Lacie 2big Thunderbolt™ Series 4 TB User Manual - Page 29

Formatting, Striped RAID Set (RAID 0) - internal hard drives

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FORMATTING The two drives within the 2big Thunderbolt Series and the Little Big Disk Thunderbolt Series are pre-formatted as HFS+ Journaled for your Macintosh computer. Further, the disks have been preconfigured as a Striped RAID Set (RAID 0) for optimal performance. Important info: RAID: You have the option to adjust the RAID configuration as a Mirrored RAID Set for data protection using the Mac OS X Disk Utility. Please note that a Mirrored RAID Set copies the same files to each disk, affecting the transfer rate speed and reducing the available disk capacity by half. STRIPED RAID SET (RAID 0) A Striped RAID Set pairs the two drives within the enclosure for enhanced transfer rates. Data is stored across both disks in a striped pair, allowing them to share the demands of reading and writing files. Unlike a Mirrored Striped Set (RAID 1), the available capacities of each disk are added together for maximum storage availability. With its improved read/write seek rates and maximum storage capacity, a Striped RAID Set is a great complement to the extraordinary performance already offered by the Thunderbolt technology. Data is easy to access since a stripe creates one logical volume that mounts on the desktop. One disadvantage of a Striped RAID Set is the lack of built-in data security. In the event that one disk fails, all the files become inaccessible since parts of each string of data are written across the striped pair. Therefore, LaCie highly recommends backing up data stored on a Striped RAID Set at least once a day. You can back up the data to your computer's internal disk or another hard drive with sufficient capacity. MIRRORED RAID SET (RAID 1) In a Mirrored RAID Set, the two physical disks are mirrored together so that one single logical volume mounts on the desktop. Please note that the combined storage will not exceed the available capacity of the lowest-capacity single disk.All data is saved simultaneously on each disk which means that files will not be lost if one drive should fail. Important info: LaCie recommends that you do not remove one or both disks in a healthy Mirrored RAID Set. Removing a healthy drive may force you to rebuild the Mirrored RAID. For further information on rebuilding a Mirrored RAID Set using Apple Disk Utility, please go to Apple Support. Thunderbolt Series User Manual 29

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Thunderbolt Series User Manual
29
FORMATTING
The two drives within the 2big Thunderbolt Series and the Little Big Disk Thunderbolt Series are pre-formatted
as HFS+ Journaled for your Macintosh computer. Further, the disks have been preconfigured as a Striped RAID
Set (RAID 0) for optimal performance.
Important info:
RAID:
You have the option to adjust the RAID configuration as a Mirrored RAID Set for data protection using the
Mac OS X Disk Utility. Please note that a Mirrored RAID Set copies the same files to each disk, affecting the
transfer rate speed and reducing the available disk capacity by half.
STRIPED RAID SET (RAID 0)
A Striped RAID Set pairs the two drives within the enclosure for enhanced transfer rates. Data is stored across
both disks in a striped pair, allowing them to share the demands of reading and writing files. Unlike a Mirrored
Striped Set (RAID 1), the available capacities of each disk are added together for maximum storage availability.
With its improved read/write seek rates and maximum storage capacity, a Striped RAID Set is a great
complement to the extraordinary performance already offered by the Thunderbolt technology. Data is easy to
access since a stripe creates one logical volume that mounts on the desktop.
One disadvantage of a Striped RAID Set is the lack of built-in data security. In the event that one disk fails, all
the files become inaccessible since parts of each string of data are written across the striped pair. Therefore,
LaCie highly recommends backing up data stored on a Striped RAID Set at least once a day. You can back up
the data to your computer’s internal disk or another hard drive with sufficient capacity.
MIRRORED RAID SET (RAID 1)
In a Mirrored RAID Set, the two physical disks are mirrored together so that one single logical volume mounts on
the desktop. Please note that the combined storage will not exceed the available capacity of the lowest-capacity
single disk.All data is saved simultaneously on each disk which means that files will not be lost if one drive
should fail.
Important info:
LaCie recommends that you do not remove one or both disks in a healthy Mirrored RAID
Set. Removing a healthy drive may force you to rebuild the Mirrored RAID. For further information on
rebuilding a Mirrored RAID Set using Apple Disk Utility, please go to
Apple Support
.