Lacie 4big Quadra White Paper
Lacie 4big Quadra Manual
 |
View all Lacie 4big Quadra manuals
Add to My Manuals
Save this manual to your list of manuals |
Lacie 4big Quadra manual content summary:
- Lacie 4big Quadra | White Paper - Page 1
of users, LaCie's professional storage devices utilize RAID technology. RAID ( mode to optimize the speed, security or storage capacity of the hard drives in the RAID array. Important: No RAID configuration will protect data reliability from software or file system corruption. As a result, LaCie - Lacie 4big Quadra | White Paper - Page 2
JBOD RAID Selection Standard RAID levels RAID 0 RAID 0 (also called FAST mode in some LaCie devices), is the fastest RAID mode. Requiring at least 2 drives, RAID 0 stripes data onto each disk. The available capacities of each disk are added together so that one logical volume mounts on - Lacie 4big Quadra | White Paper - Page 3
LaCie RAID Technology White Paper RAID 1 RAID 1 (also called SAFE mode in some LaCie devices) is a secure RAID mode that requires at least 2 drives and works with pairs of drives. One logical volume mounts on the computer and the combined available capacity of both drives is limited to the capacity - Lacie 4big Quadra | White Paper - Page 4
with RAID 3 ✦✦ LaCie 4big quadra RAID 3 A1 A4 B1 B4 C1 C4 Disk 1 A2 A5 B2 B5 C2 C5 Disk 2 A3 A6 B3 B6 C3 C6 Disk 3 Ap(1-3) Ap(4-6) Bp(1-3) Bp(4-6) Cp(1-3) Cp(4-6) Disk 4 RAID 0 RAID 1 RAID 3 RAID 3+Spare RAID 5 RAID 5+Spare RAID 6 RAID 0+1 RAID 10 Concatenation JBOD RAID Selection How RAID - Lacie 4big Quadra | White Paper - Page 5
immediate attention because the system rebuilds itself using the hot spare, but the failed disk should be replaced as soon as possible. LaCie Products with RAID 3+Space ✦✦ LaCie 4big quadra How RAID 3+Space Capacity Is Calculated Each disk in a RAID 3+Spare system should have the same capacity - Lacie 4big Quadra | White Paper - Page 6
does not result in a service interruption because data is read from parity blocks. RAID 5 is useful for archiving and for people who need performance and constant access to their data, like video editors. LaCie Products with RAID 5 ✦✦ LaCie 4big quadra ✦✦ LaCie 5big network RAID 5 A1 B1 C1 Dp - Lacie 4big Quadra | White Paper - Page 7
fails. Disk failure does not require immediate attention because the system rebuilds itself using the hot spare, but the failed disk should be replaced as soon as possible. LaCie Products with RAID 5+Spare ✦✦ LaCie 4big quadra ✦✦ LaCie 5big network RAID 5+Spare A1 B1 Cp D1 Disk 1 A2 Bp C1 D2 Disk - Lacie 4big Quadra | White Paper - Page 8
rebuilt onto a replacement disk. This Raid mode can support up to two disk failures with no data loss. RAID 6 provides for faster rebuilding of data from a failed disk. Applications RAID 6 provides data reliability with the addition of efficient rebuilding in the case of a failed drive. RAID 6 is - Lacie 4big Quadra | White Paper - Page 9
LaCie RAID Technology White Paper RAID 0 RAID 1 RAID 3 RAID 3+Spare RAID 5 RAID 5+Spare RAID 6 RAID 0+1 RAID 10 Concatenation JBOD RAID Selection Nested RAID Levels RAID 0+1 RAID 0+1 is a secure RAID mode that is composed of a mirror of striped sets. RAID 0+1 arrays should have disks in multiples - Lacie 4big Quadra | White Paper - Page 10
of a device in half (assuming all disks in the array have the same capacity). RAID 10 RAID 0 RAID 1 RAID 1 LaCie Products with RAID 10 ✦✦ LaCie 4big quadra ✦✦ LaCie 5big network How RAID 10 Capacity Is Calculated Each disk in a RAID 10 system should have the same capacity. Storage capacity in - Lacie 4big Quadra | White Paper - Page 11
LaCie RAID Technology White Paper RAID 0 RAID 1 RAID 3 RAID 3+Spare RAID 5 RAID 5+Spare RAID 6 RAID 0+1 RAID 10 Concatenation JBOD RAID Selection lost. LaCie Products with Concatenation Mode ✦✦ LaCie 2big network ✦✦ LaCie Ethernet Disk ✦✦ LaCie 2big quadra ✦✦ LaCie 4big quadra How Concatenation - Lacie 4big Quadra | White Paper - Page 12
RAID 1 RAID 3 RAID 3+Spare RAID 5 RAID 5+Spare RAID 6 RAID 0+1 RAID 10 Concatenation JBOD RAID Selection JBOD JBOD stands for Just a Bunch of Disks. Each disk in the array, whether part of separate devices or the same device, mounts on the computer as a separate disk. LaCie Products with JBOD Mode - Lacie 4big Quadra | White Paper - Page 13
LaCie RAID Technology White Paper LaCie 2big quadra LaCie 4big quadra LaCie big disk quadra LaCie little big disk quadra LaCie Ethernet Disk LaCie 2big network LaCie 5big network RAID0 H H H * H * H RAID 0 RAID 1 RAID 3 RAID 3+Spare RAID 5 RAID 5+Spare RAID 6 RAID 0+1 RAID 10 - Lacie 4big Quadra | White Paper - Page 14
LaCie has earned an excellent reputation for producing products that are the perfect synthesis of form and function. Our hard disks, network and RAID solutions, optical drives contact our excellent technical support or locate the sales office or reseller nearest you. www.lacie.com While reasonable
-
1 -
2 -
3 -
4 -
5 -
6 -
7 -
8
-
9
-
10
-
11
-
12
-
13
-
14
 |
 |
RAID Technology White Paper
As specialists in data storage, LaCie recognizes that almost all computer users will need a storage or backup solution and that
people use and store data in different ways. Depending on their requirements, some people may prioritize performance and ca-
pacity, whereas others may be more interested in security and speed.
In order to meet the storage needs of a wide range of users,
LaCie’s professional storage devices utilize RAID technology.
RAID (
Redundant Array of Independents Disks
) is a simple technology that improves the performance of external storage so-
lutions. RAID allows you to choose the best way to use your device to fit your needs. Simply put, RAID technology either divides or
duplicates the task of one hard disk between many (or as few as two) disks to either improve performance or create data redundancy
in case of a drive failure. You can decide how the device handles data by setting its RAID mode.
This document describes the different RAID levels used in LaCie professional storage devices, and the characteristics used by each
mode to optimize the speed, security or storage capacity of the hard drives in the RAID array.
RAID Terms
To better understand how RAID works, first familiarize yourself with the terms below:
Striping
✦
is the splitting of data between multiple drives. Striped RAID arrays generally aim to merge maximum capacity
into one single volume.
Mirroring
✦
is the copying of data to more than one disk. Mirrored RAID arrays typically allow the failure of at least one disk
in the array without any data loss, depending on the RAID level of the array.
Fault Tolerance
✦
allows a RAID array to continue working (i.e. the data stored in the array is still available to the user) in
the event of a disk failure. Not all mirrored RAID arrays are user friendly. For instance, some RAID devices must be shut
down before a failed disk is replaced, whereas LaCie RAID devices feature “hot-swappaple” disk replacement that allows
the device to remain on, and the data accessible, while the failed disk is replaced.
Important:
No RAID configuration will protect data reliability from software or file system corruption. As a result, LaCie recommends that
regular backups should always be performed to protect data.