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Re: SATA problems

On 7/2/07, John Wendel <john wendel metnet navy mil> wrote:
Rohan Kulkarni wrote:
> On 7/2/07, *Tim* <ignored_mailbox yahoo com au
> <mailto:ignored_mailbox yahoo com au >> wrote:
>     On Mon, 2007-07-02 at 19:14 +0530, Rohan Kulkarni wrote:
>      > My motherboard supports hard disk speed of 150MB/s but i get only
>      > 15MB/s speed
>     Have you double-checked that the figures you're reading at are bits per
>     second or bytes per second?
>     --
>     (This box runs FC5, my others run FC4 & FC6, in case that's
>     important to the thread.)
>     Don't send private replies to my address, the mailbox is ignored.
>     I read messages from the public lists.
> Hello,
>            Yes I have checked with the motherboard specifications.It
> says that it supports
>            a speed of 150MB/s.It is bytes for second.Though my hard disk
> supports native command queing my motherboard does not support it.
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It doesn't matter what speed your motherboard (SATA controller)
supports if the disk speed is slower. What brand/model of disk do you
have? What kernel version? How are you measuring the disk speed?



         I have a Seagate ST3160211AS.It is a Barracuda 160GB hard disk with a
         speed of 7200RPM.It supports upto 300MB/s with Native Command Queing.I checked the average  speed of copying by copying a
         3GB file from one FAT32 partition to another.I got a average speed of around
         15MB/s.I have the kernel 2.6.21-1.3228.fc7

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