Viewing Array and Partition Statistics | Galaxy Metal Gear 65

RAID Management

•Manage Galaxy 65 Subsystem > Disk Array Config—includes array status information for the selected array.

•Manage Galaxy 65 Subsystem > Disk Array Config > Disk Drive Status—includes disk drive status information for the selected array.

3.3.1Viewing Array and Partition Statistics

You can view the current array and partition rate and cumulative statistics. The following statistics are available:

•Rate statistics

–I/O operations per second (IOPS)

–Bandwidth (in millions of bytes per second)

•Cumulative statistics

–Number of read operations

–Number of write operations

–Number of sectors (512 bytes) read

–Number of sectors written

–Current command queue depth for each host port

–I/O size for each host port

–Host read/write histogram that shows how many host reads and writes fell into a particular size range. The I/O ranges are based on powers of two.

Tip: This information may be helpful in interpreting performance based on individual system configuration such as HBA, driver configuration, SAN configuration, and host operating system configuration. The statistical information can be useful to profile applications and their usage of an array and partition, which could be used to determine if additional arrays would increase performance and what RAID level is applicable to your needs. You may want to analyze the performance of the same application using different RAID levels to determine which level gives you the best performance. See Appendix A , ”Array Basics”, on page 89 for more details on RAID levels.

Note The statistics are provided as general information for your use, however, they are not intended for benchmarking purposes.

Similar statistics are also available on an aggregate basis for all arrays. For more information, see.

To view the rate statistics:

•From SAM, select Monitor Galaxy 65 Subsystem > Statistics > Partition Rate Stats. To view the cumulative statistics:

•From SAM, select Monitor Galaxy 65 Subsystem > Statistics > Cumulative Part Stats.

3.3.1.1Resetting All Statistics

You can reset the following array and partition statistics to zero:

•Read

•Write

•SecRd

•SecWt

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Image 41

Galaxy Metal Gear 65 manual Viewing Array and Partition Statistics, Resetting All Statistics

Contents

Galaxy 65 User Guide Acknowledgments Contents Operation Managing Disk Drives & Enclosures Troubleshooting and Problem Solving Array Basics Accessing Disk Array Administrator Software Creating and Managing Arrays & Partitions 105 Managing Disk Drives and Enclosures 173 Index 229 Galaxy 65 User Guide Potential for Radio Frequency Interference PrefaceInternational Standards European Regulations Safety Preface Class 1 Laser Product Battery SafetyLaser Safety ESD Precautions Rack System Precautions Related Documentation Data SecuritySpecial Tools and Equipment Resulting in injury or death ConventionsConvention Definition Bold Version Date Description of Change Revision History14 amended 10 planned deleted Preface Xvii Galaxy 65 User Guide Xviii Galaxy 65 System Introduction Enclosure Chassis Enclosure Core Product 3Galaxy 65 Enclosure Chassis Rear Tower Option Plug-in Modules Power Supply/Cooling Module Operators Panel Multiple Power Supply/Cooling ModulesOps Panel Indicators and Switches Loop Resiliency Circuit Input/Output Module FC-AL Switch Function Recommended Definition Number Setting 7LRC Panel Layout 8Galaxy 65 LRC Storage Manager I/O Module 10Drive Carrier Module Drive Carrier Module Drive Status Indicators Visible and Audible AlarmsDummy Carrier Modules Anti-tamper Locks Galaxy 65 Technical Specification Installing your Galaxy 65 SubsystemDimensions Weight Environment PSU Safety and EMC CompliancePower Cord Interfaces Drive Carrier Module Specification RAID Card Galaxy 65 FC-AL LRC I/O Module SpecificationSoftware Enclosure Services SES Support Before You Begin Power On Ops Panel LEDs Power Supply/Cooling Module LEDs Over or Under temperature Any PSU fault or Fan faultIntermittent Ops to ESI Communications failed Audible alarm Invalid address mode setting Disk Drives LEDs Power Up/DownStarting the Drives Galaxy 65 RAID Management Managing Arrays and Partitions Using SAM Viewing Array and Drive Status Information Managing Arrays Viewing Array and Partition Statistics Resetting All Statistics Verifying an Array Click Verify & Update Array ParityStopping the Array Verification Process To stop the array verification process Changing an Array Name Changing Array OwnershipClick Abort Array Verification Click Change Array Name Trusting an Array Select Disk Array Config Trust ArrayDeleting an Array Click Change Options Viewing Partition Status Information Managing PartitionsChanging a Partition Name Click Delete This Array Click Change Partition LUN Changing a Partition LUNClick Change Partition Name Viewing Known WWNs Controlling Partition Access Click Add New Host Creating Nicknames for Host WWNsClick Change Host Nickname Configuring InfoShield Changing the Read-Ahead Cache Size Click Delete Partition Deleting a PartitionClick Set Read Ahead Cache Size Galaxy 65 User Guide Setting Up Remote Notification Monitoring System Status Using SAM Starting and Stopping Remote Notification Setting Up the Events to be MonitoredSetting Up the E-mail Addresses Click Change E-mail Info Saving Log Information to a File Displaying Overall Statistics Resetting the All Statistics Galaxy 65 User Guide Configuring the Galaxy 65 System Configuring the Telnet Timeout Configuring the LAN-related SettingsConfiguring the Snmp Settings Click Change LAN Configuration Click Change System Configuration Configuring the System InformationSetting Passwords Configuring the Security Options Click Change Date/Time Changing the Date and TimeUnderstanding LUNs and Viewing LUN Information Changing Management LUNs Changing the Alarm Mute SettingViewing LUN Information Click Change Management LUN Click Change Configuration Alarm threshold What to do when the alarm sounds Changing the Utility Priority Enabling and Disabling the Battery Rescanning All Ports Pausing I/O Saving a Configuration File Saving and Restoring a Configuration FileRestoring a Configuration File To restore a configuration file Click Continue Click Restore Configuration File Restoring Default Settings Viewing and Restoring Default SettingsViewing Default Settings Click Load Software Package File Click Proceed with Code UpdateUpdating Software Galaxy 65 User Guide Displaying Disk Drive Information Managing Disk Drives Displaying All Devices Clearing Metadata from a Disk DriveViewing Disk Drive Status Click Clear Metadata from Selected Device Enabling and Disabling Write-back Cache Click Change Disk Option ConfigurationDisplaying Disk Drive Cache Status Enabling and Disabling Smart Changes Taking Down a Disk Drive Blinking a Drive LEDClick Blink Selected Device LED Click Down Selected Drive Setting the EMP LUN Testing a Disk DriveManaging Enclosures Click Test Unit Ready Click Update EMP Configuration Changing the Additional EMP Setting Overview Initial Start-up Problems Ops Panel LEDs LED Test Mode Audible AlarmAudible Alarm Mute System Address Hub Green Cooling Troubleshooting Symptom Cause Action System FaultsPower Supply/Cooling Faults Thermal Control State Green Amber Drive Carrier Module FaultsThermal Alarm Auto Start Failure Dealing with Hardware FaultsContinuous Operation During Replacement Problem SAM page help is not displaying Host Fibre Channel ProblemsProblem SAM pages do not display properly Changing the Backoff Percent Using SAM Array ProblemsProblem Array is much smaller than it should be To change the backoff percentage 12.1 Power Supply/Cooling Modules Galaxy 65 Subsystem ProblemsReplacing a Module Removing a PSU Module 2Removing/Inserting a Power Supply/Cooling Module 3Removing a Power Supply/Cooling Module Removing the Module Storage Manager Module 6Removing a Storage Manager Module Insertion/Removal of SFP Modules Battery Replacement 8Storage Manager Module Battery Assembly Location Removal and Replacement Problem Galaxy 65 Subsystem failed the onboard memory test Terminal Emulator and COM Port ProblemsProblem One of the Post diagnostic tests failed Problem Screen continuously puts out garbage characters Problem Screen looks correct, but clock is not being updated Array Critical Event Definition Recommended Action Other WWN SYS Online Fail Errors Collecting Debug Logs Setting Up and Viewing the Debug LogSummary of Debug Log Capabilities Disk Array Administrator on Controller B Utilities Menu Configuring Debug LogsDisk Array Administrator on Controller a Utilities Menu Using SAM to Set Up and View the Debug Log Using the Loader Diagnostics MenuUsing the Disk Array Administrator to Set Up Debug Logging To set up debug logging Understanding Disk-related Errors Using the Loader Utility MenuDisk Errors Sense Key Description Descriptions Disk Channel ErrorsError Code Description Slow Write Performance Voltage and Temperature Errors and Warnings Upgrading Your LRC I/O Modules Spare Parts and Ancillary Items Switch Function Recommended Definition Number Setting Application RAID level Array Basics RAID 0 Striped Disks Array TypesRAID 1, RAID 10 Mirrored Disks RAID Volume Sets RAID Level Min No. Drives Description Strengths Weaknesses Comparing RAID Levels Array Basics Galaxy 65 User Guide Accessing Disk Array Administrator Software Setting Value SettingValue Accessing DAM Using the Ethernet Port for the First Time Accessing the Disk Array Software Using the Ethernet Port 100 Press Esc, CTRL-Z, or ← Navigating the Disk Array Administrator SoftwareDo this Select Function Changing the Screen Display System Menu Disk Array Administrator Menu Tree 2Menu Tree sheet RAID level Minimum Maximum Number Drives Creating Arrays To create a single-partition array Creating a Single-Partition Array 107 See , Array Basics, on page 89, for more information 109 110 To create a multiple-partition array Creating a Multiple-Partition Array 112 113 114 115 116 To view the status of an array Viewing Array and Drive Status InformationViewing Array Status Select Array Status and press Enter To view drive status Viewing Drive Status Select Drive Status and press Enter Stopping the Array Initialization ProcessTo stop the array initialization process Select Abort Initialization and press Enter Select Add a Partition and press Enter Adding a PartitionTo add a partition Galaxy 65 User Guide 123 124 To view verification status Viewing Verification StatusStopping the Verification To stop the verification process Reconstructing an ArrayExpanding Array Capacity Number of drives RAID level Number of drives you can addTo expand an array Select Expand Function and press Enter 128 To change an array name Viewing Expand StatusTo view expand status To trust an array Select Switch Array Owner and press EnterTo change array ownership To delete an array 132 Partition 1 Free space Understanding Partitions Viewing Partition Status From the Array Menu From the All Partitions Menu To view the status of a partitionPartitions Menu and press Enter Enter Viewing Partition Statistics To view the partition statistics Resetting Partition Statistics Expanding a Partition To reset partition statistics To expand a partition To change a partition LUN To change the read-ahead size Enabling or Disabling Write-back Cache To enable or disable write-back cache To view known WWNs 5InfoShield example Select Display Host List and press Enter Select General InfoShield and press Enter To create or change nicknames for WWNs 148 To set up InfoShield Changing All Partitions to Include All Hosts To delete a partition Galaxy 65 User Guide 152 Introduction Monitoring System Status Viewing the Most Recent Event Displaying the Event Log Select View Event Log and press Enter Viewing One Event at a TimeTo view one event at a time To view a whole screen of events Viewing a Whole Screen of Events To capture the event log file Capturing the Event Log To display module status information Displaying Module Status Information Group Field What displays Displaying Hardware Configuration Information Disk To display hardware information only EMP To display hardware and configuration information 163 Select Dump Debug Info and press Enter Displaying Drive Errors Resetting Error Statistics To display drive errors To access the read/write histogram Resetting Overall StatisticsTo access the overall array statistics Managing Spares Adding a Dedicated Spare Managing Dedicated SparesDeleting a Dedicated Spare To add a dedicated spare Enabling Dynamic Spares To enable dynamic spares Managing the Spare Pool Displaying the Spare Pool Adding a Spare to the Spare PoolDeleting a Spare from the Spare Pool Galaxy 65 User Guide 172 Displaying Drive Information Managing Disk Drives and Enclosures Displaying All Drives To display all drives 176 To clear metadata from a drive Displaying Drive Errors and Resetting Error StatisticsClearing Metadata from a Drive To change the write-back cache setting To display disk cache status Displaying Disk Cache Status 180 To enable or disable Smart changes To take down a drive Taking Down a DriveTo blink a drive LED from the Drive Utilities Menu To test a drive Testing a Drive To change the EMP LUN 185 Select the option or number you want to use To change the EMP settings Galaxy 65 User Guide 188 Configuring the Galaxy 65 Subsystem To shut down and restart the current SM Shutting Down and Restarting the Storage Manager ModuleShutting Down and Restarting the Current SM Module Select Shutdown/Restart and press Enter Shutting Down the Other SM Module Other Controller Menu Shutting Down Both SM Modules 193 To set an SM module’s time Host channel Description Setting Configuring the Host Channels Target ID To configure the host channels To view LUN information 198 Configuring the FC Disk Channels To configure the FC disk channels 201 VCC voltage Galaxy 65 CPU temperature Voltage Same as above for the VCC voltage To enable or disable the alarm To lock the cache setting Locking the Cache Setting To change the battery setting Select Utility Priority and press Enter To change the utility priority To rescan all channels Rescanning All Channels To pause I/O To restore the default settings Restoring Default Settings Updating the SM, SM Loader and Memory Controller Firmware Updating Firmware Updating LAN Firmware To upgrade the LAN Subsystem’s firmware Configuring the SM for TCP/IP LAN Configuration To set the IP address, subnet mask, or gateway Configuring the LAN SettingsConfiguring the IP Settings To set the FTP settings Configuring the FTP SettingsConfiguring the Telnet Settings To set the Snmp settings To set the Telnet settings To set the contact settings Configuring the Contact Settings To set the Http settings Configuring the Http Settings To reset the LAN Subsystem Resetting the LAN SubsystemSelect Reset LAN Subsystem and press Enter To change any of the security options Galaxy 65 User Guide 220 Glossary 222 223 224 Glossary Small form-factor pluggable SFP Type of connector 227 Galaxy 65 User Guide 228 Index 164 Partitions 31 Disk drives ESD Http LED Number of Drives screen 108 Setting up for SAM 218 SAM 171 Defined 167 Deleting dedicated 168 Deleting pool Stopping the process