Date: Mon, 25 Oct 2004 18:12:24 +0200 From: fandino <fandino@ng.fadesa.es> To: freebsd-current@freebsd.org Subject: Re: FreeBSD 5.3b7and poor ata performance Message-ID: <417D25E8.6080804@ng.fadesa.es> In-Reply-To: <417CD6DD.7050801@DeepCore.dk> References: <14479.1098695558@critter.freebsd.dk> <417CD0CA.8010708@ng.fadesa.es> <417CD6DD.7050801@DeepCore.dk>
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Hello,
S=F8ren Schmidt wrote:
> Transfer rates:
> outside: 102400 kbytes in 1.933641 sec =3D 52957=20
> kbytes/sec
> middle: 102400 kbytes in 1.934147 sec =3D 52943=20
> kbytes/sec
> inside: 102400 kbytes in 2.761984 sec =3D 37075=20
> kbytes/sec
>=20
>=20
> Mind you this server is active as mail/www/gateway so the numbers are t=
o=20
> be taken with a bit of salt, and that Maxtor disk is probably the=20
> slowest disk they make at all these days, anyhow the numbers above fits=
=20
> the specs pretty close...
Thanks to the excelent job of Thomas Sparrevohn I get 52MB/s, this is
an excerpt of their comments:
"Changes the DMA speed to 66 - The Controller is a 100 controller and the=
disks
are 100 Disks but I think the default for the controller is 66 and hence
there are most likely a small initialisation difference between Linux, Ne=
tBSD
and FreeBSD"
# diskinfo -t ad5
ad5
=2E...
Transfer rates:
outside: 102400 kbytes in 1.897858 sec =3D 53956 kbytes/sec
middle: 102400 kbytes in 1.934135 sec =3D 52944 kbytes/sec
inside: 102400 kbytes in 2.735875 sec =3D 37429 kbytes/sec
Soren whilst that this solution doesn't makes sense it is fine to me :-)
Poul, now I'm using gstripe with two disks (52 MB/s by disk) and diskinfo=
reports a final throughput of 40MB/s. is it normal with gstripe?
# diskinfo -t /dev/stripe/test
/dev/stripe/test
=2E....
Transfer rates:
outside: 102400 kbytes in 2.529268 sec =3D 40486 kbytes/sec
middle: 102400 kbytes in 2.524635 sec =3D 40560 kbytes/sec
inside: 102400 kbytes in 2.524111 sec =3D 40569 kbytes/sec
# gstripe list
Geom name: test
State: UP
Status: Total=3D2, Online=3D2
Type: AUTOMATIC
Stripesize: 4096
ID: 3854451486
Providers:
1. Name: stripe/test
Mediasize: 82220277760 (77G)
Sectorsize: 512
Mode: r0w0e0
Consumers:
1. Name: ad5
Mediasize: 41110142976 (38G)
Sectorsize: 512
Mode: r0w0e0
Number: 0
2. Name: ad7
Mediasize: 41110142976 (38G)
Sectorsize: 512
Mode: r0w0e0
Number: 1
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