Date: 26 Jul 1998 21:00:35 +0200 From: Peter Mutsaers <plm@xs4all.nl> To: freebsd-current@FreeBSD.ORG Subject: UDMA works very nicely in -current Message-ID: <87u344e8to.fsf@muon.xs4all.nl>
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The following message is a courtesy copy of an article that has been posted to comp.unix.bsd.freebsd.misc as well. Hello, I just wanted to report that I'm very pleased with -current. I have a Pentium motherboard with some weird chipset, and still UDMA is working very nicely. Linux 2.0 and 2.1 b.t.w. could not recognize my IDE controller and thus couldn't activate UDMA, which gave a huge negative difference w.r.t. disk I/O performance (measured with bonnie). Heh, often people say that FreeBSD supports less hardware, but sometimes it is vice versa, and FreeBSD supports what I need much better. I always bought SCSI disks (fast SCSI-2, Ultra SCSI is too expensive for my home machine), spending about twice as much as on IDE disks. But now it turns out that UDMA (5400 rpm Maxtor disk) clearly outperforms my fastest (7200 rpm) SCSI disk (Ultra and/or wide SCSI will still win probably), measured again with bonnie. The IDE disk can read 12 MB/s on a filesystem. Amazing, that's faster than even the theoretical limit (10MB/s) for fast-SCSI-2. CPU load (on a 200MMX) only 25% while doing this. FreeBSD's core team is doing great work; alas they get much less attention of the media than they deserve (like the Linux developers get). I just came back from using Redhat Linux (several new and stable kernels) and clearly a FreeBSD feels snappier and is easier to control. -- /\_/\ ( o.o ) Peter Mutsaers | Abcoude (Utrecht), | Trust me, I know ) ^ ( plm@xs4all.nl | the Netherlands | what I'm doing. To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-current" in the body of the message
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