Op Wednesday 28 May 2008 17:44:50 schreef Moore, Eric: > On Wednesday, May 28, 2008 8:18 AM, Maarten Vanraes wrote: > > So in effect, you are telling me that we bought fakeraid > > cards... since this > > is the "recommended driver"? is the card a hardware raid? or software. > > > > We had specifically asked for hardware raid... :-( > > I worked on megaraid team some five years ago, now I work on mpt fusion. > I can't tell you what the recommended megaraid cards, as they have > changed since then from U320. The mpt fusion cards come with Raid > levels 0, 1, and 1 enhanced, which is implemented in hardware/firmware. > > > You could try looking here: > http://www.lsi.com/storage_home/products_home/internal_raid/index.html i think it's this one: http://www.lsi.com/storage_home/products_home/internal_raid/megaraid_sas/megaraid_sas_8208elp/index.html in any case: LSI support site directs me to the megasr driver for my card. But there is something wrong in either case: on machine 2: i did an rsync from machine A array 2 to machine B array 2 (SATA disks of 1T in raid 1): speed is around 20MB/s probably due to load on machine A, or whatever (machine B has nothing running whatsoever.) hdparm -tT /dev/sdb shows between 50 and 80MB/s the moment i do an scp or rsync from something else, the first rsync drops immediately to around 5MB/s, while the second doesn't do more than 5MB/s (often one would show around 2MB/s.) at that time, the iowait (dual quad core) is above 90% ... Since both identical machines behave in the same matter, i believe there is something seriously wrong with the megasr driver in the first place, and tried to get support, but they request me to supply a serial number of the card. (Both machines are already running in a colocation room). I had to patch it to work with 2.6.21, i'm wondering if i did anything stupid in the patch. can you check that maybe? (it's a small patch) on the other hand, if there is an driver that works well, but just needs a little work, i'll be happy to test this out. I'm just not a kernel devel, and don't really know how to solve this. the problem is just that i want to be helped one way or another. IF in your opinion the cards are not the best solution and i would have to upgrade it, i can do that; but i suspect the megasr driver. am i wrong in my thinking? Sincerely, Maarten -- To unsubscribe from this list: send the line "unsubscribe linux-scsi" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
