Dell PERC 4/DC - Manual (Page 5)

Configuration Features
Table 2 -3 lists the configuration features for the RAID controller.
Table 2-3. Configuration Features
1 Hot swap of drives must be supported by enclosure or backplane.
Firmware Upgrade
You can download the latest firmware from the Dell website and flash it to the firmware on the board. Perform the following steps to upgrade the firmware:
1. Go to the support.dell.com website.
2. Download the latest firmware and driver to a diskette.
The firmware is an executable file that downloads the files to the diskette in your system.
3. Restart the system and boot from the diskette.
4. Run pflash to flash the firmware.
SMART Hard Drive Technology
The Self-Monitoring Analysis and Reporting Technology (SMART) detects predictable hard drive failures. SMART monitors the internal performance of all motors,
heads, and hard drive electronics.
Drive Roaming
NOTE: Unlike initialization of logical drives, background initialization does not clear data from the drives.
Specifications PERC 4/SC PERC 4/DC PERC 4e/DC
RAID levels 0, 1, 5, 10, and 50 0, 1, 5, 10, and 50 0, 1, 5, 10, and 50
SCSI channels 1 2 2
Maximum number of drives
per channel
14 14 (for a maximum of 28 on two
channels)
14 (for a maximum of 28 on two
channels)
Array interface to host PCI Rev 2.2 PCI Rev 2.2 PCI Express Rev. 1.0a
Cache memory size 64 MB SDRAM Up to 128 MB SDRAM Up to 128 MB SDRAM
Cache Function Write-back, write-through, adaptive
read-ahead, non read-ahead, read-
ahead
Write-back, write-through, adaptive
read-ahead, non read-ahead, read-
ahead
Write-back, write-through, adaptive
read-ahead, non read-ahead, read-
ahead
Number of logical drives and
arrays supported
Up to 40 logical drives and 32 arrays
per controller
Up to 40 logical drives and 32 arrays
per controller
Up to 40 logical drives and 32 arrays
per controller
Hot spares Yes Yes Yes
Flashable firmware Yes Yes Yes
Hot swap devices supported
1
Yes Yes Yes
Non-disk devices supported Only SCSI accessed fault-tolerant
enclosure (SAF-TE) and SES
Only SAF-TE and SES Only SAF-TE and SES
Mixed capacity hard drives Yes Yes Yes
Number of 16-bit internal
connectors
1 2 2
Cluster support No Yes Yes
NOTICE: Do not flash the firmware while performing a background initialization or data consistency check, as it can cause the procedures to fail.