Date: Mon, 8 Dec 2003 00:50:04 -0500 From: Garance A Drosihn <drosih@rpi.edu> To: JacobRhoden <jrhoden@unimelb.edu.au>, freebsd-questions@freebsd.org Subject: Re: Why would drive run at UDMA33? (Segate 80GB) Message-ID: <p06002035bbf9c0fd9db2@[128.113.24.47]> In-Reply-To: <200312081621.52572.jrhoden@unimelb.edu.au> References: <200312081621.52572.jrhoden@unimelb.edu.au>
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At 4:21 PM +1100 12/8/03, JacobRhoden wrote: >Hi, > >I have just purchased a new 80GB drive, howerver i noticed it is running >significantly slower than my current 80gb drive. > >Dmesg says this: > ad0: 76319MB <ST380021A> [155061/16/63] at ata0-master UDMA100 > ad2: 76319MB <ST380011A> [155061/16/63] at ata1-master UDMA33 > >Why is one running at udma100 and my new one running at >udma33? iosys reports it as 4 times slower! Is there any >special tuning or kernel option i need to set? This may not be useful for you, but I hit a problem like this at one time. In my case, it turned out that the ATA cable was hooked up backwards. By that I mean that the "motherboard" end was connected to the hard disk, and the "master disk" end was connected to the motherboard. It worked, but ran at the slower speed. -- Garance Alistair Drosehn = gad@gilead.netel.rpi.edu Senior Systems Programmer or gad@freebsd.org Rensselaer Polytechnic Institute or drosih@rpi.edu
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