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The Smart Array 642 Controller (SA-642) is a 64-bit, 133-MHz PCI-X, dual channel, SCSI array controller for entry-level hardware-based fault tolerance. Utilizing both SCSI channels of the SA-642 allows you to configure up to 6 internal and 14 external hard drives to store up to 2.9 TB of storage.
The 64MB and 128MB BBWC (Battery Backed Write Cache) Enabler upgrade allows the SA-642 controller an option to add transportable BBWC for improved controller performance and increases the total controller memory, up to 192MB. The SA-642 also features complete data compatibility with previous generation's Smart Array controllers to ease data migration from server to server and for easy controller upgradeability.
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ML 300 Server customers
Solving the Customer Problem
Customers need an entry level controller to protect the OS and log files with the flexibility to add the battery memory module for improved controller performance.
- The SA-642 provides RAID protection for OS and small data files to increase server uptime.
- The available 64MB and 128MB BBWC Enabler options offer greater flexibility for increased performance.
- Need more performance or higher levels of data protection? Consider the Smart Array 6400.
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SA-642 |
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| Data Compatible with all Smart Array Controllers |
Yes |
Yes |
Yes |
Yes |
| Instant Upgrades to other Smart Array Controllers |
Yes |
Yes |
Yes |
Yes |
| Consistent Software Management Tools |
Yes |
Yes |
Yes |
Yes |
| PCI Bus |
64-bit, 133 Mhz |
64-bit, 133 Mhz |
64-bit, 133 Mhz |
64-bit, 66 MHz |
| PCI Peak Data Transfer Rate |
1066MB/s |
1066MB/s |
1066MB/s |
533MB/s |
| SCSI Protocol Support |
Ultra 320, Ultra3, Ultra2 |
Ultra 320, Ultra3, Ultra2 |
Ultra 320, Ultra3, Ultra2 |
Ultra3, Ultra2 |
| SCSI Peak Data Transfer Rate |
320MB/s per channel |
320MB/s per channel |
320MB/s per channel |
160MB/s per channel |
| Channels |
2* |
2 |
1 |
2 |
| SCSI Ports (External/Internal) |
2/2* |
1/1 |
0/1 |
1/1 |
| Drives Supported (Max) |
28* |
20 ** |
6 |
20 ** |
| Cache |
128MB DDR-RAM BBWC (upgradeable to 512MB BBWC |
64 MB of DDR-RAM used for code, transfer buffers, and read cache, upgradeable to 192MB of total memory with the 128MB BBWC Enabler |
64 MB of DDR-RAM used for code, transfer buffers, and read cache, upgradeable to 192MB of total with the 128MB BBWC Enabler |
32 MB of DRAM used for code, transfer buffers, and read cache |
| RAID Support |
0, 1, 0+1, 5, ADG |
0, 1, 0+1, 5 |
0, 1, 0+1, 5 |
0, 1, 0+1, 5 |
| Online Spare Support |
Yes |
Yes |
Yes |
Yes |
| BBWC Enabler |
Yes |
Optional |
Optional |
No |
** Drives Supported (maximum) is based on use of HP StorageWorks MSA 30 family (14 hard disk drive enclosure)
* The SA-6402 supports an optional 2-Channel U320 upgrade module, adding support for two additional U320 SCSI channels with two additional external SCSI ports, increasing the total drives supported to 56. |
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