kriston's Journal: Redux: Optimize performance of EC2 EBS volumes and Amazon WorkSpaces

This is an update to my previous Journal article "Optimize performance of EC2 EBS volumes and Amazon WorkSpaces." Along with writing each unused sector, Amazon also recommends reading from each sector. To do this we can use the Windows version of the "dd" command available at http://www.chrysocome.net/dd.

1) Find the name of your drive:
        wmic diskdrive get deviceid

2) Choose one. It will look something like \\.\PHYSICALDRIVE0.

3) Type this command carefully:
        dd if=\\.\PHYSICALDRIVE0 of=/dev/null bs=1M --progress --size

4) When completed, repeat step 3 on \\.\PHYSICALDRIVE1 and any other volume you have on your instance. For example, Amazon WorkSpaces will have a \\.\PHYSICALDRIVE0 for drive C: and \\.\PHYSICALDRIVE1 for drive D:.

These instructions are from this article: http://docs.aws.amazon.com/AWSEC2/latest/UserGuide/ebs-prewarm.html.