RAID controller Hewlett-Packard (HP) NetRAID-4M D9161A 

The NetRAID 4M Controller offers configuration flexibility and intelligent storage management to ensure continuous high-performance access to network data. Using four Ultra3 SCSI channels, the HP NetRAID 4M Controller is the ideal solution for enterprise server environments. It features a 233MHz Intel StrongARM-110 RISC processor and a 64-bit, 33MHz PCI interface for efficient I/O. It can provide up to 160MB/s per channel and incorporates a 128MB ECC read/write DRAM cache and a battery backup on a transferrable daughter card that lets you retrieve data up to 72 hours after a power or equipment failure. It supports RAID levels 0, 1, 3, 5, 10 and multi-level containers and up to 12 devices per channel, for a total of 48 drives and 2.22TB of possible storage. Compatibility with Ultra2, LVD, and SE Wide drives makes upgrading simple. Cyclical Redundancy Checking and Domain Validation reduce errors and increase performance. The NetRAID 4M comes with Flexible Array Storage Tool (FAST) for NetRAID.

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