How to use Ready Boost, and what are the requirements for using portable hard drives and flash drives to use with Ready Boost?

I have Windows 7 64bit Ultimate Edition and am trying to get Ready Boost to work on my PC by using Portable hard drives or flash drives. I have 2 portable hard drives(iomega 120gig, Seagate 250gig) and a cruzer sandisk 8gig flash drive. All these divices when trying to use ready boost says that these disks are not compatible or not supported. So what do I need?
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Answer
Answer
Not all drives will work with ReadyBoost. You'll find a few drives that actually will state they are ReadyBoost capable.

Per WikiPedia:
  • The device must have an access time of 1 ms or less.
  • The device must be capable of 2.5 MB/s read speeds for 4 KB random reads spread uniformly across the entire device, and 1.75 MB/s write speeds for 512 KB random writes spread uniformly across the device.
You must also dedicate the unit and leave it plugged in for ReadyBoost; so ReadyBoost is better suited for a small thumbdrive (up to 4 gig) than a larger thumbdrive or external HD that you'd likely be unplugging from time to time.

Open Window's Explorer, locate your Cruzer - Right Click on it and click on Properties. If there's a ReadyBoost tab, you can set it up - set it for Dedicate this device for ReadyBoost. It will set it up and write a file to the thumb drive. Click Apply and you're good to go.

ONE CAUTION which I can attest to first hand. Apparently when booting, Win 7 has trouble with a few thumbdrives - it will search the thumbdrive for the Operating System, stall the boot process and tell you: "Missing Operating System" --luckily the solution is very easy. Shut down the computer, pull out the thumb drive, restart the computer and it will boot as normal. I had that happen with an 8 gig Cruzer. This seems to be a random thing, as I had the Cruzer plugged and booted many times without encountering the Missing Operation System error message. No idea why or why it's sporatic. Currently, I'm using a 2 gig Kodak thumbdrive which seems to be working fine.

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Last updated April 26, 2020 Views 1,970 Applies to: