RAID management module provides a simple graphical way to manage the CFA RAID arrays that are present on the system. RAID system does not require any user intervention under normal operating conditions. In the event of a hard drive failure, use this interface to replace the failed drive and repair the RAID array.
The bay configuration section shows the logical setup and status of the bays as a table. The table lists the bays, their format, storage capacity, and the status.
The Alarms section shows a list of recently logged messages regarding the status of the individual RAID arrays. For a complete list of the events and their explanations, see Array notification events.
If an array and its constituent drives are operational, the background color of the drive bays is green.
If any of the RAID arrays have problems, the background color of the drives is red, and a red banner is displayed on the View Notices screen. In addition, the RAID icon in the lower right will be red. Any notice will cause the banner behind the View Notices button to turn red:
Identifying a failed disk drive
When the system detects a failed disk drive in one of the redundant arrays, the failed disk drive will be marked with . Once a disk and its associated array have been marked, the first step is to attempt a rebuild. If the rebuild fails, it is likely the failed drive needs to be replaced to restore array integrity. Contact Infrascale Support to confirm, if necessary. Once the new drive has been installed, the associated array must be rebuilt.
Restoring array operation
Once you have identified a failed disk drive, complete the steps in the following sections to replace the drive and restore the array to full operation.
Logically remove the degraded disk
While RAID drives are hot-swappable, to logically remove the disk drive, click the button associated with the drive bay of the failed disk, and then click Offline. (Archive drives must always be prepared for removal.)
When prompted to confirm the Offline action:
Click Yes to remove the selected disk (taking it offline), or
Click No to cancel the operation.
Once the disk is logically removed, you can no longer select the bay without first using the Rescan button.
Physically remove the bad drive and replace it with a good drive of equal (or greater) capacity. A tested and supported replacement disk can be obtained from your Infrascale dealer or reseller.
To remove the disk, slide the button on the drive bay to the right, which releases a small lever. Pull back on the level until the disk and the mounting sled are released from the CFA.
Insert the new disk and sled into the drive bay until the disk is almost entirely inserted. You should feel a small amount of resistance. Then press the lever to finish inserting and locking the sled into place.
Once you have installed and scanned the new disk, you can initiate rebuilding the degraded array. Select the button of the replacement disk, along with the button(s) of any other disk(s) in the degraded array, and then click Rebuild.
The system will begin to rebuild the unit, and the background of the array disks will become yellow. The rebuilding status is displayed with and the status changes to Rebuilding tracking % of completion. When is covered with green slices, the rebuilding process is complete, and the background colors are reset to green.
You can scan the RAID for new drives by clicking Rescan. The system will recognize any new drives, including the one just replaced. If the new drive appears to have data stored on it, you will need to format the drive before it can be used for rebuilding the array.
Format new drive
This step may be necessary only if the new drive appeared to have been used before to store non-redundant data. If reformatting is necessary, the system will enable the Reformat button and prevent you from rebuilding the array with this drive until the disk has been reformatted. Reformatting will cause some basic information on the disk to be erased and any previously stored data to be lost. Reformatting should only take a few seconds. Once the drive is reformatted, it can be used for rebuilding a degraded array.
Command button actions
The actions of the command buttons in the displays are summarized in the following table:
|Refresh||Refresh the drive information|
|Rescan||Scan disks for physical changes and update the display presentation|
|Clear Alarms||Clear all alarms|
|Rebuild||Rebuild the array using the selected disk|
|Offline||Take the disks in the selected bays offline, prepare them for physical removal|
|Reformat||Make a disk in the RAID bay or in the archive bay usable for that bay’s function by erasing data on that disk. |
This is a high-risk operation. Be careful not to reformat a disk that you used to save data unless you no longer need the data
|Verify||Initiate the array verification|
|Stop Verify||Stop the array verification|
Array notification events
The following table explains the most common messages than can appear in the Alarms box on the RAID status page. These messages will be preceded by the time the event occurred, the bays of the disks involved, and the severity of the message.
|Drive error||An error was encountered with the disk in the specified bay|
|Incomplete unit detected||Incomplete unit detected disks to bring it online|
|Rebuild failed||An attempt to rebuild an array has failed|
|Array degraded||The system has stopped using a disk in the specified array and has started using the redundant information to retrieve data|
|Verify failed||An attempt to verify the redundant information in an array has failed; the disk drive that contained erroneous data is given|
|Initialization finished||The system has finished creating the redundant information on a new array or on an array that was not cleanly shut down|
|Initialization started||The system has started creating the redundant information on a new array or on an array that was not cleanly shut down|
|Rebuild finished||The system has finished rebuilding a replaced disk with information from the other disks in the specified array|
|Rebuild started||The system has started rebuilding a replaced disk with information from the other disks in the specified array|
|Verify complete||A verification process has finished on the specified array|
|Verify started||A verification process has been started on the specified array|
|Soft reset occurred||The disk has been reset without powering down|
|Array degraded||The specified array has been degraded and should be replaced|
|Controller error||The disk controller of the specified disk has issued an error|
|Logical array deleted||The specified logical array has been deleted|
|Sector repair occurred||Sector repair occurred A sector on the specified disk had reported an error and has been repaired|
|Encountered bad sector during rebuild||During a disk rebuild a bad sector was found|
|Replacement drive is too small||The drive used as a replacement is smaller than the one it is intended to replace|
|Verify error||An error has been found during verification of the specified disk|
|Drive not supported||The specified drive is not supported by the CFA|
|Unclean shutdown detected||If the CFA is not properly shut down, the system does not have time to stop the RAID controllers. This may cause the system to reinitialize the RAID array(s). This initialization process can cause performance degradation while the initialization is in progress. Loss of data may also occur. Turning the power off, pressing the Reset button, or losing power to the box are common ways to cause an unclean shutdown|
The following table describes the messages displayed in the bay configuration and status section.
|Degraded||When the label is applied to an array, the array is compensating for a failed or missing disk by recalculating data from the remaining disks. |
When the label is applied to a disk, the system has detected a fault with the disk and is no longer using the disk to retrieve information
|Initializing||The system is calculating the redundant data used to recover information in the event of a disk failure or loss|
|Rebuilding||The system is recalculating the information of one or more disk drives in an array, usually as a result of a disk drive replacement process|
|Unused||There is no disk in the drive bay|
|Verifying||The system is recalculating the redundant data and comparing it to the data on disk to ensure the integrity of the entire array|