On Mon, Jan 28, 2008 at 07:13:30AM +1100, Neil Brown wrote: > On Sunday January 27, keld@xxxxxxxx wrote: > > Hi > > > > I have tried to make a striping raid out of my new 4 x 1 TB > > SATA-2 disks. I tried raid10,f2 in several ways: > > > > 1: md0 = raid10,f2 of sda1+sdb1, md1= raid10,f2 of sdc1+sdd1, md2 = raid0 > > of md0+md1 > > > > 2: md0 = raid0 of sda1+sdb1, md1= raid0 of sdc1+sdd1, md2 = raid01,f2 > > of md0+md1 > > > > 3: md0 = raid10,f2 of sda1+sdb1, md1= raid10,f2 of sdc1+sdd1, chunksize of > > md0 =md1 =128 KB, md2 = raid0 of md0+md1 chunksize = 256 KB > > > > 4: md0 = raid0 of sda1+sdb1, md1= raid0 of sdc1+sdd1, chunksize > > of md0 = md1 = 128 KB, md2 = raid01,f2 of md0+md1 chunksize = 256 KB > > > > 5: md0= raid10,f4 of sda1+sdb1+sdc1+sdd1 > > Try > 6: md0 = raid10,f2 of sda1+sdb1+sdc1+sdd1 That I already tried, (and I wrongly stated that I used f4 in stead of f2). I had two times a thruput of about 300 MB/s but since then I could not reproduce the behaviour. Are there errors on this that has been corrected in newer kernels? > Also try raid10,o2 with a largeish chunksize (256KB is probably big > enough). I tried that too, but my mdadm did not allow me to use the o flag. My kernel is 2.6.12 and mdadm is v1.12.0 - 14 June 2005. can I upgrade the mdadm alone to a newer version, and then which is recommendable? best regards keld - 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
