4.2Configuration on Disk

Configuration on Disk (drive roaming) saves configuration information both in nonvolatile random access memory (NVRAM) on the MegaRAID SCSI 320-0, and on the disk drives controlled by the MegaRAID SCSI 320-0. If the MegaRAID SCSI 320-0 is replaced, the new MegaRAID SCSI 320-0 controller can detect the actual RAID configuration, maintaining the integrity of the data on each drive, even if the drives have changed channel and/or target ID.

4.3Configuration Features

Table 4.1 contains the configuration features for the MegaRAID 320-0.

Table 4.1

Configuration Features

 

 

 

 

 

Specification

 

 

Feature

 

 

 

 

RAID levels

 

 

0, 1, 5, 10, and 50

 

 

 

SCSI channels

 

0 (The MegaRAID 320-0 enables

 

 

 

RAID capability on one or two SCSI

 

 

 

channels controlled by the LSI Logic

 

 

 

53C1030 SCSI chip installed on the

 

 

 

motherboard.)

 

 

 

Maximum number of drives per channel

 

15

 

 

 

Array interface to host

 

PCI 2.2

 

 

 

Drive interface

 

Fast and Wide, Ultra320 single-

 

 

 

ended and low-voltage differential

 

 

 

(LVD)

 

 

 

Upgradeable cache size

 

Cache memory onboard

 

 

 

Cache function

 

Write-through, write-back, adaptive

 

 

 

read-ahead, no read-ahead, read-

 

 

 

ahead

 

 

 

Multiple logical drives/arrays per

 

Up to 40 logical drives per controller

controller

 

 

 

 

 

 

Maximum number of MegaRAID SCSI

 

1

320-0 controllers per system

 

 

 

 

 

 

4-2Features

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