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
