Raid | Meridian Data 1 guide

RAID 10

Advantages	Disadvantages

Implemented as a mirrored disk array	Very high disk overhead - uses only
whose segments are RAID 0 disk	50% of total capacity
arrays
High I/O rates are achieved thanks to
multiple stripe segments

Recommended Applications for RAID 10

•Imaging applications

•Database servers

•General fileserver

RAID 50

Advantages	Disadvantages

High Read data transaction rate	Higher disk overhead than RAID 5
Medium Write data transaction rate
Good aggregate transfer rate
High reliability
Supports large volume sizes

Recommended Applications for RAID 50

•File and Application servers

•Transaction processing

•Office application with many users accessing small files

RAID 60

	Advantages	Disadvantages

	High Read data transaction rate	High disk overhead – equivalent of two
	Medium Write data transaction rate	drives used for parity
	Medium Write data transaction rate
	Good aggregate transfer rate	Slightly lower performance than RAID
	Good aggregate transfer rate	50
	Safest RAID level	50
	Safest RAID level

Recommended Applications for RAID 60:

•Accounting and Financial

•Database servers

•Any application requiring very high availability

94	EXCEL MERIDIAN DATA

Image 94

Meridian Data 1 manual Raid

Contents

SecurStor Astra ES Contact Information Copyright This page intentionally left blank Table of Contents 105 This page intentionally left blank Introduction to Astra ES About This Manual Astra ES Overview Astra ES FC Host rear view Architectural Description Subsystem and Controller FeaturesOperational Features Highlights Specifications Management FCC Statement Warranty and SupportCE Statement This page intentionally left blank Astra ES Installation Unpacking the Astra ES Mounting Astra ES in a Rack Drive Slot Numbering Installing Disk DrivesMUX Adapter Configuring Direct Attached Storage Configuring a Storage Area NetworkMaking Management and Data Connections Configuring Jbod expansion Serial Attached Scsi Host Configuring Cascaded Storage Connecting the Power Astra ES front panel LED display Secure Connection Logging into Astra GUIRegular Connection Http//192.168.10.85 Using the Header Perusing the InterfaceSelecting a Language Logging out of Astra GUI Using Tree ViewUsing Management View Viewing the Event Frame Working with the Storage Network Working with Subsystems Setting Subsystem Date and Time Setting an Alias for the SubsystemSetting Redundancy for the Subsystem Viewing Subsystem Information Viewing Nvram Events Saving the Runtime Event LogClearing the Runtime Event Log Saving Nvram Events Clearing Nvram Events Making Background Activity SettingsViewing Current Background Activities Running PDM Running Background ActivitiesRunning Media Patrol Viewing Scheduled Activities Deleting a Scheduled Activity Setting the LockViewing Lock Status Releasing the Lock Managing UsersRenewing the Lock Viewing User Information Modifying Your Own User Settings Making User SettingsSetting-up User Event Subscriptions Creating a User Changing Another User’s PasswordChanging Your Own Password List of User Privileges Deleting a User Modifying Subsystem Management Port SettingsManaging the Network Connection Viewing User Sessions Managing Fibre Channel Connections Modifying Controller Management Port SettingsViewing Fibre Channel Node Information Viewing Fibre Channel Port Settings Modifying Fibre Channel Port Settings Viewing SFP Information Port Setting InformationViewing Fibre Channel Port Statistics Clearing Statistics Viewing Fibre Channel Initiators Managing SAS ConnectionsViewing Fibre Channel Logged-in Devices Adding an Initiator Viewing SAS Port Statistics Modifying SAS Port SettingsViewing SAS Initiators Deleting an Initiator Managing Storage ServicesAdding an Initiator Viewing the LUN Map Enabling LUN Masking Managing Software ServicesManaging Email Settings Adding a LUN Map Managing SLP Settings Starting or Restarting SLP service Managing Web Server SettingsManaging Telnet Settings Stopping Web Server service Starting or Restarting Telnet service Managing Snmp SettingsStopping Telnet service Adding Trap Sinks Starting or Restarting Snmp service Managing CIM SettingsStopping Snmp service Stopping CIM service Managing Netsend Settings Exporting the User Database Importing a User Database Clearing Statistics Restoring Factory DefaultsUpdating the Firmware Click the Clear Statistics link Managing Controllers Shutting Down the SubsystemRestarting the Subsystem Viewing the Controllers Locating a Controller Adjustable itemsViewing Controller Information Viewing Controller Statistics Modifying Controller SettingsUpgradable items Viewing the Enclosures Managing EnclosuresClearing an Orphan Watermark Locating an Enclosure Viewing FRU VPD Information Modifying Enclosure SettingsViewing Enclosure Information Checking the Batteries Testing the Buzzer Reconditioning a BatteryManaging Buzzer Settings Battery Notes Viewing a List of Physical Drives Modifying Global Physical Drive SettingsManaging Physical Drives Identifying a Physical Drive Viewing Physical Drive Information Modifying Physical Drive SettingsViewing Physical Drive Statistics Clearing Stale and PFA Conditions Forcing a Physical Drive Offline or Online Creating a Disk Array Managing Disk ArraysViewing Disk Arrays Creating a Disk Array Automatic Creating a Disk Array Express Creating a Disk Array Advanced Logical Drive Creation Disk Array CreationSummary Viewing Disk Array Information Deleting a Disk ArrayDisk Array Operational Status Managing Disk Array Settings Creating a Logical Drive Deleting a Logical Drive Migrating a Disk Array Running PDM on a Disk Array Rebuilding a Disk ArrayRunning Media Patrol on a Disk Array Rebuilding Automatically Transitioning a Disk Array Preparing a Disk Array for Transport Viewing Logical Drive Information Managing Logical DrivesViewing Information for All Logical Drives Logical Drive Status Initializing a Logical Drive Managing Logical Drive SettingsViewing Logical Drive Statistics Logical Drive Synchronization Running Redundancy Check Viewing the Logical Drive Check Table Table Definitions Managing Logical Drive LUN SettingsLUN Mapping Parameters Locating a Spare Drive Managing Spare DrivesViewing a List of Spare Drives Creating a Spare Drive Modifying Spare Drive Settings Deleting Spare Drive Securstor Astra ES Viewing a List of All Logical Drives Working with the Logical Drive SummaryRunning Spare Check Viewing Individual Logical Drive Information Maintenance Install a New Power Supply Replacing a Power SupplyRemove the Old Power Supply Restarting the Subsystem Replacing a Cooling Unit Blower Remove and Replace a Blower Thumbscrews on blower Replacing a Cache Battery Removing the cooling unit from enclosure Dual Controller Subsystem Installing the new controllerReplacing a RAID Controller Removing the old controller Single Controller Subsystem Replacing Astra ES controller This page intentionally left blank Technology Background Introduction to RAID Data Stripe Disk Driv es RAID 0 Stripe Data Mirror Disk Driv es RAID 1 Mirror RAID 1E Enhanced Mirror Enhanced Data Mirrors Disk Driv es RAID 5 Block and Parity Stripe Distributed Parity Data Blocks Disk Driv es RAID 6 Block and Double Parity Stripe RAID 6, stripes all drives with data and double parity Data Stripe Mirror Disk Driv es RAID 10 Mirror + Stripe RAID 50 Striping of Distributed Parity RAID 50 Axles RAID 50 Array No. of Drives No. of Axles Drives per Axle RAID 60 Striping of Double Parity RAID 60 Axles RAID 60 Array No. of Drives No. of Axles Drives per Axle Choosing a RAID Level Advantages Disadvantages RAID 1E RAID TB Limitation Choosing Stripe SizeChoosing Sector Size Logical Drive Size Sector Size Read Cache Policy Cache PolicyLUN Affinity Write Cache Policy Disk Array Creation Logical Drive SettingsCapacity Coercion Failover and Failback Hot Spare Drives InitializationPartition and Format the Logical Drive Increase Redundancy From Capacity RAID Level MigrationAdd Lose Media Patrol 100 101 Predictive Data Migration PDMTransition PDM Triggers 102 Following is an example to explain the Transition function Automatic Transition 103Manual Transition 104 105 Beep TonesLEDs Display Front Panel State LEDs 106Front of Enclosure Steady Flashing Amber Red Green 107 Drive Status IndicatorsDrive Status Indicators Back of Enclosure State LEDs 108 Astra Web GUI Reports a ProblemError Dirty Cache Controller LEDs 109 Example of Yellow !’s and Red X’s in Tree View of Web GUI Reported Event Corrective Action Battery Battery EventsEvent Notification Response Cache Events 111Blowers Events Reported Event Corrective Action Blowers Disk Array Events 112Controller Events Reported Event Corrective Action Controller Enclosure Events 113Drive Interface Controller Events Reported Event Corrective Action Drive Interface Controller Fibre Channel Events 114Event Log Events Reported Event Corrective Action Event Log Host Interface Controller Events 115Reported Event Corrective Action Host Interface Controller Logical Drive Events 116Reported Event Corrective Action Logical Drive Media Patrol Events 117Reported Event Corrective Action Media Patrol Online Capacity Expansion Events 118Reported Event Corrective Action Online Capacity Expansion PDM Events 119Reported Event Corrective Action 120 Reported Event Corrective Action Physical Disk 121 Physical Disk Events 122 Reported Event Corrective Action PSU Power Supply UnitsPSU Events PSU Fans Events 123Reported Event Corrective Action PSU Fans RAID Level Migration Events 124Reported Event Corrective Action RAID Level Migration Rebuild Events 125Reported Event Corrective Action Rebuild Resource Events 126Redundancy Check Events Reported Event Corrective Action Redundancy Check Spare Drives Events 127Spare Check Events Smart Events Stripe Level Migration Events 128Reported Event Corrective Action Stripe Level Migration System Events 129Synchronization Events Reported Event Corrective Action Synchronization Transition Events Critical & Offline Disk Arrays130 Watermark Events With a Hot Spare Drive When a Physical Drive Fails131 Without a Hot Spare Drive 132 Physical Drive ProblemsIncomplete Array Physical Drive Offline Physical Drive Fails during Migration 133Physical Drive Failed Physical Drive Fails during Transport 134 Enclosure ProblemsOverheating Power Supplies 135 136 137 138 139 Installing a Second ControllerDual Controllers and Sata Drives