Why would drive run at UDMA33? (Segate 80GB)

[Jarrod]

Try 'man atacontrol'

Jarrod
admin at say-10.net


On Mon, 8 Dec 2003 16:21:52 +1100
JacobRhoden <jrhoden at unimelb.edu.au> 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?
> 
> The segate website reports the following details aobut it:
>   Model Number:ST380011A
>   Capacity:80 GB
>   Speed:7200 rpm
>   Seek time:8.5 ms avg
>   Interface:Ultra ATA/100
> 
> 
> Jacob Rhoden            Phone: +61 3 8344 4478
> ITS Division            Email: jrhoden at unimelb.edu.au
> Melbourne University   Mobile: +61 403 788 386
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