Date: Fri, 17 Oct 2008 13:50:38 +0200 From: Miroslav Lachman <000.fbsd@quip.cz> To: Jeremy Chadwick <koitsu@FreeBSD.org> Cc: Gavin Atkinson <gavin@FreeBSD.org>, freebsd-stable@FreeBSD.org Subject: Re: Recommendations for servers running SATA drives [hot-swap] Message-ID: <48F87C0E.8060404@quip.cz> In-Reply-To: <20081016202322.GA2429@icarus.home.lan> References: <20080927051413.GA42700@icarus.home.lan> <765067435.20080926223557@takeda.tk> <20080927064417.GA43638@icarus.home.lan> <Pine.OSX.4.64.0809271453550.4630@toasty.nat.fasttrackmonkey.com> <20080927202250.GA60980@icarus.home.lan> <48E0DB7E.20804@quip.cz> <1222699642.24339.12.camel@buffy.york.ac.uk> <48E0F36C.1080400@quip.cz> <20080929153220.GA11459@icarus.home.lan> <48F7964C.4060309@quip.cz> <20081016202322.GA2429@icarus.home.lan>
next in thread | previous in thread | raw e-mail | index | archive | help
This is a multi-part message in MIME format.
--------------060206040901040307060008
Content-Type: text/plain; charset=us-ascii; format=flowed
Content-Transfer-Encoding: 7bit
Jeremy Chadwick wrote:
> On Thu, Oct 16, 2008 at 09:30:20PM +0200, Miroslav Lachman wrote:
>
>>Today I was replacing disk in one Sun Fire X2100 M2 so I tried
>>hot-swapping. It was as you said: atacontrol detach ata3, replace the
>>HDD, atacontrol attach ata3 and new disk is in the system. I tried it 3
>>times to be sure that it was not coincidence - no panic was produced ;o)
>>So in this case, hot-swapping on Sun Fire X2100 M2 with FreeBSD 7.0 i386
>>works.
>
>
> That's excellent news. So it seems possibly the problem I was seeing
> was with "reinit" causing some sort of chaos. I'll have to check things
> on my testbox here at home to see how I caused the panic last time.
>
> Thanks for providing feedback, as usual! :-)
Unfortunately there is one problem - I see a lot of interrupts after
disk swapping (about 193k of atapci1)
Interrupts
197k total
ohci0 21
ehci0 22
193k atapci1 23
2001 cpu0: time
1 bge1 273
2001 cpu1: time
Full output of systat -vm 2 is attached.
It is shown in top as 50% interrupt (CPU state) and load 1 until I
rebooted the machine (I can provide MRTG graphs). The system was not in
production load, but almost idle. (I will put it in production tomorrow).
After reboot, everything is OK.
Can somebody test hot-swapping with SATA drives and confirm this
behavior? (I can't test it now, because machine is in datacenter)
Miroslav Lachman
--------------060206040901040307060008
Content-Type: text/plain;
name="systat_vm.txt"
Content-Transfer-Encoding: 7bit
Content-Disposition: inline;
filename="systat_vm.txt"
2 users Load 1.00 1.00 0.99 Oct 17 00:25
Mem:KB REAL VIRTUAL VN PAGER SWAP PAGER
Tot Share Tot Share Free in out in out
Act 40032 6212 118412 9352 509928 count
All 70200 7884 4370000 16700 pages
Proc: Interrupts
r p d s w Csw Trp Sys Int Sof Flt cow 197k total
3 45 387k 6 75 193k 187 zfod ohci0 21
ozfod ehci0 22
0.7%Sys 45.9%Intr 0.0%User 0.0%Nice 53.4%Idle %ozfod 193k atapci1 23
| | | | | | | | | | | daefr 2001 cpu0: time
+++++++++++++++++++++++ prcfr 1 bge1 273
10 dtbuf totfr 2001 cpu1: time
Namei Name-cache Dir-cache 68955 desvn react
Calls hits % hits % 58041 numvn pdwak
17234 frevn pdpgs
intrn
Disks ad4 ad6 191128 wire
KB/t 0.00 0.00 59664 act
tps 0 0 242588 inact
MB/s 0.00 0.00 46108 cache
%busy 0 0 463820 free
113488 buf
--------------060206040901040307060008--
Want to link to this message? Use this URL: <https://mail-archive.FreeBSD.org/cgi/mid.cgi?48F87C0E.8060404>