LaCie 2big Network 2 Hard Disk Manual - Tape Resources
LaCie 2big Network 2 Hard Disk Manual - Tape Resources
LaCie 2big Network 2 Hard Disk Manual - Tape Resources
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<strong>LaCie</strong> <strong>2big</strong> <strong>Network</strong> 2 • DESIGN BY NEIL POULTON Administering Your <strong>LaCie</strong> <strong>2big</strong> <strong>Network</strong> 2<br />
User <strong>Manual</strong> page 59<br />
4.17.2. About RAID Modes<br />
RAID0: RAID 0 (also called Spanning mode in some <strong>LaCie</strong> devices),<br />
is the fastest RAID mode. In a RAID 0 array, the available capacities<br />
of each disk are added together so that one logical volume mounts<br />
on the computer (Fig. 83). It offers the best performance but no<br />
protection in the case that a disk fails.<br />
RAID 0<br />
CAUTION: If one physical disk in the array fails, the data of all<br />
disks becomes inaccessible because parts of the data have been<br />
written to all disks.<br />
RAID1: RAID 1 is a secure RAID mode that requires at least 2 drives<br />
and works with pairs of drives (Fig. 84). RAID 1 provides maximum<br />
data safety in the event of a single disk failure, but because data is<br />
written twice, performance is reduced slightly when writing. RAID 1 is<br />
a good choice when safety is more important than speed.<br />
A1<br />
A2<br />
B1<br />
B2<br />
C1<br />
C2<br />
D1<br />
D2<br />
E1<br />
E2<br />
<strong>Disk</strong> 1 <strong>Disk</strong> 2<br />
RAID Mode Capacity Protection<br />
RAID 0 100%<br />
Fig. 83<br />
RAID 1 50%<br />
RAID 1<br />
A1<br />
B1<br />
C1<br />
D1<br />
E1<br />
A1<br />
B1<br />
C1<br />
D1<br />
E1<br />
<strong>Disk</strong> 1 <strong>Disk</strong> 2<br />
Fig. 84
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