux rescue’ at the
‘boot:’ prompt, which will further put you through configuration screens.

  • Speed up the RAID resynching process : Resynching the date would take hours, and you can reduce it to 90 minutes by typing ‘MD’ to speed up the process.
  • Reinitialize Grub (the boot ladder) – Once you’ve mounted the disk with the root file system, you will find the grub
    command-line configuration tool in /sbin/grub.
  • Convert an ext2 file system to ext3 – It is possible that you make an error and run “fsck” on your ext3 disk, which can
    ultimately cause it to convert to an ext2 disk.

The net result was that it refused to mount it and thus, you’ll have to convert ext2 to an ext3 disk.

These are some of the solutions which you can use to recover RAID.

What’s left on your part is to choose what is the best solution for you and get a solution to this problem as soon as possible since we know that these kind of issues can be annoying.

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