Readonly Filesystem

I am using Supermicro server having Hardware RAID LSI 9271-4i. It has 3 SAS and 1 SSD drives

Initially I had created a RAID 1 with 2 SAS drives. Installed CentOS and everything worked as expected.

Then I created a RAID0 using only 3rd SAS drive as CentOS was showing only sda which was RAID of first two SAS drives and not showing 3rd SAS drive.

Now CentOS starts but makes the filesystem readonly and hence gives several error messages on the boot.

May I know how to make my filesystem read-write again?
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sysautomationAuthor Commented:
I have already run fsck on both the drives by booting up with rescue disk.

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