How to add 3 or how to add 2 more hdd in esisting raid 1

Since you already have a RAID1 array, i assume you want an additional array? Like your current RAID1 is drive C: and you want a second array that becomes D: ?

What's your question exactly, since i fail to see a problem definition.

Hi,

Thanks, for your reply.

Yes, I have a RAID1 array of SATA 160GB HDD x 2. Now i am short of space on C: drive, I want add one more array of SATA 500GB HDD x 2. Is it possible to add one more array without loosing the data or reinstallation of Win2k3 OS?
thanks,

Ravindra

Sure just add a second RAID-array and it'll be called D: and co-exist independently from the C: drive (which is your current RAID1).