Date: Sat, 19 Feb 2005 17:45:12 +0800 From: Xin LI <delphij@delphij.net> To: Rong-En Fan <rafan@csie.org> Cc: scsi@freebsd.org Subject: Re: Problem with mpt(4) and Infortrend RAID Message-ID: <1108806312.602.17.camel@spirit> In-Reply-To: <20050219092300.GA95182@svm.csie.ntu.edu.tw> 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>
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[-- Attachment #1 --] 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: 在 2005-02-19六的 17:23 +0800，Rong-En Fan写道： > 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 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. > 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. Cheers, -- Xin LI <delphij delphij net> http://www.delphij.net/ [-- Attachment #2 --] -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.0 (FreeBSD) iD8DBQBCFwqn/cVsHxFZiIoRAoDOAJ4hChNXsV6pxOS+zqQqXHrxP/RJmgCeKuRI 4HqG84LkJudWQ5pwOSbrh6U= =SNo3 -----END PGP SIGNATURE-----
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