Date: Sun, 23 Jul 2006 11:27:51 -0500 From: "Nikolas Britton" <nikolas.britton@gmail.com> To: "Jonathan Horne" <jhorne@dfwlp.org> Cc: freebsd-questions@freebsd.org Subject: Re: Slow Write Performance on 3ware controller Message-ID: <ef10de9a0607230927i3c84c7eg75093c034dab6eed@mail.gmail.com> In-Reply-To: <200607231053.58927.jhorne@dfwlp.org> References: <44C26B7A.30200@firebadger.net> <ef10de9a0607230347k303d07fw36b4a37bbf4a794a@mail.gmail.com> <44C357CA.4040801@firebadger.net> <200607231053.58927.jhorne@dfwlp.org>
next in thread | previous in thread | raw e-mail | index | archive | help
On 7/23/06, Jonathan Horne <jhorne@dfwlp.org> wrote: > 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. IBM Deathstars, not so fond memories of those drives. Here's another diskinfo from an 8 disk Maxtor 7L250S0 array connected to a HighPoint 2220, It's days away from being decommissioned and then rebuilt into a backup array for the new one taking it's place (Areca ARC-1220 + 8 Maxtor 7V300F0s): > diskinfo -t /dev/da0 /dev/da0 512 # sectorsize 1756440297472 # mediasize in bytes (1.6T) 3430547456 # mediasize in sectors 213541 # Cylinders according to firmware. 255 # Heads according to firmware. 63 # Sectors according to firmware. Seek times: Full stroke: 250 iter in 4.068691 sec = 16.275 msec Half stroke: 250 iter in 3.614864 sec = 14.459 msec Quarter stroke: 500 iter in 6.100577 sec = 12.201 msec Short forward: 400 iter in 2.314725 sec = 5.787 msec Short backward: 400 iter in 2.492332 sec = 6.231 msec Seq outer: 2048 iter in 0.251374 sec = 0.123 msec Seq inner: 2048 iter in 0.299685 sec = 0.146 msec Transfer rates: outside: 102400 kbytes in 0.712265 sec = 143767 kbytes/sec middle: 102400 kbytes in 0.698637 sec = 146571 kbytes/sec inside: 102400 kbytes in 0.690232 sec = 148356 kbytes/sec -- BSD Podcasts @: http://bsdtalk.blogspot.com/ http://freebsdforall.blogspot.com/
Want to link to this message? Use this URL: <https://mail-archive.FreeBSD.org/cgi/mid.cgi?ef10de9a0607230927i3c84c7eg75093c034dab6eed>