EMC Symmetrix Storage Tier Performance

Table: EMC Symmetrix Storage Tier Performance

Metric	Description
Percent Disk Busy	The % of time that the disk is busy serving I/O requests.
Total SCSI Commands	The total number of commands performed by the disk group each second: read, write, skip mask, verify, XOR write, and XOR write-read.
Host Reads	The number of host reads performed each second by the disk.
Host Writes	The number of host writes performed each second by the disk.
MB Read	The read throughput of the disk, in MB per second.
MB Written	The write throughput of the disk, in MB per second.
Read Response Time	The average time taken by the disk to serve one read I/O operation .
Write Response Time	The average time taken by the disk to serve one write I/O operation .
Total Disk Capacity	Total capacity of the disk, in GB.
Used Disk Capacity	Total used capacity of the disk, in GB.