Date: Fri, 28 Feb 2014 11:32:03 +0100 From: Borja Marcos <borjam@sarenet.es> To: "Steven Hartland" <killing@multiplay.co.uk> Cc: freebsd-scsi@freebsd.org Subject: Re: ServeRAID M5210e passthroughand syspd corruption Message-ID: <C8396C8A-0500-4626-886B-5C83A733DA82@sarenet.es> In-Reply-To: <0B1A8780A28942B78E8FA4E3CE5EAE3E@multiplay.co.uk> References: <E8F5E131-F51D-448A-9035-646FEFF686F3@sarenet.es> <0B1A8780A28942B78E8FA4E3CE5EAE3E@multiplay.co.uk>
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On Feb 28, 2014, at 11:17 AM, Steven Hartland wrote: > mfi is a raid card it doesn't really have a true passthrough mfisyspd = is > the best you'll get. I'd recommend you switch to an HBA card which = uses > mps driver instead. I know, unfortunately this brain dead (unless proven otherwise) IBM = machine doesn't seem to allow me to use a proper HBA. That said, since I asked for assistance in 2007 and Scott Long explained = how to turn an aac card into a passthrough device I have machines running like a charm. I am sure I can trust ZFS to = detect any problems due to that setup. > When you said you're seeing mfisyspd corruption what specifically are > you seeing? I described some of the problems several days ago, in short, either = using ZFS or UFS on one of those "mfisyspd" devices or a "da" created by = allowing passthrough to work and running a benchmark, I get data corruption. No = data corruption happens if I create a "raid 0" device on one disk.=20 I've tried with Samsung and OCZ SSDs and, just wondering if it might be = a SSD specific problem of some sort, a Seagate disk. No luck. With so many manufacturers (even Sun!) tending including these = controllers on their motherboards, and even refusing to sell alternative = options (who wants a "software RAID" when you can get "a hardware one", = they say) I think that it would be good to make sure that passthrough = mode is supported in the best possible way. Maybe we could lobby the LSI Overlords, the manufacturers, both, or just = try to make the best possible use of the most commonly found hardware. Borja.
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