Can you link external USB hard drives in a RAID-style system?
I have a load of old external USB hard drives lying around - as I'm sure an increasing number of others do also.
Is there any way I can utilize these to act in some kind of RAID-type system?
Seems a waste to have all that storage lying around in uneven and relatively small chunks.
I'm using Windows Vista Ultimate 64 bit.
Been hunting around the net after the tip from KovBal about dynamic disks - and came across this thread.
Basically, RAID using external USB hard drives doesn't look too achievable.
One quote here.
Using USB as the transfer technology you're only going to achieve a 30-Megabyte or less transfer rate. You seem to be going to a lot of effort for a marginal result. For external use, eSATA is a much better choice for performance.
Maybe I don't understand the intent, but having 3 USB external drives working as a single "Dynamic" volume is almost certainly going to saturate the Hubs/Controller they are on.
And another quote here.
The overhead of software RAID will probably cause problems on USB drives. Even if you get it working I think it will probably be flaky and error prone. You can buy USB enclosures that you can install multiple drives in. These enclosures use an embedded Linux so that you can then setup a RAID array. This way the RAID calculations and read/writes are all done outside of Windows. The interface can be USB, SCSI, eSATA, LAN, whatever, it makes no difference. Software RAID is a compromise at best. I don't believe RAID 5 is supported in Vista in any case. I would look for a different way to achieve your goal.
This might be done with dynamic disks. I'm not sure if an USB hard drive can be converted to a dynamic disk, but this seems to be the only way to this. Once you converted your HDDs to dynamic disks you can create all kinds of RAID volumes. If your HDDs' sizes aren't equal, you can still use JBOD, so you can have them all in the same file system.
However, only Vista Enterprise and Ultimate supports dynamic disks.