Block and Parity Striping RAID | Promise Technology 66 Pro instruction

SuperTrak66™ User's Manual

Appendix A

Block and Parity Striping (RAID 5)

RAID 5 is similar to RAID 3 as described above except that the parity data is rotated across the physical drives along with the block data. Having the parity data striped across all the physical drives in this manner removes the random write performance bottleneck of RAID 3. The total capacity of a RAID 5 array is calculated the same as a RAID 3 array.

Figure A5: RAID 5 stripes all drives with data and parity info

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Promise Technology 66 Pro user manual Block and Parity Striping RAID

Contents

Version Important Data Protection Info Table of Contents Using SuperCheck SuperCheck Setup Console Functions Enclosure Functions88 RAID Setup Troubleshooting Vii Viii Common expressions Common identifiersKey Page Promise Technology, Inc What is SuperTrak66? Key Features Windows 95/98 System RequirementsOperating System Support Windows NT Other Operating Systems Unpacking SuperTrak66 Getting Started Cables SuperTrak66 Controller Card Software Installation Quick Installation ChecklistHardware Installation Hardware Installation Firewall Software InstallationBios Utility Network Connections Chapter Driver Installed Screen in Existing NT Driver Installation for Existing Windows NT 4.0 System Driver Installed Screen in New NT Driver Installation During New Install of Windows NT SuperCheck Installation Chapter Common Tasks Setup Task Quick ReferenceSetup Checklist Creating an array from the View / Define Array screen Entering the Bios SuperBuild utilityCreating a disk array from the Auto Setup screen Setting the Halt On Error option Track-Mapping SuperTrak Bios ReferenceMode Size Offline StatusFunctional Critical Optimize Array for Auto SetupAuto Setup Options Menu RAID Level Mode Array Disk Capacity Auto Setup ConfigurationSpare Drive Drives Used In Array Capacity MB View Drive AssignmentsChannel ID Drive Model Total Drv View / Define ArrayArray No RAID Level Define Array Definition Menu screen Define Array Definition Menu Creating a RAID 1 Array Creating a RAID 0 ArrayChanging Stripe Block Size Assigning Drives to a RAID 0 Array Creating a Mirroring Array with an Existing Data Drive Assigning Drives to a RAID 3 Array Assigning Four Drives to a Mirroring ArrayCreating a RAID 3 Array Changing Stripe Block Size for RAID 3 Array Creating a Spanning Array Creating a RAID 5 ArrayChanging Stripe Block Size for RAID 5 Array Assigning Drives to a RAID 5 Array Hot Spare Drives Setting a Disk Array As BootableAssigning Drives to a Spanning Array Saved Disk Array Information Delete ArrayDisk Array Recognition Order Delete Array Dialogue Box Controller Configuration Processor Memory Driver VersionNumber of Channels SuperCheck Setup Chapter All Scenarios SuperCheck InstallationInstallation Scenarios To access a SuperTrak system locally To access a SuperTrak system remotely on a WAN To access a SuperTrak system remotely across a LAN Common Component Installation Choose Destination Location window Select Program Folder window Chapter Chapter Adding/Deleting New Users SuperCheck AdministrationSetting Up a New Array Creating Message Servers & Agents Setting Up Email Notification Array Administration Identifying Problems Creating a New User SuperCheck Quick ReferenceTo Create a New Message Server Creating a New Array Accessing Message AgentDeleting an Existing User Adding an User to an Email Receiver List Setting Up E-mail Alert NotificationDeleting an Existing Array Adding/Removing Events to/from Email Alert Notification Removing an User From an Email Receiver List Main Window Using SuperCheck Renaming Displayed Levels Using Tree ViewExpanding/Collapsing Tree View Items Hiding/Displaying Tree View Refreshing SuperTrak Monitoring Using Information View Using Object View SuperCheck Pull-Down Menu/Toolbar Using Status BarUsing Pull-Down Menu Items Connect Using View Pull-Down MenuUsing Connection Pull-Down Menu New Server Viewing Autodemo FontBackground About SuperCheck Contents Find Using Help Find Window Using SuperCheck Toolbar Chapter Creating a New Message Server Console Functions Viewing Console Object icons Labeling New Message Server Deleting a Message Server Disconnecting a Message ServerMessage Server Functions Connecting The Message Server Switching to Another Server Connecting Message Server pull -down Server Name Viewing Message Server Object iconsViewing Message Server Information Label Version Information Confirm / ResetIP Address Message Agent Functions Chapter Setting Up E-mail Alert Notification Removing an User From an Email Receiver List Scheduling Array Synchronization Message Agent Information View Viewing Message Agent Object icons DNS Name, IP Address & Version Info Save User PasswordEmail Alert on Error Current Recipients List Smtp ServerEmail ID Alert Recipients Email Address List Schedule Array Synchronization Alert Events User Management Functions Assigning User Rights Changing PasswordsViewing User/Admin Object icons User Information View PasswordConfirm Password Array Administration Rights User Account Rights Adapter Maintenance RightsCommit / Reset Information View I2O RAID FunctionsViewing I2O RAID Object icons Labeling New Array window IOPx Functions Read/Clear Events pull-down Reading/Clearing Events from SuperTrak Memory Buffer Changing Flush Memory Timing Using The Event Viewer Viewing IOPx Object icons Changing Dirty Threshold Flush Start SettingChanging Dirty Threshold Flush Stop Setting System Information IOPx Information View Total cache size MB Flush frequency timer secSystem Cache Policy Cache block size KB Viewing Channel Object icons Channel chx Functions Hard Drive Functions Viewing Enclosure Object icons Enclosure FunctionsEnabling Rebuild/Synchronization Beeper Enclosure Information View Array Functions Rebuilding An Array Rebuild Wizard Step Using Rebuild Wizard Step Array Rebuild Progress Bar Array Synchronization To Stop Rebuild Halting Synchronization Array Synchronization pull-down Turning On/Off Write Back Cache Turning On Read CacheTurning Off Caching Viewing Array Object icons Viewing Cache Memory Statistics Array Information View Read cache Cache Policy SettingsName Block Size KB RAID access write Cache access readCache access write RAID access read 101 RAID Setup Windows NT File Server Application ScenariosHigh Performance Desktop PCs Working With Large Files Corporate Desktop PC Requiring Data Protection Mid-Sized Windows NT Application Server Striping RAID RAID ImplementationLargest Storage Capacity Required Data striping with dedicated parity drive RAID Mirroring RAIDStriping/Mirroring RAID 0+1 Spanning Block and parity striping RAID Partitioning & Formatting Arrays Rebuilding/Synchronizing Fault Tolerant ArraysRAID Management & Operation Critical & Offline Arrays Fault Tolerance Configuration Ideas Buzzer Alarms Troubleshooting LED Display Codes Message No Array is defined… SuperTrak66 Bios Error MessagesMessage Problem is detected with Array Message Installation & Runtime ProblemsEvent SuperTrak66 Bios does not show up Event No LEDs on card light up RAID 0 Striping Technology Background RAID 0 Striping Mirroring RAID RAID 1 Mirroring Figure A3 RAID 0+1 striping and mirroring of two drive pairs Striping/Mirror RAID 0+1 Block Striping with Parity Drive RAID Appendix a Block and Parity Striping RAID Figure A6 Spanning uses full capacity of drives Spanning I2O technology Appendix a Host Interface Performance-Related FeaturesData Protection Features Physical & environmental SupportMonitoring tools Does the SuperTrak66 controller work with my system’s APM? What kind of hard drives can I use for a SuperTrak66 array?Can I use Atapi devices on the SuperTrak66 controller? Drive Issues Can I make an array on the SuperTrak66 bootable? Why doesn’t Windows NT see my SuperTrak66 controller? Post-Installation Why can’t I see the drives on the SuperTrak66 under FDISK? Appendix C USA Tech Support Center Contacting Technical Support China Office European Tech SupportPacific Rim Sales Office Appendix D Limited Warranty Appendix E Returning Product For Repair Your Responsibilities Bit BootBootstrap Array Appendix G Hot spare FlashFlush Geometry Appendix G Partial read cache hit Appendix G Index Cmos Setup Hardware LED Indicators Assigning drives to C6101ST66000000