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IBM system storage 3524 allocating new hard drive space

My hard drive space was getting too low on IBM system storage 3524 I put in some new hard drives.  I can see enough 'Un-allocated' space now.  
My vm's and data were already using Array 0 (RAID 5) on this storage.  Is there a way to allocate some of the new space to the existing array 0 or do I need to create new array 1 and allocate all space?
Help plz.
2 Solutions
Backup. Then check if your controller has the option to expand the array. if yes, you can use that option to expand it to your new disks. If there are issues, restore your backup. Or (in my point of view the better option) delete your array then create a new one with all the disks and aafter that restore yourr backup.
Philip ElderTechnical Architect - HA/Compute/StorageCommented:
Under array management you should find a "Migrate Array" option.

Using that option you can migrate the available storage into the existing array. Note, it may take _days_ to accomplish.

Also, I suggest migrating to RAID 6. It is much safer than RAID 5 in so many ways.

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