Problem:
Under Mac OS 10.4.7, the My Book RAID Manager utility hangs or fails to start when the WD My Book Premium II or Pro II is connected to the computer by USB.
Cause:
An accompanying file (WDDrvSvc) used by the My Book RAID Manager utility may have a link issue between the Operating System and the program attempting to run.
Resolution:
Reboot the computer and start the My Book RAID Manager utility again.
A RAID 1, or "mirror", is built from two disk drives, where one disk drive is a mirror of the other (ie, the same data is stored on each disk drive). Compared to independent disk drives, a mirrored volume provides faster performance, but has only 50% of the capacity.
The following provides the steps necessary to create RAID 1 volume. It is assumes the following:
- You have backed up any/all critical data off of the BlackArmor NAS Server.
- All previous unneeded Volumes have been deleted.
- You are currently logged into the BlackArmor Manager with admin privileges.
Procedure(s):
- Mouseover Storage and click Volumes. The Volumes…
A volume with RAID 10 is built from two or more equal-sized RAID 1 volumes. Data in a volume with RAID 10 is both striped and mirrored. Mirroring provides data protection, and striping improves performance.
The following provides the steps necessary to create RAID 10 Volume. It is assumes the following:
- You have backed up any/all critical data off of the BlackArmor NAS Server.
- All previous unneeded volumes have been deleted.
- You are currently logged into the BlackArmor Manager with admin privileges.
Procedure:
- Mouseover Storage and click Volumes. The Volumes page opens.
- Click the Add icon. The Volume Add Disk Selection page opens. Select the…
A volume with RAID 5 is built from a minimum of three disk drives and uses data striping and parity data to provide redundancy. (Parity is extra information that is used to re-create data if a disk drive fails. In volumes with RAID 5, parity data is striped evenly across the disk drives with the stored data.) Parity data provides data protection, and striping improves performance.
The following provides the steps necessary to create a RAID 0/1/5/10/Spanned/JBOD volume. It is assumes the following:
- You have backed up any/all critical data off of the BlackArmor NAS Server.
- All previous unneeded volumes have…
RAID 0 is also commonly referred to as "striping". RAID 0 is known for speed. When data is written to the RAID 0 volume, it is written to all drives striped together at the same time. Think of each interface as a water hose and the volume as the bucket; the bucket will fill faster if multiple water hoses are filling it at the same time. The same holds true for striping – data writes faster to the volume because it is being written through more than one drive interface.
The downside to RAID 0 volumes is the fact that…
What do I need to consider when selecting drives for use in a RAID configuration? Can two different hard drives be used in a mirroring or RAID array, or must they be identical brands and models?
Hard drives for RAID. Mix hard drives in a RAID array?
Most SCSI RAID controllers will accept different kinds of hard drives. The hard drives should match in capacity points and rotational (RPM) speed. At best, all drives in an array will be identical–at the same firmware revision level.
RAID can be used with any size hard drive. The smallest capacity drive will determine the largest logical volume…
When you connect a WD external drive to your Mac computer, and you have the WD Drive Manager installed on it, a little blue WD icon appears in the upper right corner of your desktop. Depending on the status of your drive, or dual RAID drive, the WD icon will do different things.
- The WD icon is also the way that you access the drive’s status, or as in this case, the drive’s RAID status. When the RAID is healthy, you will see the blue WD icon. Clicking on the WD icon opens a short menu that leads to launching the RAID Manager. From there, you…
