Date: Sun, 23 Jul 2006 17:27:10 -0400 From: Mike Tancsa <mike@sentex.net> To: questions@freebsd.org Subject: Re: Slow Write Performance on 3ware controller Message-ID: <5ih7c29tikhncmg1tmbpku6iv9df80dn8i@4ax.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>
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On Sun, 23 Jul 2006 10:53:58 -0500, in sentex.lists.freebsd.questions
you wrote:
>
>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.
Here is an areca 4 port PCIe in RAID 1+0
diskinfo -t da0
da0
512 # sectorsize
239999647744 # mediasize in bytes (224G)
468749312 # mediasize in sectors
29178 # Cylinders according to firmware.
255 # Heads according to firmware.
63 # Sectors according to firmware.
Seek times:
Full stroke: 250 iter in 1.328484 sec = 5.314 msec
Half stroke: 250 iter in 1.342900 sec = 5.372 msec
Quarter stroke: 500 iter in 2.021294 sec = 4.043 msec
Short forward: 400 iter in 0.817074 sec = 2.043 msec
Short backward: 400 iter in 1.972321 sec = 4.931 msec
Seq outer: 2048 iter in 0.237593 sec = 0.116 msec
Seq inner: 2048 iter in 0.204264 sec = 0.100 msec
Transfer rates:
outside: 102400 kbytes in 0.886375 sec = 115527
kbytes/sec
middle: 102400 kbytes in 1.106318 sec = 92559
kbytes/sec
inside: 102400 kbytes in 1.806561 sec = 56682
kbytes/sec
Seagate ST3120827AS
And an old 7810 in RAID5 with ST3500630As
diskinfo -t twed1
twed1
512 # sectorsize
1500320366592 # mediasize in bytes (1.4T)
2930313216 # mediasize in sectors
182403 # Cylinders according to firmware.
255 # Heads according to firmware.
63 # Sectors according to firmware.
Seek times:
Full stroke: 250 iter in 4.408301 sec = 17.633 msec
Half stroke: 250 iter in 4.335265 sec = 17.341 msec
Quarter stroke: 500 iter in 6.919564 sec = 13.839 msec
Short forward: 400 iter in 2.318452 sec = 5.796 msec
Short backward: 400 iter in 2.268990 sec = 5.672 msec
Seq outer: 2048 iter in 0.537223 sec = 0.262 msec
Seq inner: 2048 iter in 0.557811 sec = 0.272 msec
Transfer rates:
outside: 102400 kbytes in 1.708543 sec = 59934
kbytes/sec
middle: 102400 kbytes in 1.717575 sec = 59619
kbytes/sec
inside: 102400 kbytes in 1.615723 sec = 63377
kbytes/sec
--------------------------------------------------------
Mike Tancsa, Sentex communications http://www.sentex.net
Providing Internet Access since 1994
mike@sentex.net, (http://www.tancsa.com)
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