Dell PERC 4/DC - Manual (Page 7)

Array Performance Features
Table 2 -6 displays the array performance features for the RAID controller.
Table 2-6. Array Performance Features
Fault Tolerance Features
Table 2 -7 describes the fault tolerance capabilities of the RAID controller.
Table 2-7. Fault Tolerance Features
1 The length of data retention depends on the cache memory configuration.
Operating System Software Drivers
Operating System Drivers
Drivers are provided to support the controller on the following operating systems:
l Windows® 2000
l Windows 2003
l Novell® NetWare®
l Red Hat® Linux, Advanced Server, Enterprise
See the CERC and PERC RAID Controllers Operating System Driver Installation Guide for more information about the drivers.
SCSI Firmware
Specification PERC 4/SC, PERC 4/DC, and PERC 4e/DC
PCI host data transfer rate 2 - 4 GB/sec, depending on the system
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 8 KB, 16 KB, 32 KB, 64 KB, or 128 KB
Maximum number of concurrent commands 255
Support for multiple initiators Only on PERC 4/DC and PERC 4e/DC
Specification PERC 4/SC PERC 4/DC PERC 4e/DC
Support for SMART Yes Yes Yes
Optional battery backup for cache memory N/A Yes. Up to 72 hours data retention. 1 Yes. Up to 72 hours data retention.
Drive failure detection Automatic Automatic Automatic
Drive rebuild using hot spares Automatic Automatic Automatic
Parity generation and checking Yes Yes Yes
User-specified rebuild rate Yes Yes Yes
NOTE: We support both 32-bit (x86) and 64-bit (IA64) processors for Windows 2003 and Red Hat Linux.