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PERC 3/QC Features 81
SCSI Firmware
The PERC 3/QC firmware handles all RAID and SCSI command
processing and supports the features described in Table 6-8.
RAID Management
RAID management is provided by software utilities that manage and
configure the RAID system and PERC 3/QC, create and manage multiple
disk arrays, control and monitor multiple RAID servers, provide error
statistics logging, and provide online maintenance. They include:
• PERC 3/QC BIOS Configuration Utility (Ctrl-M)
•Dell Manager
• WebBIOS Configuration Utility
• Dell™ OpenManage™ Array Manager
PERC 3 BIOS Configuration Utility
You can use the PERC 3 BIOS Configuration Utility to configure and
maintain RAID arrays, format disk drives, and manage the RAID system. It
is independent of any operating system. See Chapter 11 "PERC 3 BIOS
Configuration Utility" for additional information.
Table 6-8. SCSI Firmware
Feature Description
Disconnect/
reconnect
Optimizes SCSI bus utilization
Tagged command
queuing
Multiple tags to improve random access
Scatter/gather A single command can transfer data to and from different
memory locations.
Multi-threading Up to 255 simultaneous commands with elevator sorting
and concatenation of requests per SCSI channel
Stripe size Variable for all logical drives: 2 KB, 4 KB, 8 KB, 16 KB,
32 KB, 64 KB, or 128 KB.
Rebuild Multiple rebuilds and consistency checks with user-
definable priority