Date: Fri, 25 Jun 1999 09:36:31 +0400 From: Alex Povolotsky <tarkhil@asteroid.svib.ru> To: David Kelly <dkelly@hiwaay.net> Cc: hardware@freebsd.org Subject: Re: CDRecord not seeing CD-R Message-ID: <199906250536.JAA83650@shuttle.svib.ru> In-Reply-To: Your message "Thu, 24 Jun 1999 20:54:42 CDT." <199906250154.UAA30336@nospam.hiwaay.net>
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<199906250154.UAA30336@nospam.hiwaay.net>David Kelly writes: >> to your kernel, enable POSIX realtime and NEVER try to run any disk-hog like >> tcl/tk while writing! > >It was a year or two ago when I first tried FreeBSD and cdrecord for >burning CDs. Was so darn successful at it that before I finished the >batch of 50 or so CD's I was trying pretty hard to break it. > >System was FreeBSD 2.2.5 or 2.2.6 or thereabouts. Cdrecord 1.6. Pentium >133. Before we knew about the F00F bug. Had a whopping 24MB of RAM. >Running X, twm as the window manager. Had a narrow Adaptec 2940AU SCSI >card. All 7 available SCSI ID's were used. Only one HD was inside the >PC. Everything else was one device to one external box/PS. It was a >mess. Had one Seagate ST15150N 4G SCSI drive, several other 1G SSCI >drives, one 1G IDE drive. Tape drive or two. And a 1st generation Yamaha >CDR-100 4x recorder. Well, building kernel runned OK... But starting exmh from _IDE_ disk caused everything except starting exmh to stop temporarily. And 8 Mb buffer exhausted. 14 Mb buffer seems to be Ok for nearly anything (min FIFO was 8%). I _do_ know that SCSI is cool. I do know that IDE sucks. BTW, how do I check that DMA is on, and should it help _really_? My system is AMD K6-II/350, 64 Mb RAM/3 IDE disks [yes I know that sucks], FreeBSD actually uese only two, IDE 8x CD-ROM; 3.2-STABLE. Any program actively using disk I/O (starting exmh, find, make installworld) cause system to become VERY unresponcive. Alex. To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-hardware" in the body of the message
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