Hitachi Data Systems 2107 Parity Group

The Hitachi Data Systems 2107 Parity Group attributes provide performance information about the parity groups in an HDS storage facility.

Average Read Resp: The average read response time to the parity group over the interval, in milliseconds.

Average Write Resp: The average write response time to the parity group over the interval, in milliseconds.

Avg Bytes/ Read Op: The average number of bytes per read operation.

Avg Bytes/ Write Op: The average number of bytes per write operation.

Bytes Read Per Sec: The rate per second at which bytes were read from the parity group over the interval.

Bytes Written Per Sec: The rate per second at which bytes were written to the parity group over the interval.

Managed System: An internal node name used to identify the system from which this row of data was obtained.

Number of Arrays: The total number of arrays that make up the parity group.

Number of arrays with problems: The number of arrays with error conditions of Raid Degraded (one or more array members need rebuilding), DDM Throttling (a near-line DDM in the array is throttling performance due to temperature or workload), or RPM Exception (a DDM with an slower RPM than the normal array DDMs is a member of the array as a result of a sparing action).

Parity Group: The name of the parity group for HDS storage facilities only.

Rank ID: The identification number of the rank.

Read Ops Per Sec: The rate per second that read operations were issued to the rank over the interval.

SSD Rank: Indicates that the parity group is backed by SSD arrays.

Storage Facility ID: The storage facility identifier for the device (Type-Model-Serial Number).

Time Stamp: The date and time associated with this row of data.

Total Bytes Read: The total number of bytes read from the parity group over the interval.

Total Bytes Written: The total number of bytes written to the parity group over the interval.

Total Read Ops: The total number of read operations issued to the parity group over the interval.

Total Read Resp: The total read response time to the parity group over the interval, in milliseconds.

Total Write Ops: The total number of write operations issued to the parity group over the interval.

Total Write Resp: The total write response time to the parity group over the interval, in milliseconds.

Write Ops Per Sec: The rate per second that write operations were issued to the parity group over the interval.