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I had a failing motherboard. The two drives were originally set to RAID 1 (Via Promise) but had degraded some years ago...the RAID array was removed...and the drives continued to function as separate entities. One boot the other merely storage. &nbsp;I cloned the boot drive and installed a new (different) motherboard. If I attempt to do a repair install of Windows XP, windows does not see the old OS. I wanted to do a repair of Win XP Pro&gt;Vista Business upgrade&gt;Win 7 Pro upgrade...the reason being that there are many programs installed that I don't want to have to reinstall all. If I try to boot to the hard drive , I get &quot;NTLDR is missing&quot;.<br />
I have tried fixboot, fixmbr but no joy.<br />
Any suggestions? Thanks
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I had a failing motherboard. The two drives were originally set to RAID 1 (Via Promise) but had degraded some years ago...the RAID array was removed...and the drives continued to function as separate entities. One boot the other merely storage.  I cloned the boot drive and installed a new (different) motherboard. If I attempt to do a repair install of Windows XP, windows does not see the old OS. I wanted to do a repair of Win XP Pro>Vista Business upgrade>Win 7 Pro upgrade...the reason being that there are many programs installed that I don't want to have to reinstall all. If I try to boot to the hard drive , I get "NTLDR is missing".
I have tried fixboot, fixmbr but no joy.
Any suggestions? Thanks

former raid drive will not boot in a new hardware environment

Storage devices include any device used for storing and retrieving digital information. Hard disk drives (HDDs) use one or more rigid ("hard") rapidly rotating disks (platters) coated with magnetic material. Data is accessed in a random-access manner, meaning that individual blocks of data can be stored or retrieved in any order and not only sequentially. The primary competing technology for secondary storage is flash memory in the form of solid-state drives (SSDs), but HDDs remain the dominant medium for secondary storage due to advantages in price per bit and per-device recording capacity. CD-RW (Compact Disc-ReWritable) is a digital optical disc storage format that allows information to be stored outside the mechanical HDD.

Storage Hardware

The Microsoft Legacy Operating System topic includes legacy versions of Microsoft operating systems prior to Windows 2000: All versions of MS-DOS and other versions developed for specific manufacturers and Windows 3/3.1, Windows 95 and Windows 98, plus any other Windows-related versions, and Windows Mobile.

Microsoft Legacy OS

RAID stands for Redundant Array of Independent Disks.

RAID is data storage technology that allows multiple drives to be used together as a single virtual drive for reasons such as fault tolerance, reliability and performance. 

There are several different levels of RAID that determine how the data is stored and the level of redundancy achieved across the drives.