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MegaRAID Enterprise 1600 Hardware Guide
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Configuration on Disk
Configuration on Disk (drive roaming) saves configuration information both in NVRAM on
MegaRAID and on the disk drives connected to MegaRAID. If MegaRAID is replaced, the new
MegaRAID 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.
Hardware Requirements
MegaRAID can be installed in an IBM AT®-compatible or EISA computer with a motherboard
that has PCI expansion slots. The computer must support PCI version 2.1 or later. The computer
should have an Intel Pentium or more powerful CPU, a floppy drive, a color monitor and VGA
adapter card, a keyboard, and mouse.
Configuration Features
Specification Feature
RAID Levels 0, 1, 3, 5, 10, 30, and 50
SCSI Channels 4
Maximum number of drives per channel 15
Array interface to host 64-bit PCI
PCI bus master Supports write invalidate
Drive interface Wide 160M
Upgradable cache memory sizes 16 MB, 32 MB, 64 MB, or 128
MB,
Cache Function Write-through, write-back, ARA,
NRA, RA
Multiple logical drives/arrays per controller Up to 40 logical drives per controller
Maximum number of MegaRAID
controllers per system
12
Online capacity expansion Yes
Dedicated and pool hot spare Yes
Flashable firmware Yes
Hot swap devices supported Yes
Non-disk devices supported Yes
Mixed capacity hard disk drives Yes
Number of 16-bit internal SCSI connectors 2
Number of external SCSI connectors 4
Support for hard disk drives with capacities
of more than 8 GB
Yes
Clustering support (Failover control) Yes
Online RAID level migration Yes
RAID remapping Yes
No reboot necessary after expansion Yes
More than 200 Qtags per physical drive Yes
Hardware clustering support on the board Yes
User-specified rebuild rate Yes