Use LaCie RAID Manager to create one or more volumes to run with your preferred application.
Your LaCie enclosure must have unassigned hard drives (physical disks) to create a new array. If necessary, you can delete an existing array to make hard drives available for a new array (see Delete Arrays and Virtual Disks for instructions). Since all data will be permanently removed, make certain to back up the existing array before deleting it.
You must know the RAID level that best suits your needs before creating the array. Understanding RAID will help you choose the appropriate number of hard drives for the new array. See Discover LaCie RAID Manager Storage Management for details on RAID.
Follow the instructions below to create a new array:
A new array link appears in your left navigation panel, displaying the new array properties.
You can now create a virtual disk to use as storage volumes.
Stripe size specifies the size of single data block on the virtual disk. Available stripe sizes are 64K, 128K, and 256K. Support for different stripe sizes can vary.
The larger the stripe size, the longer it takes for the RAID controller to read from and write to data blocks on the physical disks. For best read/write performance, a larger stripe size is recommended for applications requiring large data transfers, such as audio, video, and graphics. A smaller stripe size enhances read/write performance for applications with content much smaller in size, such as emails and documents.
Caching data optimizes your LaCie product for best write performance. Write data is stored temporarily in DDR cache memory and flushed to the hard disk at the appropriate time. This means that transfer speeds can be faster since your computer retrieves data directly from the cache rather than searching on the hard drives. However, in the event of power failure, there is a serious risk of losing data integrity if the transfer of data from the DDR cache to the hard disk is not completed.
When data caching is disabled, all data is accessed from the hard drives. This option is recommended when data protection is critical to your workflow. While access to data is not as fast when disk caching is disabled, transfer rates remain quite high due to the use of a hardware RAID controller and Thunderbolt 2 technology.
Virtual disks act as storage volumes for your computer. Following the creation of the virtual disk, use Disk Utility to create a single partition or, divide the virtual disk into multiple partitions. For optimal performance, it is recommended that you reduce the number of partitions and always format using HFS+ (Journaled). To review the number of supported partitions and partition size for your operating system, see Mac OS X: Mac OS Extended format (HFS Plus) volume and file limits.
Caching data optimizes your LaCie product for best write performance. Write data is stored temporarily in DDR cache memory and flushed to the hard disk at the appropriate time. This means that transfer speeds can be faster since your computer retrieves data directly from the cache rather than searching on the hard drives. However, in the event of power failure, there is a serious risk of losing data integrity if the transfer of data from the DDR cache to the hard disk is not completed.
When data caching is off, all data is accessed from the hard drives. This option is recommended when data protection is critical to your workflow. While access to data is not as fast when disk caching is disabled, transfer rates remain quite high due to the use of a hardware RAID controller and Thunderbolt 2 technology.
To help prevent errors handling data, it is recommended that you perform an initialization. During the initialize process, mirror or parity data is checked and updated to ensure consistency of data on the physical disks constituting the virtual disk. Available initialization options during the creation of a virtual disk include:
Gigabyte rounding is applicable to RAID levels using mirroring, such as RAID 1 and RAID 10. It defines the flexibility in size for spare drives used to rebuild degraded virtual disks and arrays. Available options for gigabyte rounding are:
For example, a 120.5 GB physical disk and a 115.7 GB physical disk can create a 115.7 GB RAID 1 virtual disk. If Gigabyte Rounding is set to 1G, then the RAID controller floors the size of the physical disks to the nearest lower GB size. The 120.5 GB and 115.7 GB disks are treated as 120 GB and 115 GB physical disks, resulting in a 115 GB RAID 1 virtual disk. If the 115.7 GB physical disk fails, the virtual disk can be rebuilt with a spare drive sized between 115GB and 115.7 GB, providing flexibility in size up to 0.7 GB. If 10G is select, the rounding would go to the nearest lower 10GB size, which is 110. This would allow the spare to range between 110GB and 115.7GB.
Stripe size specifies the size of single data block on the virtual disk. Available stripe sizes are 64K, 128K, and 256K. Support for different stripe sizes can vary.
The larger the stripe size, the longer it takes for the RAID controller to read from and write to data blocks on the physical disks. For best read/write performance, a larger stripe size is recommended for applications requiring large data transfers, such as audio, video, and graphics. A smaller stripe size enhances read/write performance for applications with content much smaller in size, such as emails and documents.
Any loss, corruption, or destruction of data while using a LaCie hard drive or a LaCie hard drive system is the sole responsibility of the user, and under no circumstances will LaCie be held liable for the recovery or restoration of this data. To help prevent the loss of your data, LaCie highly recommends that you keep TWO copies of your data: one copy on your LaCie storage device; and, a second copy on one of the following: