Книга: Windows Server 2012 R2 Storage, Security, & Networking Pocket Consultant
Understanding volume sets
Understanding volume sets
With volume sets, you can create volumes that span several drives by using free space on different drives to create what users perceive as a single volume. Files are stored on the volume set segment by segment, with the first segment of free space being used to store files before other segments. When the first segment fills up, the second segment is used, and so on.
You can create a volume set using free space on up to 32 hard disk drives. The key advantage to volume sets is that they let you tap into unused free space and create a usable file system. The key disadvantage is that if any hard disk drive in the volume set fails, the volume set can no longer be used, which means that essentially all the data on the volume set is lost.
Understanding the volume status is useful when you install new volumes or are trying to troubleshoot problems. Disk Management shows the drive status in Graphical View and Volume List view. Table 2–1 summarizes status values for dynamic volumes.
TABLE 2–1 Understanding and resolving volume status issues
| STATUS | DESCRIPTION | RESOLUTION |
|---|---|---|
| Data Incomplete | Spanned volumes on a foreign disk are incomplete. You must have forgotten to add the other disks from the spanned volume set. | Add the disks that contain the rest of the spanned volumes, and then import all the disks at one time. |
| Data Not Redundant | Fault-tolerant volumes on a foreign disk are incomplete. You must have forgotten to add the other disks from a mirror or RAID-5 set. | Add the remaining disks, and then import all the disks at one time. |
| Failed | An error disk status. The disk is inaccessible or damaged. | Ensure that the related dynamic disk is online. As necessary, press and hold or right-click the volume, and then tap or click Reactivate Volume. For a basic disk, you might need to check the disk for a faulty connection. |
| Failed Redundancy | An error disk status. One of the disks in a mirror or RAID-5 set is offline. | Ensure that the related dynamic disk is online. If necessary, reactivate the volume. Next, you might need to replace a failed mirror or repair a failed RAID-5 volume. |
| Formatting | A temporary status that indicates the volume is being formatted. | The progress of the formatting is indicated as the percent complete unless you choose the Perform A Quick Format option. |
| Healthy | The normal volume status. | The volume doesn’t have any known problems. You don’t need to take any corrective action. |
| Healthy (At Risk) | Windows had problems reading from or writing to the physical disk on which the dynamic volume is located. This status appears when Windows encounters errors. | Press and hold or right-click the volume, and then tap or click Reactivate Volume. If the disk continues to have this status or has this status periodically, the disk might be failing, and you should back up all data on the disk. |
| Healthy (Unknown Partition) | Windows does not recognize the partition. This can occur because the partition is from a different operating system or is a manufacturer-created partition used to store system files. | No corrective action is necessary. |
| Initializing | A temporary status that indicates the disk is being initialized. | The drive status should change after a few seconds. |
| Regenerating | A temporary status that indicates that data and parity for a RAID-5 volume are being regenerated. | Progress is indicated as the percent complete. The volume should return to Healthy status. |
| Resynching | A temporary status that indicates that a mirror set is being resynchronized. | Progress is indicated as the percent complete. The volume should return to Healthy status. |
| Stale Data | Data on foreign disks that are fault tolerant are out of sync. | Rescan the disks or restart the computer, and then check the status. A new status should be displayed, such as Failed Redundancy. |
| Unknown | The volume cannot be accessed. It might have a corrupted boot sector. | The volume might have a boot sector virus. Check it with an up-todate antivirus program. Rescan the disks or restart the computer, and then check the status. |
Оглавление книги
- Adjusting Volume
- Understanding volume basics
- Deleting volumes and volume sets
- Managing volumes
- Chapter 8. Saving and restoring large rule-sets
- На всех дисках моего компьютера есть папка System Volume Information. Для чего она нужна?
- Understanding the Command Line
- Understanding Set User ID and Set Group ID Permissions
- Understanding init Scripts and the Final Stage of Initialization
- Understanding Point-to-Point Protocol over Ethernet
- Understanding SQL Basics
- Understanding the Changes Made by DHCP