Date: Mon, 8 Sep 1997 15:26:47 -0700 (PDT) From: metcalf@snet.net To: freebsd-gnats-submit@FreeBSD.ORG Subject: kern/4498: Files corrupted when written to Iomega Zip 100 on ProAudioStudio SCSI Message-ID: <199709082226.PAA09975@hub.freebsd.org> Resent-Message-ID: <199709082230.PAA10178@hub.freebsd.org>
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>Number: 4498 >Category: kern >Synopsis: Files corrupted when written to Iomega Zip 100 on ProAudioStudio SCSI >Confidential: no >Severity: serious >Priority: medium >Responsible: freebsd-bugs >State: open >Class: sw-bug >Submitter-Id: current-users >Arrival-Date: Mon Sep 8 15:30:01 PDT 1997 >Last-Modified: >Originator: Jeffrey M. Metcalf >Organization: >Release: 2.2.2-RELEASE >Environment: FreeBSD katya.snet.net 2.2.2-RELEASE FreeBSD 2.2.2-RELEASE #0: Fri Aug 1 17:49:07 EDT 1997 jeff@katya.snet.net:/mnt/usr/src/sys.katya/compile/KATYA i386 >Description: Files of size > 15K will be consistently corrupted when written to an Iomega SCSI 100 disk (both FreeBSD fs and MSDOSFS) if the drive is attached to a ProAudioStudio SCSI adapter. No corruption occurs under LINUX or Windows95 leading me to believe it is a device driver error and not a hardware error. The following message is displayed repeatedly on the console during a write to ZIP medium and is associated with the corruption (file bytes replaced by null characters): nca0/5/0 data length underflow A detailed log of the kernel output as well as specific examples of file corruption can be provided upon request. >How-To-Repeat: Attach an Iomega Zip 100 SCSI drive to a ProAudioStudio (Spectrum?) sound card and compile support into kernel for SCSI adapter and drive controller nca0 at isa? port 0x1f88 bio irq 10 vector ncaintr controller scbus0 device sd0 Make a FreeBSD or MSDOS file system on Zip 100 medium. Mount disk and write a file of size > 15K to the medium. Umount disk Remount disk and copy file back under new name. Compare two files to find the file copied to medium and back has interlaced null bytes corrupting original file bytes. >Fix: Unknown >Audit-Trail: >Unformatted:
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