I have gotten a case to change a failed hard drive in a HPE 3PAR StoreVirtual 7200 storage system.
The process is not as simple as hot-swapping the hard drive which is possible but there are checks that have to be perform before this task is done to maintain the integrity of the data on the storage.
Before I go into the details, let me share how the 3PAR work. It is important to note that this system is different in how it stores data on the disk.
The 3PAR stores data in small chucks called chunklet which is spread across multiple drives using parity.
When the system detects a possible failure, the servicemag start to migrate all the data chunklets to other drives to mitigate against lost of data.
This functionality takes me to the point that before you can replace a hard drive, it is important that you check the status of the servicemag to ensure the migration process is completed before removing the hard drive from the system. This crucial step will ensure data integrity and consistence across the drives.
To check if the migration of data hsa been completed, run the following command:
servicemag status
If the status indicate completed, then you are clear to replace the hard drive. Otherwise, you will have to wait for the process to complete which can be hours or days. The waiting period is dependent on the amount of data stored on the disk.
After the Hard Drive has been replaced, it does not stop there. You have to rerun the command below:
servicemag status
Reference website: d8tadude.com/3par
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