https://bugzilla.kernel.org/show_bug.cgi?id=15688 --- Comment #6 from Brian Sullivan <bexamous@xxxxxxxxx> 2010-04-10 16:57:26 --- BTW, I did not look into this as much, but using 3.xx there also seemed to be a limit of ~600MB/sec between controller & expander. If I put two arrays on the expander, each array by itself would do almost 500MB/sec in reads, but together they couldn't break 600MB/sec. I didn't really look into this further, maybe I was doing something wrong. ~600MB/sec, however, seems like exactly 1/2 the bandwidth of the minisas cable between controlller & expander. On Sat, Apr 10, 2010 at 5:00 AM, <bugzilla-daemon@xxxxxxxxxxxxxxxxxxx>wrote: > https://bugzilla.kernel.org/show_bug.cgi?id=15688 > > > > > > --- Comment #5 from dujun@xxxxxxxxxxxxx 2010-04-10 12:00:53 --- > Hi Andrew & Kashyap, > > It seems to me that the 4.22.00.00 driver from lsi is much faster than > kernel > 3.xx version driver. We have 16 WD SATA disks connected through lsi sas > expander to 1068e hba and linux md raid5 using these disks. The system has > only > one quad-core E5405 CPU. With the new lsi driver, we get sequential dd > read > performance up to 795MB/s and write performance up to 395MB/s which is > almost > twice as the kernel 3.xx driver. > > We will investigate different hardware setup further and let u know as soon > as > possible. > > Johnson > > -- > Configure bugmail: https://bugzilla.kernel.org/userprefs.cgi?tab=email > ------- You are receiving this mail because: ------- > You reported the bug. > -- Configure bugmail: https://bugzilla.kernel.org/userprefs.cgi?tab=email ------- You are receiving this mail because: ------- You are watching the assignee of the bug. -- 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
