ASRock P4VM890 R2.0 RAID Installation Guide - Page 2

VIA BIOS RAID Installation Guide, Introduction of RAID

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If you insert two HDDs to VIA SATA connectors and plan to configure RAID functions, please refer to VIA RAID installation guide part, including VIA BIOS RAID installation guide and VIA Windows RAID installation guide. 1. VIA BIOS RAID Installation Guide You are allowed to configure RAID functions under BIOS environment. 1.1 Introduction of RAID VIA VT8237 south bridge chipset integrates RAID controller supporting RAID 0, RAID 1, and JBOD functions with two independent SATA channels. This section will introduce the basic knowledge of RAID. RAID The term "RAID" stands for "Redundant Array of Independent Disks", which is a method combining two or more hard disk drives into one logical unit. For optimal performance, please install identical drives of the same model and capacity when creating a RAID set. RAID 0 (Data Striping) RAID 0 is called data striping that optimizes two identical hard disk drives to read and write data in parallel, interleaved stacks. It will improve data access and storage since it will double the data transfer rate of a single disk alone while the two hard disks perform the same work as a single drive but at a sustained data transfer rate. WARNING! Although RAID 0 function can improve the access performance, it does not provide any fault tolerance. Hot-Plug any HDDs of the RAID 0 Disk will cause data damage or data loss. RAID 1 (Data Mirroring) RAID 1 is called data mirroring that copies and maintains an identical image of data from one drive to a second drive. It provides data protection and increases fault tolerance to the entire system since the disk array management software will direct all applications to the surviving drive as it contains a complete copy of the data in the other drive if one drive fails. JBOD (Spanning) A spanning disk array is equal to the sum of all drives. Spanning stores data onto a drive until it is full then proceeds to store files onto the next drive in the array. When any member disk fails, it will affect the entire array. JBOD is not really a RAID, and it does not support fault tolerance. 2

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If you insert two HDDs to VIA SATA connectors and plan to configure RAID functions, please refer to VIA RAID installation guide part, including
VIA BIOS RAID installation guide and VIA Windows RAID installation guide.
1.
VIA BIOS RAID Installation Guide
You are allowed to configure RAID functions under BIOS environment.
1.1
Introduction of RAID
VIA VT8237 south bridge chipset integrates RAID controller supporting RAID 0, RAID 1, and JBOD functions with two independent SATA
channels. This section will introduce the basic knowledge of RAID.
RAID
The term “RAID” stands for “Redundant Array of Independent Disks”, which is a method combining two or more hard disk drives into one logical
unit. For optimal performance, please install identical drives of the same model and capacity when creating a RAID set.
RAID 0 (Data Striping)
RAID 0 is called data striping that optimizes two identical hard disk drives to read and write data in parallel, interleaved stacks. It will improve data
access and storage since it will double the data transfer rate of a single disk alone while the two hard disks perform the same work as a single
drive but at a sustained data transfer rate.
WARNING!
Although RAID 0 function can improve the access performance, it does not provide any fault tolerance. Hot-Plug any HDDs of the RAID 0 Disk will cause data
damage or data loss.
RAID 1 (Data Mirroring)
RAID 1 is called data mirroring that copies and maintains an identical image of data from one drive to a second drive. It provides data
protection and increases fault tolerance to the entire system since the disk array management software will direct all applications to the
surviving drive as it contains a complete copy of the data in the other drive if one drive fails.
JBOD (Spanning)
A spanning disk array is equal to the sum of all drives. Spanning stores data onto a drive until it is full then proceeds to store files onto the next
drive in the array. When any member disk fails, it will affect the entire array. JBOD is not really a RAID, and it does not support fault tolerance.