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I am wondering if the following is possible with any RAID card currently in existence. (Not interested in software RAID):

I start with a RAID 10 of 500 gig disks. (unit size is 1 TB) I want to swap in 1 TB disks, one by one, and migrate the size of the unit from 1 TB to 2 TB on the fly. Is this possible? If so, what controller(s)?

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up vote 4 down vote accepted

Yes, this is possible with quality hardware RAID controllers.

  • HP Smart Array controllers absolutely support this.
  • Dell PERC controllers do this.
  • LSI RAID controllers can support this.
  • Adaptec RAID controllers...


Of course, you need operating system support to recognize the newly-expanded array... So in most cases, a reboot can be required.

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