From: Stephan Loescher <loescher@leo.org> To: linux-scsi@vger.rutgers.edu, AIC7xxx@FreeBSD.ORG Subject: Kernel freeze Message-ID: <m3pv53uqoy.fsf@sl.sl.de>
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Hi! I have the following problem with kernel 2.2.6: When I copy a lot of large files from my harddisk (IBM DCAS-34330W) to my magneto-optical (MO) drive, then after some time (5 seconds to several minutes) the Linux kernel stops. The system is freezed and the SCSI-bus led, the MO-led and the harddisk-led is lighting. I canīt log into my system. Mouse and keyboard are "dead". The source- and target-filesystems are ext2. I have tried 2.2-kernels since 2.2.2 with and without all AC-patches. I have also tried the 5.1.14-aic7xxx-driver. Also disabling all aic7xxx-features does not help. I tried these options: aic7xxx=verbose, aic7xxx=pci_parity, aic7xxx=verbose:0x1ffff and disabled TAGGED_QUEUEING at all. I can copy files between all my harddisks without any error. I can reproduce this behaviour. With kernel 2.0.33 there are no problems! My system: Pentium-200 SCSI-HA: Adaptec 3490U MO: Olympus Deltis-320 at ID0 on channel A (scsi0) Harddisks: Seagte ST32430N, IBM DCAS-34330, IBM DCAS-34330W on channel B (scsi1) Others: SONY CDROM CDU-76S, TANDBERG NS20 Pro on channel B (scsi1) and HP ScanJet on channel A (scsi0) What was changed in the SCSI-code in the kernel since 2.0.33? Or is the bug located in the aic7xxx-code? Could it be a problem with the two SCSI-channels on the 3940U? Is it perhaps a PCI-problem with the PCI-PCI-bridge on the 3940U? Or is the bug located somwhere else? (ext2, buffer-cache, memory-management, ...) What can I do to help finding the bug? (linux/Documentation/BUG-HUNTING seems impossible to me, because there are so much versions between 2.0.33 and 2.2.x.) Stephan. -- loescher@leo.org http://www.leo.org/~loescher/ Try the LEO-archive: http://www.leo.org/archiv/archiv_e.html To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe aic7xxx" in the body of the message
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