SCSI Firmware

The PERC 3/QC firmware handles all RAID and SCSI command processing and supports the features described in Table 6-8.

Ta b l e 6 - 8 . S C S I F i r mw ar e

Feature

Description

 

 

Disconnect/

Optimizes SCSI bus utilization

reconnect

 

 

 

Tagged command

Multiple tags to improve random access

queuing

 

 

 

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

 

 

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.

PERC 3/QC Features

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Dell 3 manual Scsi Firmware, Ta b l e 6 8 . S C S I F i r mw ar e