![]() Each disk is asked to send back just the part of the file which it holds. When reading or writing a large file, the request gets sent to all of the disks at the same time. Each disk contains only part of the volume. Stripe volumes, also known as RAID 0 volumes, spread the data for a volume over 2 or more disks. For that reason, and because a stripe volume isn’t protected against disk failure, RAID 0 is NOT a viable alternative for permanent storage Over time, that risk increases-our calculations show on average a 25% risk of a disk failure within 10 years with a four disk RAID2. When considering using RAID 0, it’s important to remember that all disks can fail, even one that is considered ‘reliable’. Stripe volumes are great for scratch files or when you have readily available backups of the files on your volume. When a disk fails on a stripe volume, you will lose all the files on the volume. However, they provide no protection from disk failure. ( Figure 2) lets you reactivate the disk in this case (e.g., to back up the data).SoftRAID stripe volumes give you the highest possible performance. However, if a physical disk in a spanned volume fails, Windows disables it in Explorer if access is no longer technically possible. If you just temporarily disconnect a physical hard drive from the system and then reconnect it, you do not need to repair the volume rather, you "reactivate" it from the disk's context menu. You do not have to initialize the data carrier, but you can switch it to the online state. If a physical hard drive of a RAID5 volume is defective, you need to replace the disk, restart Windows, and select Repair Volumeįrom the context menu. If you select this menu item, Windows automatically suggests the physical drive that will be used to recover the spanned volume. Option appears, assuming that Windows finds an empty volume that can be used to repair the extended volume. If an extended volume fails because a physical hard drive can no longer be accessed, the Repair Volume In this case, the context menu for the disk displays more settings options at the bottom. Windows points out in the Disk Management system utility that some follow-up work is needed for spanned volumes. ![]() If you create a volume that spans multiple drives, you can repair it from the context menu should the need arise (e.g., if one of the disks fails or you replace a disk). If you right-click directly on the data carrier in the left pane instead of on the free space to the right, you will also see the options for a New Spanned Volumeįigure 1: You can create new volumes, including software RAID, in the Disk Management system utility. Option in the context menu of the free space you will be using. ![]() The drives, simply referred to as "Disk 0," "Disk 1," and so on, in Windows Server, can be created with the New Simple Volume Once the disks are established, you can set them up with logical drives. If you are configuring a specific storage system, such as software RAID or a storage pool, and you need to convert a hard drive, you are automatically prompted. Setting Up DisksĪfter initializing, you can view and set up the volumes in Disk Manager. Creating and managing software RAID will be similar to using NTFS, with the benefit of the higher stability of ReFS. For software RAID in Windows Server 2019, you can also use the resilient filesystem (ReFS). For the configuration, use the Disk Management tool, which you launch by calling diskmgmt.msc. If you are creating a disk that spans more than one physical drive, you need to select the disks that you want to include when defining the drive type. In addition to storage pools, legacy disks, spanned volumes, and striped volumes, Windows Server allows you to create a software-based RAID5 system, as well as a mirrored volume that requires two hard drives to which all information is written and from which you can boot. Hardware solutions are generally recommended for RAID (redundant array of independent disks) systems, but sometimes admins might find software RAID on their servers useful. Additionally, it does not support hot swap – that is, the ability to replace hard drives on the fly. However, RAID as a software solution does not make sense in some cases because the performance is less than optimal and parity information is not calculated by a dedicated processor. Windows, Linux, and macOS offer a wide range of alternatives for creating software RAID data storage.
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