[OpenIndiana-discuss] Dell R510 SAS2 Backplane with SAS2008 (PERC H200)

[Grant Albitz]

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.



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From: Grant Albitz [GAlbitz at 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 [alubel at gmail.com]
Sent: Wednesday, January 11, 2012 1:00 AM
To: Discussion list for OpenIndiana
Cc: openindiana-discuss at 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 <galbitz at 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?
>
>
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> OpenIndiana-discuss mailing list
> OpenIndiana-discuss at openindiana.org
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