Dell PERC 4/DC - Manual (Page 52)

Table 2-7. Array Performance Features
Fault Tolerance Features
Table 2 -8 describes the fault tolerance capabilities of the RAID controller.
Table 2-8. Fault Tolerance Features
Software Utilities
Table 2 -9 describes the features offered by the utilities used for RAID management. See "RAID Management Utilities" in this section for descriptions of the
utilities.
Table 2-9. Software Utilities Features
Operating System Software Drivers
Operating System Drivers
Drivers are provided to support the controller on the following operating systems:
l Microsoft® Windows NT®
l Windows® 2000
l Windows 2003
l Novell® NetWare®
Specification PERC 4/SC and PERC 4/DC
PCI host data transfer rate 532 MB/sec
Drive data transfer rate Up to 320 MB/sec
Maximum size of I/O requests 6.4 MB in 64 KB stripes
Maximum queue tags per drive As many as the drive can accept
Stripe sizes 2 KB, 4 KB, 8 KB, 16 KB, 32 KB, 64 KB, or 128 KB
NOTE: Using a 2 KB or 4 KB stripe size is not recommended.
Maximum number of concurrent commands 255
Support for multiple initiators Only on PERC 4/DC
Specification PERC 4/SC PERC 4/DC
Support for SMART Yes Yes
Optional battery backup for cache memory N/A Yes. Up to 72 hours data retention for 64 MB cache memory (less for larger cache memory).
Drive failure detection Automatic Automatic
Drive rebuild using hot spares Automatic Automatic
Parity generation and checking Yes Yes
User-specified rebuild rate Yes Yes
Specification PERC 4/SC PERC 4/DC
Management utility Yes Yes
Bootup configuration using the PERC BIOS Configuration Utility (Ctrl–M) Yes Yes
Online read, write, and cache policy switching Yes Yes