Date: Mon, 21 Jun 1999 18:22:53 +0200 (MET DST) From: Juergen Lock <nox@jelal.kn-bremen.de> To: FreeBSD-gnats-submit@freebsd.org Subject: i386/12326: wdc flag 0x1000 (LBA addressing) prevents crashdumps from working Message-ID: <199906211622.SAA02006@saturn.kn-bremen.de>
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>Number: 12326 >Category: i386 >Synopsis: wdc flag 0x1000 (LBA addressing) prevents crashdumps from working >Confidential: no >Severity: non-critical >Priority: low >Responsible: freebsd-bugs >State: open >Quarter: >Keywords: >Date-Required: >Class: sw-bug >Submitter-Id: current-users >Arrival-Date: Mon Jun 21 09:30:00 PDT 1999 >Closed-Date: >Last-Modified: >Originator: Juergen Lock >Release: FreeBSD 3.2-STABLE i386 >Organization: me? organized? >Environment: wdc0 at 0x1f0-0x1f7 irq 14 flags 0x80ff on isa wdc0: unit 0 (wd0): <QUANTUM FIREBALL ST6.4A>, multi-block-16 wd0: 6149MB (12594960 sectors), 13328 cyls, 15 heads, 63 S/T, 512 B/S wd0: ATA INQUIRE valid = 0007, dmamword = 0407, apio = 0003, udma = 0007 this on a ASUS PCI-I SP3G Intel Saturn motherboard. >Description: Trying flag 0x90ff (the board doesn't have DMA) worked for normal disk IO but not for a crash dump. Changed flag to 0x80ff and crash dumps work again. >How-To-Repeat: boot -c, set flags wdc0 0x90ff and dumpon /dev/wd0b then break into DDB and say `panic'. watch crash dump not taking place... >Fix: ??? If it can't be fixed easily how about documenting the problem, something like, Index: wd.4 =================================================================== RCS file: /home/cvs/cvs/src/share/man/man4/man4.i386/wd.4,v retrieving revision 1.10.2.1 diff -u -r1.10.2.1 wd.4 --- wd.4 1999/05/27 02:48:26 1.10.2.1 +++ wd.4 1999/06/21 15:49:38 @@ -66,6 +66,8 @@ PCI chipsets. .It 0x1000 Use LBA addressing instead of the default CHS addressing. +Note: On some(?) disk/mobo combinations this causes crashdumps to +stop working. .It 0x0f00 Force number of heads to ((flags & 0xf00)>>8), recalculate number of cylinders to match. >Release-Note: >Audit-Trail: >Unformatted: To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-bugs" in the body of the message
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