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4-2 Features
Copyright © 2002 by LSI Logic Corporation. All rights reserved.
4.2 Configuration 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.
4.3 Configuration 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
controller
Up to 40 logical drives per controller
Maximum number of MegaRAID SCSI
320-0 controllers per system
1