Date: Sun, 23 Jul 2006 10:53:58 -0500 From: Jonathan Horne <jhorne@dfwlp.org> To: freebsd-questions@freebsd.org Subject: Re: Slow Write Performance on 3ware controller Message-ID: <200607231053.58927.jhorne@dfwlp.org> In-Reply-To: <44C357CA.4040801@firebadger.net> References: <44C26B7A.30200@firebadger.net> <ef10de9a0607230347k303d07fw36b4a37bbf4a794a@mail.gmail.com> <44C357CA.4040801@firebadger.net>
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On Sunday 23 July 2006 06:04, Richard Collyer wrote:
> Nikolas Britton wrote:
> >> Would moving the top card to the bottom slot and putting the 9500S-12 in
> >> the top slot screw with FreeBSD in anyway or will it just accept the
> >> changes and keep on going?
> >
> > I don't see any problem doing that... FreeBSD would only care if it
> > was the boot drive AND if it also changed the device name in /dev. So
> > yes... try it... if it changes the /dev name just edit /etc/fstab with
> > the new settings.
>
> Oh yes, had fun with fstab in single user mode yesterday ... I'd put a
> spelling mistake in /etc/fstab that was fun as it was my first venture
> into single user mode. Took me 20 mins to realise that only / was
> mounted and that /use wasn't hence no editors or shells.
>
> As this is a production server (its only my home file server) and the
> card was an ebay special at sub $200 I'm happy with the performance.
>
> I may play around with moving them when some more routine maintenance
> comes up but as I am only writing to it over the 100Mbit network
> 50MB/sec is more than enough for what I am looking at.
>
> Many thanks for the help.
>
> Cheers
> Richard
>
all this 3ware discussion inspired me to check out my 6.1-releng server and
see how its 3ware card stacks up to the previously posted scores.
[root@zeus ~]# diskinfo -t /dev/twed2
/dev/twed2
512 # sectorsize
360099151872 # mediasize in bytes (335G)
703318656 # mediasize in sectors
43779 # Cylinders according to firmware.
255 # Heads according to firmware.
63 # Sectors according to firmware.
Seek times:
Full stroke: 250 iter in 5.702448 sec = 22.810 msec
Half stroke: 250 iter in 3.484361 sec = 13.937 msec
Quarter stroke: 500 iter in 5.728894 sec = 11.458 msec
Short forward: 400 iter in 2.178793 sec = 5.447 msec
Short backward: 400 iter in 3.040917 sec = 7.602 msec
Seq outer: 2048 iter in 0.502034 sec = 0.245 msec
Seq inner: 2048 iter in 0.521798 sec = 0.255 msec
Transfer rates:
outside: 102400 kbytes in 2.872447 sec = 35649 kbytes/sec
middle: 102400 kbytes in 2.996709 sec = 34171 kbytes/sec
inside: 102400 kbytes in 2.341439 sec = 43734 kbytes/sec
ive been a 3ware fan for many years now. this pic was taken in 2001...
http://www.dfwlp.org/~jhorne/pics/computerroom/raid01.jpg
heh, you want to talk about pci placement based on fit of ide cables... lol
try mine. in the end, after 5 years, im impressed mine is still chugging
away, at albeit the performance numbers of yesteryear. oh, incase anyone
would ask, my /dev/twed2 is a 4x120GB RRAID5 with seagate's (ST3120026A), in
a dual 1ghz thats almost as old as the card.
i would love to go out and buy a new 3ware... but this one wont die! :)
an btw to richard (and other 3ware users too), do you have the sysutils/tw_cli
port installed? very useful!
cheers,
jonathan
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