Hello, David. 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.
________________________________ Alex Paschal Storage Solutions Engineer MSI Systems Integrators ________________________________ Your Business. Better. -----Original Message----- From: ADSM: Dist Stor Manager [mailto:ads...@vm.marist.edu] On Behalf Of David Bronder Sent: Friday, February 27, 2009 12:34 AM To: ADSM-L@VM.MARIST.EDU Subject: [ADSM-L] Tape performance (was: Re: Preferred TSM Platform) Wanda Prather wrote: > > And there is NO instrumentation in Windows to give you any idea whatever > about what is going on performance-wise on a bus with tape drives attached. Unfortunately, there doesn't seem to be any real instrumentation in AIX about tape drive performance, either. None of the standard AIX tools seem to give tape-related information (e.g. iostat or nmon), either for the tape drives themselves or for the buses or adapters the drives are connected to (unless there is also disk behind those buses or adapters). (Speaking only of FC drives, since the last time I used SCSI tape drives years ago, I never tried to get that data.) So far, neither IBMers nor business partners I've talked to have been able to identify a way of collecting that kind of data, either. The best ideas I've been able to come up with are manual timing tests (measure the time to transfer a known volume of data, whether within TSM or externally) or to look at stats on the fibre ports on the SAN switches (assuming one has that kind of access to the switches). If anyone can tell me differently, I'd love to hear about it. Even if (especially if?) it's something dead simple or obvious that I've been missing. =Dave (sticking with AIX for TSM for the forseeable future) -- Hello World. David Bronder - Systems Admin Segmentation Fault ITS-SPA, Univ. of Iowa Core dumped, disk trashed, quota filled, soda warm. david-bron...@uiowa.edu This message (including any attachments) is intended only for the use of the individual or entity to which it is addressed and may contain information that is non-public, proprietary, privileged, confidential, and exempt from disclosure under applicable law or may constitute as attorney work product. If you are not the intended recipient, you are hereby notified that any use, dissemination, distribution, or copying of this communication is strictly prohibited. If you have received this communication in error, notify us immediately by telephone and (i) destroy this message if a facsimile or (ii) delete this message immediately if this is an electronic communication. Thank you.
