SATA problems
Rohan Kulkarni
rohan.ak1 at gmail.com
Fri Jul 6 14:24:52 UTC 2007
On 7/5/07, John Wendel <john.wendel at metnet.navy.mil> wrote:
>
> Rohan Kulkarni wrote:
> > Hello,
> > So will it help if I have a faster processor or I add in more
> > RAM to my system?
> >
> > On 7/3/07, *John Wendel* < john.wendel at metnet.navy.mil
> > <mailto:john.wendel at metnet.navy.mil>> wrote:
> >
> > Rohan Kulkarni wrote:
> > >
> > >
> > > On 7/3/07, *Rohan Kulkarni* < rohan.ak1 at gmail.com
> > <mailto:rohan.ak1 at gmail.com>
> > > <mailto:rohan.ak1 at gmail.com <mailto:rohan.ak1 at gmail.com>>> wrote:
> > >
> > >
> > >
> > > On 7/2/07, *John Wendel* < john.wendel at metnet.navy.mil
> > <mailto:john.wendel at metnet.navy.mil>
> > > <mailto:john.wendel at metnet.navy.mil
> > <mailto:john.wendel at metnet.navy.mil>>> wrote:
> > >
> > > Rohan Kulkarni wrote:
> > > >
> > > >
> > > > On 7/2/07, *Tim* <ignored_mailbox at yahoo.com.au
> > <mailto:ignored_mailbox at yahoo.com.au>
> > > <mailto: ignored_mailbox at yahoo.com.au
> > <mailto:ignored_mailbox at yahoo.com.au>>
> > > > <mailto:ignored_mailbox at yahoo.com.au
> > <mailto:ignored_mailbox at yahoo.com.au>
> > > <mailto: ignored_mailbox at yahoo.com.au
> > <mailto:ignored_mailbox at 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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> > > > fedora-list at redhat.com
> > <mailto:fedora-list at redhat.com> <mailto: fedora-list at redhat.com
> > <mailto:fedora-list at redhat.com>>
> > > <mailto: fedora-list at redhat.com
> > <mailto:fedora-list at redhat.com> <mailto:fedora-list at redhat.com
> > <mailto:fedora-list at redhat.com>>>
> > > > To unsubscribe:
> > > https://www.redhat.com/mailman/listinfo/fedora-list
> > > > <
> https://www.redhat.com/mailman/listinfo/fedora-list>
> > > >
> > > >
> > >
> > > 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?
> > >
> > > Regards,
> > >
> > > John
> > >
> > >
> > >
> > > Hello,
> > > 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
>
> > > Thanks...
> >
> > >
> > >
> > >
> > > Can anyone please help me...do i need to update to the
> latest
> > > kernel??or do i need
> > > to download some drivers.
> > >
> > > --
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> > <mailto:fedora-list at redhat.com <mailto:fedora-list at redhat.com>>
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> > > <https://www.redhat.com/mailman/listinfo/fedora-list>
> > >
> > >
> > >
> >
> > You don't really have a problem!
> >
> > Don't confuse the maximum interface transfer speed (150 MB/s) with
> > your disk transfer speed (approx 40-50 MB/s).
> >
> > When you copy a file, you read the old file, and then you write the
> > new file, rinse and repeat until done. So your transfer speed is
> going
> > to be approximately 1/2 to disk speed. And now you need to add in
> the
> > operating system overhead, allocating blocks for the new file, and
> all
> > the seek time, moving the disk heads between the old file blocks and
> > the new file blocks.
> >
> > 15 MB/s seems reasonable. On my box, using a single drive, I get a
> > write speed of 30 MB/s for a 3 GB file and a copy speed of 14 MB/s.
> >
> > Need more speed, get more disks and a raid controller.
> >
> > Regards,
> >
> > John
>
> Faster processor can help lots of things, but not disk speed. More
> memory (usually) helps, the kernel can use it for disk cache if
> nothing else.
>
> Anybody else out there got any advice for speeding up SATA drives ?
>
> Regards,
>
> John
Hello,
My SATA drive provides me a copy speed of only 15MB/s while one of
my friends using
opensuse 10.2 with an Intel P4 and a Seagate SATA 80GB HDD gets
almost double the
copy speed.I use Fedora 7.Why is there such a large speed
difference?
Thank you
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