Dell PowerVault ME4 Series Storage System CLI Guide

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show disk-statistics


Description	Shows live or historical performance statistics for disks. For disk performance statistics, the system samples live data every 15 seconds and historical data every quarter hour, and retains historical data for 6 months. The historical option allows you to specify a time range or a number (count) of data samples to include. It is not recommended to specify both the time-range and count parameters. If both parameters are specified, and more samples exist for the specified time range, the samples' values will be aggregated to show the required number of samples. Statistics shown only in API output are described in API basetype properties.
Minimum role	monitor
Syntax	To show live statistics: show disk-statistics [error-stats] [`disks`] To show historical statistics: show disk-statistics [all] [count `number-of-data-samples`] [filename `filename`.csv] historical [time-range "date/time-range"] disks
Parameters	all Optional. Specifies to show the full set of performance metrics. If this parameter is omitted, the default set of performance metrics will be shown. count number-of-data-samples Optional. Specifies the number of data samples to display, from 1 to 100. Each sample will be shown as a separate row in the command output. If this parameter is omitted, 100 samples will be shown. If you specify this parameter, do not specify the time-range parameter. error-stats Optional. Specifies to show live error statistics for all disks or specified disks. If you specify this parameter, do not specify the all, count, historical, or time-range parameters. filename `filename`.csv Optional. Specifies to save historical statistics, in CSV format, to a file on the controller. To access the file, use SFTP or FTP. historical Optional. Specifies to show historical statistics. If this parameter is omitted, live statistics will be shown. time-range "`date/time-range`" Optional. Specifies the date/time range of historical statistics to show, in the format "start yyyy-mm-dd hh:mm [AM\| PM] end yyyy-mm-dd hh:mm [AM\|PM]". If the start date/time is specified but no end date/time is specified, the current date/time will be used as the end date/time. The system will return the oldest sample taken after the start time and the latest sample taken before the end time. If the specified start date/time is earlier than the oldest sample, that sample will be used as the start date/time. If you specify this parameter, do not specify the count parameter. If this parameter is omitted, the most recent 100 data samples will be displayed. `disks` Optional for live statistics. Required for historical statistics. Specifies a comma-separated list of disks for which to show information. If this parameter is omitted, information will be shown for all disks. For disk syntax, see Command syntax
Output	Live Location The disk location in the format disk_`enclosure-ID.slot-number`. Serial Number The serial number of the disk. Pwr Hrs The total number of hours that the disk has been powered on since it was manufactured. This value is stored in disk metadata and is updated in 30-minute increments. Bps The data transfer rate, in bytes per second, calculated over the interval since these statistics were last requested or reset. This value will be zero if it has not been requested or reset since a controller restart. IOPS The number of input/output operations per second, calculated over the interval since these statistics were last requested or reset. This value will be zero if it has not been requested or reset since a controller restart. Reads The number of read operations since these statistics were last reset or since the controller was restarted. Writes The number of write operations since these statistics were last reset or since the controller was restarted. Data Read The amount of data read since these statistics were last reset or since the controller was restarted. Data Written The amount of data written since these statistics were last reset or since the controller was restarted. Lifetime Read The amount of data read from the disk in its lifetime. Lifetime Written The amount of data written to the disk in its lifetime. Reset Time Date and time, in the format `year-month-day hour:minutes:seconds` , when these statistics were last reset, either by a user or by a controller restart. Live, error-stats Location The disk location in the format disk_`enclosure-ID.slot-number`. Serial Number The serial number of the disk. SMART port# The number of SMART events recorded. Time port# The number of timeouts accessing the disk. NResp port# The number of times the disk did not respond. Spin port# The number of attempts by the storage system to spin up the disk. Med port# The number of media errors generated by the disk, as specified by its manufacturer. NMed port# The number of other errors generated by the storage system, or generated by the disk and not categorized as media errors. BAsgn port# The number of times blocks were reassigned to alternate locations. BBlk port# The number of bad blocks encountered. Historical Durable ID The disk ID in the format disk_`enclosure-number.disk-number`. Serial Number The serial number of the disk. Total I/Os The total number of read and write operations since the last sampling time. Reads Shown by the all parameter. The number of read operations since the last sampling time. Writes Shown by the all parameter. The number of write operations since the last sampling time. Data Transferred The total amount of data read and written since the last sampling time. Data Read Shown by the all parameter. The amount of data read since the last sampling time. Data Written Shown by the all parameter. The amount of data written since the last sampling time. Total IOPS The total number of read and write operations per second since the last sampling time. Read IOPS Shown by the all parameter. The number of read operations per second since the last sampling time. Write IOPS Shown by the all parameter. The number of write operations per second since the last sampling time. Total B/s The total data transfer rate, in bytes per second, since the last sampling time. Read B/s Shown by the all parameter. The data transfer rate, in bytes per second, for read operations since the last sampling time. Write B/s Shown by the all parameter. The data transfer rate, in bytes per second, for write operations since the last sampling time. Queue Depth Shown by the all parameter. The average number of pending read and write operations being serviced since the last sampling time. This value represents periods of activity only and excludes periods of inactivity. I/O Resp Time The average response time, in microseconds, for read and write operations since the last sampling time. Read Resp Time Shown by the all parameter. The average response time, in microseconds, for read operations since the last sampling time. Write Resp Time Shown by the all parameter. The average response time, in microseconds, for write operations since the last sampling time. Average I/O Size Shown by the all parameter. The average data size of read and write operations since the last sampling time. Average Read I/O Size Shown by the all parameter. The average data size of read operations since the last sampling time. Average Write I/O Size Shown by the all parameter. The average data size of write operations since the last sampling time. Number of Disk Errors Shown by the all parameter. The total number of disk errors detected since the last sampling time. Error types include: number of SMART events; number of timeouts accessing the disk; number of times the disk did not respond; number of attempts by the storage system to spin-up the disk; media errors generated by the disk as specified by its manufacturer; non-media errors (generated by the storage system, or by the disk and not categorized as media errors); number of bad-block reassignments. Sample Time Date and time, in the format `year-month-day hour:minutes:seconds`, when the data sample was taken
Examples	Show live statistics for disks 1.1 and 2.1. # show disk-statistics 1.1,2.1 Show live error statistics for all disks. # show disk-statistics error-stats Show historical statistics from a specified date and time range for disk `1.5`. # show disk-statistics 1.5 historical time-range "start 2011-12-05 4:40 PM end 2011-12-05 5:00 PM" Show all samples of historical statistics for disk `1.5`. # show disk-statistics 1.5 historical all
Basetypes	disk-statistics (live) drive-summary (historical) status
See also	reset all-statistics reset disk-error-statistics reset disk-statistics show disk-group-statistics show disks