Originally posted by: SystemAdmin

While using nmon v11e, I noticed that my "Adapter-I/O" reads are displayed
but the writes are 0.0.

I am guessing this is because this is a TSM server that is reading from
disk storage pools and writing to tape (migration process). If this is
true, is there anyway the tape I/O which should be included in the
"Adapter-I/O" as it truly is adapter I/O?
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Originally posted by: nagger

First, nmon questions usually go on the Performance Tools Forum.

Second, if you update nmon to the latest nmon12 you will find Fibre Channel stats are now available.

If your tapes use FC then you can monitor them.
I hear from customers that most separate tape and disks to different FC adapters. If this is the case, you can clearly see the tape drives using this method.

In email you have also found the FAQ for nmon, where it points out adapter stats are really only the disk stats added up and don't include tape stats as they are note available.

I also hear that in the very latest AIX releases there are now some tape stats for ATAPE devices - not actually found a working example yet!

Hope this helps, thanks Nigel
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