- Notes, cautions, and warnings
- Getting started
- System concepts
- Storage environment
- Virtual storage
- Linear storage
- Disk groups
- RAID levels
- ADAPT
- Disk group utilities
- SSDs
- Spares
- Pools
- Changing pool settings
- Volumes and volume groups
- Volume cache options
- Overcommitting volumes
- About automated tiered storage
- Initiators, hosts, and host groups
- CHAP
- Host ports
- Attaching volumes to hosts
- Operating with a single controller
- Snapshots
- Copying volumes or snapshots
- Reconstruction
- Quick rebuild
- Updating firmware
- Managed logs
- LDAP
- DNS settings
- Peer connections
- Replication
- Full disk encryption
- Rescanning disks
- Clearing disk metadata
- Data protection during failover to a single controller
- SupportAssist
- About CloudIQ
- Event history
- Audit logs
- System metrics
- Dashboard
- Provisioning
- Working with volumes
- Volumes table
- Data protection table
- Creating volumes
- Modifying volumes
- Deleting volumes and snapshots
- Attaching volumes to hosts
- Detaching volumes from hosts
- Expanding volumes
- Rolling back virtual volumes
- Creating snapshots
- Resetting snapshots
- Copying volumes or snapshots
- Aborting a volume copy
- Add data protection
- Creating a replication set
- Modifying a replication set
- Deleting a replication set
- Initiating or scheduling a replication
- Suspending a replication
- Aborting a replication set
- Resuming a replication
- Managing replication schedules
- Working with hosts
- Working with volumes
- Settings
- Maintenance
- Other management interfaces
- Administering a log-collection system
- Settings changed by restoring defaults
- System configuration limits
- Best practices
- Glossary of terms
Dell PowerVault ME5 Series Administrator's Guide
Downloading historical disk-performance statistics
You can access the FTP or SFTP interface on the storage system and use the get perf command to download historical disk-performance statistics for all disks in the storage system. This command downloads the data in CSV format to a file, for import into a spreadsheet or other third-party application.
The number of data samples downloaded is fixed at 100 to limit the size of the data file to be generated and transferred. The default is to retrieve all the available data (up to six months) aggregated into 100 samples. You can specify a different time range by specifying a start and end time. If the specified time range spans more than 100 15-minute samples, the data will be aggregated into 100 samples.
The resulting file will contain a row of property names and a row for each data sample, as shown in the following example. For property descriptions, see the topic about the
disk-hist-statistics basetype in the CLI Reference Guide.
"sample-time","durable-id","serial-number","number-of-ios", ... "2012-01-26 01:00:00","disk_1.1","PLV2W1XE","2467917", ... "2012-01-26 01:15:00","disk_1.1","PLV2W1XE","2360042", ... ...
Use a command-line-based FTP/SFTP client. A UI-based FTP/SFTP client might not work.
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