the 9240 controller had the exact same problem spinning up the drives so i am using the single r710 with 12 raid0's at the moment. i will likely stay with this, but i may benchmark the other way for kicks.
________________________________________ From: Rich [rerc...@acm.jhu.edu] Sent: Friday, January 13, 2012 10:00 AM To: Discussion list for OpenIndiana Subject: Re: [OpenIndiana-discuss] Dell R510 SAS2 Backplane with SAS2008 (PERC H200) Should do SATA 3 - I didn't think that SATA 3 speed for STP was an optional part of the SAS 2.0 spec. - Rich On Thu, Jan 12, 2012 at 10:27 PM, Grant Albitz <galb...@albitz.biz> wrote: > My reasoning behind the dual controller was simply that each controller has > 1gb of nvram cache and I figured the more the better =), I received my 9240 > today. It is a 6gbps card, yet it states it only supports sata 2 devices and > not sata3. I am going to try it anyways (I have 12 sas drives + 2 256gb > Samsung 830 ssds for read cache so I may take a performance hit on the > ssds.). At this point I plan on trying all possible configurations. If you > have a benchmark test you would like me to run against my setups please post > and I can humor you with the results. > > -----Original Message----- > From: Andy Lubel [mailto:alu...@gmail.com] > Sent: Thursday, January 12, 2012 6:35 PM > To: Discussion list for OpenIndiana > Cc: Discussion list for OpenIndiana > Subject: Re: [OpenIndiana-discuss] Dell R510 SAS2 Backplane with SAS2008 > (PERC H200) > > I would stick with single drive raid 0. I tried what you are talking about in > the distant past and it didn't work out so well with manageability or > performance. > > I know performance will be good, far better than wirespeed of a 1gbps for > nearline type workloads. If you want some file bench results of my raidz I > can put some together. > > Creating the raid0 doesn't lose any functionality that I am aware of. Using 2 > controllers may make sense if you were pure ssd, I don't see how 12 disks > could saturate a 6gbps multiport controller. > > On Jan 11, 2012, at 8:50, Grant Albitz <galb...@albitz.biz> wrote: > >> Also, >> >> As far as the drives go I have the same problem with different drives so I >> have to question if its really the drives. I was actually wondering if there >> is some sas command the h200 simply doesnt recognize. I suppose its also >> possible that the entire dell line of the sudo 7200rpm sas drives are >> lacking some SAS functionality as well. The lsi 9240-8i should be here >> tomorrow, i will let you guys know my findings with that. Please let me know >> your thoughts regarding raid 1 vs a bunch of raid 0s on the controller. >> >> >> >> ________________________________________ >> From: Grant Albitz [galb...@albitz.biz] >> Sent: Wednesday, January 11, 2012 8:43 AM >> To: Discussion list for OpenIndiana >> Subject: Re: [OpenIndiana-discuss] Dell R510 SAS2 Backplane with >> SAS2008 (PERC H200) >> >> i purchased an lsi controller card last night. if that does not work i have >> a h700 i can pull. I am curious about the following though: >> >> once you create a raid 0 dont you lose some inherent functionality of zfs? >> if that is the case would it make more sense for me to do the following: >> >> since my intent is to run the zfs equavilent of raid 10. could i just create >> a bunch of mirrors on a h700 and then use zfs to stripe them. i wouldnt >> expect too much of a penalty hit for the controller doing raid 1, and i >> would suspect a failed drive situation would be more straightforward and >> "normal" >> >> also i have very little experience with sas expanders. i actually have 2 >> h700s available to me. would it make sense to install both h700s into the >> system and run a single channel from each card to the backplane? in my case >> i would make 6 total raid 1 pairs, 3 on each controller and then stripe them >> with zfs. this would give me the additional 1gb of cahce. >> >> im just thinking out loud, i wasnt sure if you could connect 2 raid >> controllers to the dell backplane. i wasnt sure if the backplane was truly >> split for each channel or if somehow the controller saw all disks on both >> channels and was multipathing. >> >> >> ________________________________________ >> From: Andy Lubel [alu...@gmail.com] >> Sent: Wednesday, January 11, 2012 1:00 AM >> To: Discussion list for OpenIndiana >> Cc: openindiana-discuss@openindiana.org >> Subject: Re: [OpenIndiana-discuss] Dell R510 SAS2 Backplane with >> SAS2008 (PERC H200) >> >> Hat to go with h700. Works flawlessly. Had to make single drive raid 0 then >> create pool. I tried lsi and dell IT firmware to no avail so I assume it's >> the drives also since hooking any sata drive up did indeed work, just >> something about the sas drives (not really sas but they are called that). >> >> H700 you will be happy with performance probably not so happy with drive >> replacement outage though. No raidctl support and I hate MSM. >> >> On Jan 10, 2012, at 23:38, cryptz <galb...@albitz.biz> wrote: >> >>> how did you make out with this? i have the same configuration but my >>> system came with 2tb WD drives. Otherwise our configuration and >>> symptoms were the same. Did the h700 resolve this? Woudl an LSI 8 >>> port I card be prefered so that we can skip the raid 0 setup? >>> >>> >>> _______________________________________________ >>> OpenIndiana-discuss mailing list >>> OpenIndiana-discuss@openindiana.org >>> http://openindiana.org/mailman/listinfo/openindiana-discuss >> >> _______________________________________________ >> OpenIndiana-discuss mailing list >> OpenIndiana-discuss@openindiana.org >> http://openindiana.org/mailman/listinfo/openindiana-discuss >> _______________________________________________ >> OpenIndiana-discuss mailing list >> OpenIndiana-discuss@openindiana.org >> http://openindiana.org/mailman/listinfo/openindiana-discuss >> _______________________________________________ >> OpenIndiana-discuss mailing list >> OpenIndiana-discuss@openindiana.org >> http://openindiana.org/mailman/listinfo/openindiana-discuss > > _______________________________________________ > OpenIndiana-discuss mailing list > OpenIndiana-discuss@openindiana.org > http://openindiana.org/mailman/listinfo/openindiana-discuss > > _______________________________________________ > OpenIndiana-discuss mailing list > OpenIndiana-discuss@openindiana.org > http://openindiana.org/mailman/listinfo/openindiana-discuss _______________________________________________ OpenIndiana-discuss mailing list OpenIndiana-discuss@openindiana.org http://openindiana.org/mailman/listinfo/openindiana-discuss _______________________________________________ OpenIndiana-discuss mailing list OpenIndiana-discuss@openindiana.org http://openindiana.org/mailman/listinfo/openindiana-discuss
