The only thing you have to worry about when purchasing a oem hard drive is that it meets Mitel Specs. One of those specs are that it be a 256 or 512 meg hard drive, 1 gig and 2 gig hard drives have never been approved for the sx200icp as they have never been tested with 1 gig and 2 gig hard drive. Maybe someday they will soon as the supply of 256 and 512 hard drives are getting harder to find. Hopefully Mitel someday will understand this and approve those hard drives, 1 gig and 2 gig hard drives will work but will not be supported by Mitel. When you run the Initial installation software on the sx200icp it will format the hard drive for you.
