LSI MegaRAID 320 User Manual page 21

Table 1.1 MegaRAID 320 Storage Adapter Comparisons (Cont.)
Cache Function
Multiple Logical
Drives/Arrays per
Controller
Maximum # of
MegaRAID 320
Storage Adapters
per System
Online Capacity
Expansion
Dedicated and
Pool Hot Spare
Hot Swap Devices
Supported
Non-Disk Devices
Supported
Mixed Capacity
Hard Disk Drives
Number of 16-bit
Internal
Connectors
Number of 16-bit
External
Connectors
Cluster Support
Hardware
Exclusive OR
(XOR) Assistance
Direct I/O
Architecture
MegaRAID 320-1 MegaRAID 320-2 MegaRAID 320-2X MegaRAID 320-4X
Write-back, Write- Write-back, Write-
through, Adaptive through, Adaptive
Read Ahead, Non Read Ahead, Non
Read Ahead, Read Ahead,
Read Ahead, Read Ahead,
Cache I/O, Direct Cache I/O, Direct
I/O I/O
Up to 40 logical Up to 40 logical
drives per drives per
controller controller
12 12
Yes Yes
Yes Yes
Yes Yes
Yes Yes
Yes Yes
1 2
1 2
No Yes
Yes Yes
Yes Yes
Fusion-MPT Fusion-MPT
Hardware
Copyright © 2003 by LSI Logic Corporation. All rights reserved.
Write-back, Write- Write-back, Write-
through, Adaptive through, Adaptive
Read Ahead, Non Read Ahead, Non
Read Ahead, Read Ahead,
Read Ahead, Read Ahead,
Cache I/O, Direct Cache I/O, Direct
I/O I/O
Up to 40 logical Up to 40 logical
drives per drives per
controller controller or per
logical array
12 12
Yes Yes
Yes Yes
Yes Yes
Yes Yes
Yes Yes
2 2
2 4
Yes Yes
Yes Yes
Yes Yes
Fusion-MPT Fusion-MPT
1-5