dection 5Storage Devices.docx

So ill right click on disk one and click on convert

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basic disks to dynamic disks. So I'll right click on disk one and click on Convert to dynamic disk. Notice that I'm given the option to convert either just disk one or all of the other disks in the system, let's go ahead and use that option because we'll need to use them all. I'll click OK. Now notice that disks one, two, three, and four have been changed from basic disks to dynamic disks.
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Now that we have dynamic disks we can start defining RAID arrays. I'm going to right click on disk oneand notice in the popup menu I can create either a simple volume, a spanned volume, a striped volume, or a mirrored volume. These two are RAID implementations, striping and mirroring. Notice there's also an option to create a RAID five array. You can't actually do that on workstation versions of Windows you can only do it on server versions of Windows. We're using Windows 10, which is a workstation version of Windows so we don't have that option, it's grayed out. But we can create a mirrored volume which is equivalent to RAID one or we could create a striped volume which is equivalent to RAID zero. Now a spanned volume will span across multiple hard disk drives much like a RAID volume does but it's not really RAID because instead of implementing striping or mirroring or parody, a spanned volume simply just glues two disks together to create a volume and you don't have any redundancyand you don't have any performance improvement and hence it's really not a RAID volume.Sometimes we call this JBOD which stands for just a bunch of disks. So we're not concerned with spanned volumes. What we do want to create are striped and mirrored volumes. Let's begin by creating a mirrored volume. Creating a Mirrored Volume 3:01-5:22 I'll click on New mirrored volume. I'll click Next in the Welcome screen. Now a mirrored volume takes two hard disk drives and writes data to both of those disks at the same time whenever an operation occurs and the idea is that if one of those disks goes down a redundant copy of the data is available on the other disk. So we're protecting data when we implement mirroring. I right clicked on disk onewhen I selected New mirrored volume so it's added automatically to the selected column. To implement mirroring however I do have to add a second disk to the array. So I'm going to click on disk two and I'm going to click Add. So now we have disk one and disk twothat we used for the mirrored volume. Now you'll notice that each of these disks is about 32 gigs in size. However, the total size of the volume after we're done is only going to be 32 gigs. And sometimes this trips up folks who are new to RAID. They think, "Well I'm using two disks, "and each disk is 32 gigs. "Shouldn't the total size of the volume be 64 gigs?" Not with a mirrored array. With mirroring remember we're writing data redundantly to both disks at the same time. Hence, the total size of the volume is equal to just the size of one of the disks in the array.
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  • Spring '14
  • Serial ATA

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