If you believe you have a FC SAN performance problem, which NetApp utility would gather both your Solaris
host and storage system data for analysis?

A.
sio_ntap.exe

B.
prestart

C.
poststat

D.
perfstat

Explanation:
https://communities.netapp.com/docs/DOC-1059
Performance and Statistics Collector (perfstat) is a data collection tool with several key properties:
Captures all needed performance information with one command
Captures information from host(s) and filer(s)
Captures all information simultaneously for cross correlation
Operates on all host platforms and all filer platforms
All captured data is recorded in a single plain-text output file
Perfstat comes in exactly two flavors:
Unix/Linux version (perfstat.sh)
Windows version (perfstat.exe)
Supported platforms:
Unix: AIX, HP-UX, Linux, OSF1, Solaris, FreeBSD
Windows: 2000/XP/2003