DS4700报错Degraded Logical Drive

Storage Subsystem: 30
Array: 1
RAID level: 1
Enclosure: Controller/Drive enclosure
Affected drive slot(s): 6
Service action (removal) allowed: Yes
Service action LED on component: Yes
Logical Drives: 1
Status: Degraded

Degraded Logical DriveWhat Caused the Problem?

One or more drives have failed in an array and the logical drives associated with this array have become degraded

. The data on the logical drives is still accessible. However, data may be lost if another drive in the same array fails. The Recovery Guru Details area provides specific information you will need as you follow the recovery steps.

  Caution: Possible loss of data accessibility. Do not remove a component when either (1) the Service action (removal) allowed (SAA) field in the Details Area of this recovery procedure is NO (

), or (2) the SAA LED on the affected component is OFF (note that some products do not have SAA LEDs). Removing a component while its SAA LED is OFF may result in temporary loss of access to your data. Refer to the following Important Notes for more detail.

  Caution: Electrostatic discharge can damage sensitive components. Always use proper antistatic protection when handling components. Touching components without using a proper ground may damage the equipment.

Important NotesUsually, a single drive failure in a RAID level 1, 3, or 5 logical drive will cause a degraded logical drive status. However, a degraded RAID 1 logical drive may have more than one failed drive if the failed drives belong to different mirrored pairs.When you replace a failed drive, data from the failed drive is reconstructed on the new drive. This reconstruction should begin automatically after you insert the new drive.Make sure the replacement drives have a capacity equal to or greater than the failed drives you will remove.You can replace failed drives while the affected logical drives are receiving I/O.Service Action Allowed Important Information:The Service action (removal) allowed field in the Details Area indicates whether or not you can safely remove the component. If the SAA field is NO (

), then the affected component must remain in place until you service another component first.The Service action LED on Component field in the Details Area indicates whether or not a physical SAA LED is present on the hardware component. This field does NOT indicate whether the LED is ON or OFF (that indication is provided by the Service action (removal) allowed field).If a component does not have an SAA LED, then it is OK to remove the component when its fault LED is lit and the Service action (removal) allowed field = YES (

) in the Details Area.The Service action (removal) allowed field shown in the Details Area and the physical SAA LED on the hardware component (if supported) MUST match before you remove the affected component. In rare cases (such as multiple problems), the status of the LED and the SAA field may not match. If there is a mismatch, then you should NOT remove the component until these indications match. The Recovery Steps will help you to make this determination.Recovery Steps

1	Check the Details area to identify the failed drive(s).
2	Remove all failed drives associated with this array (the fault indicator lights on the failed drives should be on). To make a visual association of the failed drive(s), select one of the degraded logical drives in the Logical View of the Subsystem Management Window, that is listed in the Recovery Guru Details area. Each drive associated with the logical drive will have an association dot underneath it. The failed drive is marked .
3	Wait 30 seconds, then insert the new drive(s). The fault indicator light on the new drive(s) may become lit for a short time (one minute or less). Result: Data reconstruction should begin on the new drive(s). Their fault indicator lights will go off and the activity indicator lights of the drives in the array will start flashing. When the reconstruction starts, the array's logical drive icons in the Logical View of the Subsystem Management Window change to Operation in Progress , then to Optimal , as the logical drives are reconstructed. Notes:If you are replacing a drive in a storage subsystem that contains hot spares, drive reconstruction will start on the hot spare before you insert the new drive. The data on the replacement drive may not be reconstructed until after it has completed the process on the hot spare.If reconstruction does not start within a few minutes, select the new drive; then, select Advanced >> Recovery >> Reconstruct Drive to start reconstruction on the drive.To monitor reconstruction progress on the affected logical drives or to change the reconstruction rate, select the reconstructing logical drive; then, select Logical Drive >> Properties. Note that once the operation in progress has completed, the progress bar is no longer displayed in the properties dialog.Wait until the reconstruction is completed for all logical drives before continuing.
4	Select Recheck to rerun the Recovery Guru. The failure should no longer appear in the Summary area. If the failure appears again, contact your technical support representative.