Date: Wed, 12 Jul 1995 17:41:02 -0500 (CDT) From: Karl Denninger <karl@Mcs.Net> To: tom@misery.sdf.com (Tom Samplonius) Cc: karl@Mcs.Net, rgrimes@gndrsh.aac.dev.com, karl@mcs.com, freebsd-hackers@FreeBSD.ORG Subject: Re: SCSI disk wedge Message-ID: <199507122241.RAA01602@Jupiter.mcs.net> In-Reply-To: <Pine.BSF.3.91.950712141910.1573C-100000@misery.sdf.com> from "Tom Samplonius" at Jul 12, 95 02:24:48 pm
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> > > On Wed, 12 Jul 1995, Karl Denninger wrote: > > > > Can you be more specific about which controller and/or drives you are > > > seing this with? Trying to recall the mail for the last month with > > > ``disk channel hangs'' as the keyword doesn't work for me, my poor old > > > mind is not what it use to be :-) > > > > Aha1742 and AHA 27xx -- both EISA. > > > > On the 27xx driver we get an error, on the 1742 the failure is silent. > > Other than that, the behavior is identical. > > You still haven't mentioned what devices you are using. Yes I have, in a subsequent posting. All disks -- Seagate and Micropolis. No change between the two configurations. > The problem is most certainly related to the type of drives/devices as > the 1742 and 2742 code is completely different. I have both of these > cards (my 2742 is dual-channel), and have used a 1742 extensively with no > problems. Under old snaps, the 2742 used to hang under heavy load, but > I found this to be fixed a couple of weeks before 2.0.5R. Under both of > these cards I can run multiple parallel "iozone"s to multiple drives > without a problem (which is the heaviest disk load that I can simulate). > > Tom My 2742 is also dual-channel. This hang is only seen about once a day, and it is NOT load related. It happens infrequently enough that tracking it is going to be a real bitch. -- -- Karl Denninger (karl@MCS.Net)| MCSNet - The Finest Internet Connectivity Modem: [+1 312 248-0900] | (shell, PPP, SLIP, leased) in Chicagoland Voice: [+1 312 248-8649] | 7 Chicagoland POPs, ISDN, 28.8, much more Fax: [+1 312 248-9865] | Email to "info@mcs.net" WWW: http://www.mcs.net ISDN - Get it here TODAY! | Home of Chicago's only FULL AP Clarinet feed!
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