Date: Sun, 04 Jun 2006 18:21:09 +0200 From: Pavel Duda <element@email.cz> To: freebsd-questions@freebsd.org Subject: Re: FreeBSD and newer HDD problems ? Message-ID: <e5v19m$pcj$1@sea.gmane.org> In-Reply-To: <e5v0v9$oqn$1@sea.gmane.org> References: <e5v0v9$oqn$1@sea.gmane.org>
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Pavel Duda wrote: > Hello, > I've recently bought new big HDD (WDC RE, 320GB) and it looks like > FreeBSD has some troubles with it when trying to transfer files over > network. > > If I try to perform some "synthetic" test like 'dd if=/dev/zero > of=/wdc320/testfile' then I get some decent speeds about 40MB/s. When I > try to copy some big files from my older disk (IBM 40GB) I still have > write about 25-27MB/s. > > Problem comes when I try to copy something to disk over network (tried > samba, ftp) disk write speed is very low - about 5-6MB/s at max. > When testing this issue I've start 'systat -vmstat 1' and noticed that > my new disk is very busy (60-100%) and speed (MB/s) jumps up and down. > If I write files with 'dd' or transfer them from disk 2 disk then write > speed and disk load is almost constant (about 60%). When transfering > files over network to old HDD then disk load is low (40-50%) and speed > is constant (8-9MB/s). > > To be sure that disk it is not some kind of disk problem I've installed > Debian 3.1r2 with same version of samba and I get 9-11MB/s transfer > speeds (in both directions) !! > > Also it doesn't matter if I use transfer data over gigabit card or > 100mbit card. Results are similar. FreeBSD is in avarage very very slow > (3MB) while Debian works fine (10MB). Because my server is primarily > used for transfer files (Samba + PDC) it is crucial for me to have > highest transfer speeds possible and I'd like to stick with FreeBSD :-/. > > Does someone has any idea what could be wrong or how could I determine > what causes this problem ? > > Thanks for any advice. > Pavel > > _______________________________________________ > freebsd-questions@freebsd.org mailing list > http://lists.freebsd.org/mailman/listinfo/freebsd-questions > To unsubscribe, send any mail to > "freebsd-questions-unsubscribe@freebsd.org" > I've forgot to add that system is FreeBSD 6.0 (no custom kernel), P4 1.8GHz, 384MB RAM, Realtek gigabit NIC (8169), Intel EE NIC 10/100mbit.
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