Alex Paschal <apasc...@msiinet.com> writes: >[...] > Have a look at the 'fcstat' command recently introduced into AIX. This > will output an unpleasant bunch of data, but some nice scripting can > isolate the FC SCSI Traffic Input Bytes and Output Bytes lines for the > desired HBA, even if the HBA doesn't have disk on it. A loop, fcstat | > grep | awk, sleep , and a subtraction will give you bytes/second > numbers. Heck, it'll even give you cool stuff like IP over FC bytes if > you use it.
Cute. IBM: Please, make the command work on the JS21 (1st generation blades), too! Currently it's not operational there - surely that's because of the QLOGIC HBAs. We happened to get a bunch of (4-way) JS21s, and (given fast FC disks) they make for surprisingly speedy TSM servers, likely because of their CPU horsepower. As regards basic tape I/O statistics: In 'topas', the "Readch/Writech" values (upper right corner) have always included tape I/O. Served me well enough in the past ... - Wolfgang J Moeller @ GWDG (who had to help IBM adapt the _TSM_device_drivers_ to the QLOGIC HBA :-)
