Rhel5 software raid

RAID 1 — This level has redundancy. If there are spare disks available, and if the system survived the crash, reconstruction of the mirror will immediately begin on one of the spare disks, after detection of the drive fault.

If two drives fail, all data is lost. If spare disks are available, reconstruction will begin immediately after the device failure. If two disks fail simultaneously, all data are lost. RAID-5 can survive one disk failure, but not two or more. Select Force to be a primary partition if you want the partition to be a primary partition. A primary partition is one of the first four partitions on the hard drive. If unselected, the partition is created as a logical partition.

If other operating systems are already on the system, unselecting this option should be considered. Repeat these steps to create as many partitions as needed for your RAID setup. Notice that all the partitions do not have to be RAID partitions.

So the rebuild process has started. The mdmonitor daemon can be used to monitor the status of the RAID. Then restart mdmonitor service using systemctl :. In case of hardware failures or emergency shutdowns, the software RAID array may become inactive. All drives are marked as inactive, but have no errors. In this article I have described the main things when working with the tool, and covered the typical questions that arise when working with RAIDs using mdadm.

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