Intel SRCU42X Hardware User Guide - Page 18

Hardware

18

1.3.2

Configuration on Disk

Configuration on Disk saves configuration information both in NVRAM on the Intel RAID

Controller SRCU42X and on the disk drives attached to the SRCU42X controller. If the

SRCU42X controller is replaced, the new SRCU42X controller detects the actual RAID

configuration from the configuration information on the drives. This maintains the integrity

of the data on each drive, even if the drives have changed their target ID.

Note:

Configuration on Disk does not work if you change both the SRCU42X

controller and the SCSI connectors to different connectors on the new

SRCU42X controller. It works only if you make one change at a time.

1.3.3

Drive Roaming

The Intel RAID Controller SRCU42Xs support drive roaming across channels on the same

SRCU42X controller. Drive roaming lets an Intel Raid SRCU42X controller detect the actual

RAID configuration, maintaining the integrity of the data on each disk drive, even if the disk

drives have changed channels and/or target ID.

Note:

Intel RAID Controller SRCU42Xs do not support drive roaming across

channels when cluster mode is enabled.

Section	Page
Preface	8
Contents	11
Figures	12
Tables	13
Chapter 1 Overview	15
1.1 Overview	15
1.2 Features	16
1.3 Hardware	17
1.3.1 Storage Adapter Configurations	17
Table 1-1 Intel Raid SRCU42X Adapter Features	17
1.3.2 Configuration on Disk	18
1.3.3 Drive Roaming	18
Chapter 2 Hardware Installation	19
2.1 Requirements	19
2.2 Quick Installation	19
2.3 Detailed Installation	20
Figure 2.1 Install the Battery Backup Unit	20
Figure 2.2 Inserting the SRCU42X Adapter Card in a PCI Slot	21
Table 2-1 Target ID’s	21
Figure 2.3 Terminating an Internal SCSI Disk Array	23
2.4 After You Have Installed the Storage Adapter	24
Chapter 3 Intel RAID Controller SRCU42X Technical Reference	25
3.1 Overview	25
Figure 3.1 Intel RAID Controller SRCU42X Layout	25
Table 3-1 Intel RAID Controller SRCU42X Headers and Connectors	26
3.2 Intel RAID Controller SRCU42X Characteristics	27
Table 3-2 Storage Adapter Characteristics	27
3.3 Technical Specifications	27
3.3.1 Storage Adapter Specifications	27
Table 3-3 Storage Adapter Specifications	27
3.3.2 Array Performance Features	28
Table 3-4 Array Performance Features	28
3.3.3 Fault Tolerance	29
Table 3-5 Fault Tolerance Features	29
3.3.4 Electrical Characteristics	29
Table 3-6 Maximum Power Requirements	29
3.3.5 Thermal and Atmospheric Characteristics	29
3.3.6 Safety Characteristics	30

Intel SRCU42X Hardware User Guide - Page 18

Configuration on Disk, Drive Roaming

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