Qs:
- Are you trying to recover the data, or just to use the disks?
- Were the disks configured in a RAID array, JBOD, or a mix of both?
- What MB? Specifically, what southbridge chip, if you know it? Or if your disks were connected to a peripheral card controller (e.g. PCI, PCIe or PCI-X), then what model controller card was it?
- Where was your O/S installed?
- How large are the disks? How old?
Data Recovery
JBOD: You should be able to purchase an affordable external disk enclosure for a single 3.5" disk that you can plug into your laptop w/ e.g. USB or Firewire (1394). You can purchase these online or at e.g. Best Buy. Just make sure to get a 3.5", not a 2.5" enclosure.
RAID 0 or 5: If your disks are in a driver-controlled (as opposed to Windows-controlled) RAID array (e.g. RAID 5 or RAID 0), then your laptop won't be able to pull the data out in a usable way. Your best bet is to get a new MB with the same or similar southbridge, and try to get Windows to run with the new MB. Sometimes this works straight away, and sometimes it requires a "Repair Windows". See the THG article about RAID Migration for more info. But before you head down this path, you should be very sure that your current RAID controller is in fact dead
Continued Use
As noted above, you could use a USB-based external controller to get to your disks. But this won't deliver very good performance compared to a well-implemented RAID 0 or RAID 5 array. If you had a 4-disk RAID array to begin with, chances are you want that performance again. Your laptop won't be able to do much with it, however, since you can't easily connect a laptop to an external RAID array except through 1394, USB or Ethernet. Gb Ethernet will give you the highest throughput (1 Gbps), followed by 1394b (800 Mbps), USB 2.0 (480 Mbps), 1394a (400 Mbps), Fast Ethernet (100 Mbps) and USB 1.1 (12 Mbps?). None of these approach the performance of a RAID card on a PCIeX4 connection which can achieve up to 1 GBps, or about 8 times as fast as gigabit ethernet. Of course, 4 good drives won't be able to achieve more than ~ 400 MBps unless they're hitting cache.
It would help if you said more about what you are trying to do.
[edit]Quick note about HD performance limited by disks[/edit]