There are a few things to keep in mind before setting up RAID on an existing system. JBOD is used to simply increase the capacity of a volume when one drive in a JBOD array is filled, data spills over to the next drive, and so on. There is no performance improvement nor data protection though. JBOD gives users the ability to link multiple drives together to create a single, larger-capacity volume. Technically, JBOD is not RAID, since it doesn’t offer any sort of redundancy, but it is a mode supported by most drive controllers. Three 1TB drives used in RAID 5, for example, will offer a total capacity of 2TB. Also note that the total capacity of a RAID 5 setup will be the sum of all of the capacities of the drives used in the array, minus the capacity of one. Depending on the capacity of the drives used, rebuilding a RAID 5 array can take some time, so it’s usually recommended for smaller volumes. In a RAID 5 setup, a single drive in the array can fail without any loss of data, but performance will be degraded until the bad drive is replaced and the array rebuilt. RAID 5, which requires a minimum of three drives, improves performance by striping data like RAID 0, but it also offers a level of redundancy in RAID 1-like fashion by storing parity data across the drives in the array.
Raid setup on virtualmachine Pc#
As we’ve mentioned, RAID can increase storage performance or offer some level of redundancy-both things most PC users want. Today’s hard disks and solid state drives are far more reliable than their predecessors, which make them perfect candidates for RAID.
When to use RAIDīudget permitting, there are many good reasons to use RAID. Typically, the process requires little more than installing some drives, attaching them to a RAID or drive controller, and stepping through a simple wizard that’s either embedded in firmware or available within your operating system. Setting up a RAID array is easy in most cases. Expansion cards are available too, which can add RAID support to any system with an open PCI-E slot.
Raid setup on virtualmachine software#
Most operating systems-including Windows-also give users the ability to configure what’s known as software RAID. Now, though, all but the lowest-end desktop systems (and even some laptops) feature integrated drive controllers with RAID support built right in. RAID used to require expensive hardware purchases and was sometimes difficult to configure. RAID storage arrays make multiple drives work together in concert.
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