Cache Memory; Configuration On Disk; Configuration Features - LSI MegaRAID SCSI 320-1 RAID Controller Series 520 Hardware Manual

4.2

Configuration on Disk

4.3

Configuration Features

4-2
Configuration on Disk (drive roaming) saves configuration information
both in nonvolatile random access memory (NVRAM) on the MegaRAID
SCSI 320-1, and on the disk drives controlled by the MegaRAID SCSI
320-1. If the MegaRAID SCSI 320-1 is replaced, the new MegaRAID
SCSI 320-1 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.
Table 4.1 contains the configuration features for the MegaRAID 320-1.
Table 4.1 Configuration Features
Specification
RAID levels
SCSI channels
Maximum number of drives per channel 15
Array interface to host
Drive interface
Upgradeable cache size
Cache function
Multiple logical drives/arrays per
controller
Maximum number of MegaRAID SCSI
320-1 controllers per system
Online capacity expansion
Hot spare support
Features
Copyright © 2002 by LSI Logic Corporation. All rights reserved.
Feature
0, 1, 5, 10, and 50
1
PCI 2.2
Fast and Wide, Ultra320 single-
ended and low-voltage differential
(LVD)
Cache memory onboard
Write-through, write-back, adaptive
read-ahead, no read-ahead, read-
ahead
Up to 40 logical drives per controller
12
Yes
Yes