> # SCSI Flow Statistics Overview

> The statistics that can be collected for SCSI flows include the following:

> - SCSI reads
> - Number of I/Os
> - Number of I/O blocks
> - Maximum I/O blocks
> - Minimum I/O response time
> - Maximum I/O response time
> - SCSI writes
> - Number of I/Os
> - Number of I/O blocks
> - Maximum I/O blocks
> - Minimum I/O response time
> - Maximum I/O response time
> - Other SCSI commands (not read or write)
> - Test unit ready
> - Report LUN
> - Inquiry
> - Read capacity
> - Mode sense
> - Request sense
> - Errors
> - Number of timeouts
> - Number of I/O failures
> - Number of various SCSI status events
> - Number of various SCSI sense key errors or events

> To take advantage of this feature, only the initiator must be directly attached to an SSM.

> Note The SCSI flow statistics feature requires the Enterprise Package license installed only on the initiator switches.

> Note For SCSI flow statistics, the initiator must connect to an SSM on a Cisco MDS switch while the target can connect to any other switch in the fabric. The SCSI flow initiator and target cannot connect to the same switch.

> Copyright 2010-2015, Cisco Systems, Inc. All rights reserved.