Date: Sat, 19 Feb 2005 18:12:14 +0800 From: Rong-En Fan <rafan@csie.org> To: Xin LI <delphij@delphij.net> Cc: scsi@freebsd.org Subject: Re: Problem with mpt(4) and Infortrend RAID Message-ID: <20050219101214.GA96011@svm.csie.ntu.edu.tw> In-Reply-To: <1108806312.602.17.camel@spirit> References: <20050204102558.GA2001@svm.csie.ntu.edu.tw> <1108667040.656.20.camel@spirit> <20050218071746.GA41419@svm.csie.ntu.edu.tw> <20050218202901.GA71842@svm.csie.ntu.edu.tw> <20050219061517.GA92149@svm.csie.ntu.edu.tw> <1108803317.602.13.camel@spirit> <20050219092300.GA95182@svm.csie.ntu.edu.tw> <1108806312.602.17.camel@spirit>
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On Sat, Feb 19, 2005 at 05:45:12PM +0800, Xin LI wrote: > Would you please try: > camcontrol tags da1 > > To see how many tags are actually allowed for the device, at the host > side? It comes to my mind that: I have already done -N 32, I remembered that original is 25x. > ÔÚ 2005-02-19ÁùµÄ 17:23 +0800£¬Rong-En FanдµÀ£º > > Maximum Queued I/O Count - 256 > > LUNs per Host SCSI ID - 8 > > Max Number of Concurrent Host-LUN Connection - Def(4) > > Number of Tags Reserved for each Host-LUN Connection - Def(32) > > Here: You have allowed only 32, and if the host has exceeded the > limitation, then something strange *may* happen. My bet is to decrease I just found the Infortrend's manual, it says that if hos exceeded this limit, the controller will not response and host *might* reduce the # later. Hmm, it seems match my situation. > the tags allowed at host side, to something like 32: > > camcontrol tags da1 -N 32. > > It's also possible to modify cam_xpt.c to set the default number. Hmm, seems ok for me. My system's disk is ips(4) which does not use CAM layer. So, I can put camcontrol to rc. > > I'm not that similar with SCSI, if it possible some parameters > > here need to tune? > > If you have a spare box, try to decrease the tag depth :-) Please be > sure to decrease tag depth on every device. I got no spare box here (to be precise, I can not find another 320 scsi card). So I directly decreast the tag depth on the main server. Hope there is no more timeout and thus I can have a good sleep. Thanks, Rong-En Fan
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