Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S263724AbUC3PY7 (ORCPT ); Tue, 30 Mar 2004 10:24:59 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S263711AbUC3PY7 (ORCPT ); Tue, 30 Mar 2004 10:24:59 -0500 Received: from witte.sonytel.be ([80.88.33.193]:43483 "EHLO witte.sonytel.be") by vger.kernel.org with ESMTP id S263724AbUC3PXS (ORCPT ); Tue, 30 Mar 2004 10:23:18 -0500 Date: Tue, 30 Mar 2004 17:22:50 +0200 (MEST) From: Geert Uytterhoeven To: =?ISO-8859-15?Q?Andr=E9_Hedrick?= , Bartlomiej Zolnierkiewicz cc: Lionel Bergeret , JunHyeok Heo , Linux Kernel Development , linux-ide@vger.kernel.org Subject: [PATCH] Bogus LBA48 drives Message-ID: MIME-Version: 1.0 Content-Type: TEXT/PLAIN; charset=US-ASCII Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1541 Lines: 34 Apparently some IDE drives (e.g. a pile of 80 GB ST380020ACE drives I have access to) advertise to support LBA48, but don't, causing kernels that support LBA48 (i.e. anything newer than 2.4.18, including 2.4.25 and 2.6.4) to fail on them. Older kernels (including 2.2.20 on the Debian woody CDs) work fine. One problem with those drives is that the lba_capacity_2 field in their drive identification is set to 0, making the IDE driver think the disk is 0 bytes large. At first I tried modifying the driver to use lba_capacity if lba_capacity_2 is set to 0, but this caused disk errors. So it looks like those drives don't support the increased transfer size of LBA48 neither. I added a workaround for these drives to both 2.4.25 and 2.6.4. I'll send patches in follow-up emails. BTW, this problem (incl. a small patch to fix it for 2.4.19, which doesn't work on 2.4.25 anymore) was reported a while ago by JunHyeok Heo, cfr. http://www.cs.helsinki.fi/linux/linux-kernel/2002-42/0312.html Gr{oetje,eeting}s, Geert -- Geert Uytterhoeven -- There's lots of Linux beyond ia32 -- geert@linux-m68k.org In personal conversations with technical people, I call myself a hacker. But when I'm talking to journalists I just say "programmer" or something like that. -- Linus Torvalds - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/