You can create one storage space out of the pool or

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storage spaces. You can create one storage space out of the pool or you can create lots of storage spaceswithin the same pool. Let's begin by just creating one storage space in the pool. We'll use the default name of Storage Space. We'll assign it the next available drive letter in the system, which is E. We'll use the NTFS file system. Down here, we have to specify what type of resiliency we want to use. In many ways, storage spaces function like a RAID array does. If I click the drop down list here, you can see that one option is just to use no resiliency at all, which is simple. And this is kind of a dangerous option because if one of the disks fails, it is possible to lose chunks of your data. A better option would be to use a two-way mirror. When you select an option from the Resiliency Type, it tells you what that Resiliency Type does and how many drives you need. If we select two-way mirroring from the Resiliency Type drop down list, it tells us down here that the storage space will write two copies of your data to protect you from a single drive failure and that in order to use this option, you need to have at least two drives implemented in the system. Which is kind of the same as implementing Raid 1. You can also use three-way mirroring, which is very similar to two-way mirroring except that the storage space will write three copies of your data. In this case, it will protect us from two simultaneous drive failures. So we could have two drives in the storage space go down and still have access to the data. But notice that in order to do this, we have to have at least five drives in the system. Another option, the one that I like, is parity. Parity is basically the equivalent of using Raid 5.Now as it points out here, when you use parody, we're protected from a single drive failure using the parity information that is stored across the drives in the storage space. And just as with Raid 5, a parity storage space requires at least three drives. Let's use that option first. Now down here it tells us the size of the pool, the total pool capacity is about 93 gigs, the available pool capacity is 93 gigs, but notice down here the maximum size is only 61 gigs. Why is that? That's because 1/3 of each of the three hard drives in this pool is going to be used for parity information.And we can't store data in it. Therefore, the actual available size for storing data is about 2/3 the size of the entire pool capacity. The other third being used for parity. Let's go ahead and create the storage space. OK, so we have our storage space now created and notice that the storage space thatwe created is mapped to Drive E. If I go to this PC, we have a storage space Drive E and now we can save data within this storage space.I'm going to create a new bitmap image and let's edit it with Microsoft Paint and we'll add some gloriously beautiful artwork and save it. And close the file. Now because we're using parity for
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  • Spring '14
  • Serial ATA

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