On Fri November 13 2009, Kristleifur Daðason wrote: > On Wed, Nov 11, 2009 at 6:51 PM, Thomas Fjellstrom <tfjellstrom@xxxxxxx> wrote: > > On Wed November 11 2009, Richard Scobie wrote: > > > Thomas Fjellstrom wrote: > > > > Thats the problem he was trying to get away from. the MV8 > > > > controller likes to offline disks when a few smart commands arrive. > > > > at least with the main kernel drivers. But then the main kernel > > > > mvsas drivers decide to give up if you even attempt to start a raid > > > > array on them. The controller locks up and you have to reboot. Most > > > > of the time a reboot even fails when it tries to sync the block > > > > devices, so a hard reset is in order. > > > > > > OK, I did not know the Marvell controller also has a problem with > > > smartmontools. > > > > Given the state of the in kernel drivers, its probably a driver issue. > > Thanks for the replies, all. > > I'll bet it's the driver - it doesn't feel quite right that a random > external command can easily drop drives off the controller, be it > smartmontools or mdadm. > > Thomas, I tried sending a private email to Andy Yan. I haven't got a > reply, which kind of isn't surprising in this world of spam. Can I ask > you for a referral - could you send him an email asking him if I can > have the patch and how to test it? He seems to be a busy guy, but I've CCed him on this. The actual driver I got is a full copy of the driver, builds out of tree. He hasn't said I can't send the package to anyone, but I'll wait a little while before doing so, he might pop up saying not to give it out. All I can say is: it works well enough for me*. For a $120 8 port sata card, it really does the trick. I was so glad when I didn't have to get several crappy 2-4 port jmicron cards. > Also, to list-dwellers: I'd greatly appreciate further tips on PCIe SAS > HBAs. > > Thanks! > -- > To unsubscribe from this list: send the line "unsubscribe linux-raid" in > the body of a message to majordomo@xxxxxxxxxxxxxxx > More majordomo info at http://vger.kernel.org/majordomo-info.html > * Performance (to me) is outstanding, or at least it will be once the write back stuff is fixed up, and the io controller stuff is also fixed up, but as is right now in 2.6.31, its "good enough". Might not get the absolute insane 400-500MB/s I saw with the controller originally, but I do get a good 100-230MB/s off my 5 drive md raid5 array (512KB chunk). I find things that used to take 30 seconds or more on my old array now happen in a few seconds. Right now writes are rather bad (60-100MB/s) but that I assume is the write back stuff, which should hopefully be fixed in 32. -- Thomas Fjellstrom tfjellstrom@xxxxxxx -- To unsubscribe from this list: send the line "unsubscribe linux-raid" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
