Date: Mon, 17 Feb 1997 01:02:44 -0800 (PST) From: tc@unilog.se To: freebsd-gnats-submit@freebsd.org Subject: kern/2751: 2GB limitation on CCD device partitions still exists. Message-ID: <199702170902.BAA02728@freefall.freebsd.org> Resent-Message-ID: <199702170910.BAA03108@freefall.freebsd.org>
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>Number: 2751 >Category: kern >Synopsis: 2GB limitation on CCD device partitions still exists. >Confidential: no >Severity: serious >Priority: medium >Responsible: freebsd-bugs >State: open >Class: sw-bug >Submitter-Id: current-users >Arrival-Date: Mon Feb 17 01:10:01 PST 1997 >Last-Modified: >Originator: Torbjörn Carlsson >Organization: Unilog Systems AB >Release: 2.1.6-RELEASE >Environment: FreeBSD news1.unilog.se 2.1.6-RELEASE FreeBSD 2.1.6-RELEASE #1: Wed Feb 12 17:49:38 MET 1997 root@news1.unilog.se:/usr/src/sys/compile/NEWS1 i386 >Description: We are trying to build a News spool using the ccd driver that comes with 2.1.6 Hardware: Adaptec 3940UWD SCSI adapter, and Micropolis 3391 WS Diskdrives. (9.1 GB) When using the standard /dev/sd2 devices there is no problems with making 1 partition out of the whole disk and then running newfs on that partition. But when we're trying to use the ccd and map the single large partition the machine crashes with an error-message like this: Feb 7 15:28:19 news1 /kernel: ahc1: ahc_scsi_cmd: more than 256 DMA segs Feb 7 15:28:19 news1 /kernel: sd2: oops not queued Feb 7 15:28:19 news1 /kernel: biodone: buffer already done And from there the only response we get from the machine is when the reset button is pressed. The only way we've been able to use the disks in a ccd-configuration is to partition them down to 2GB partitions and then use ccd to concatenate the partitions. Partitions slightly larger than 2GB crashes the machine in the same way as the single large one. The adaptec driver itself seems to be working, but the combination of adaptec and ccd does not really work. >How-To-Repeat: Add a large disk-partition to the ccd and run the newfs command on the ccd-device. >Fix: >Audit-Trail: >Unformatted:
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