# Cache Raid Rank

The Cache Raid Rank attributes provide performance and usage information for the ranks in an IBM® 2105 storage facility.

Device Adapter ID: The two hexadecimal digit of the device adapter associated with this rank. The device adapter is the hardware component that provides the path control and data transfer functions.

Hard Disk Drives in Rank: The number of disk drives contained in this rank.

Managed System: The SMS name of this system.

Raid Rank ID: The four hexadecimal digit ID associated with this raid rank.

Read MB per Request: The average number of megabytes of data transferred per read request.

Read MB per Second: The average number of megabytes of data transferred per second for read requests.

Read Requests per Second: The average number of read operations per second.

Read Response Time MS: The average response time in milliseconds for read requests.

Read Sectors per Request: The average number of hard disk sections read per read request.

Sector Size: The size in bytes of the sectors on the hard disks associated with this rank.

Sectors Read per Second: The average number of hard disk sectors read per second for read requests.

Subsystem ID Fullword: The subsystem ID of the logical control unit to which this rank is attached.

Subsystem ID: The subsystem ID of the logical control unit to which this rank is attached.

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

Volume: The volume serial number of the first logical volume on this rank.

Write MB Per Request: The average number of megabytes written per request for this rank.

Write MB Per Second: The average number of megabytes of data written per second for this rank.

Write Requests Per Second: The average number of write operations per second for this rank.

Write Response Time MS: The average time in milliseconds required to complete a write operation.

Write Sectors per Request: The average number of physical sectors written per write request.