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.

info This section does not apply to the CFA Model 1200 or vCFAs.

Getting started

info These settings are also available via the RAID icon in the lower right of the Management Console.

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.

info If the disk drive was removed or taken offline accidentally, you only need to rebuild the degraded array. (See Rebuild the array.)

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.

Replace disk

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.

info Do not remove two or more array disks at one time, or else data loss will occur and you will need to restore the data from an archive.

Rebuild array

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.

info The rebuild process can take up to two hours per 1 TB. During this time, the system is fully operational but may exhibit reduced performance. The busier the CFA is with other processes while the RAID is rebuilding, the slower the array will rebuild. To maximize rebuild speed, contact Support to stop services. While these services are stopped, backup jobs will not run. This is recommended for very large arrays.

Rescan array

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:

Button Description
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.

info Here, port is equivalent to a physical disk, and unit is equivalent to an array.
Message Description
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

Status values

The following table describes the messages displayed in the bay configuration and status section.

Message Description
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