Just quick searching around: "Using a LSISAS 1068E I/O processor with Fusion-MPT (Message Passing Technology) for optimum RAID performance and a PCI Express host interface for increased bandwidth, these UIO internal RAID adapters deliver an intelligent and robust RAID solution." http://www.lsi.com/storage_home/products_home/standard_product_ics/sas_ics/lsisas1068e/index.html I am not sure if iozone was used correctly here: storrgie@ALEXANDRIA:/mnt/ARRAY$ iozone -s 4096 Run began: Mon Nov 2 18:02:41 2009 File size set to 4096 KB Command line used: iozone -s 4096 Output is in Kbytes/sec Time Resolution = 0.000001 seconds. Processor cache size set to 1024 Kbytes. Processor cache line size set to 32 bytes. File stride size set to 17 * record size. random random bkwd record stride KB reclen write rewrite read reread read write read rewrite read fwrite frewrite fread freread 4096 4 670491 1309061 2432098 2163764 2205712 1148325 2123381 1300736 2214241 647788 1131832 2419425 2079181 I did not set any of the file system settings when creating my array's file system, I simply did a mkfs.ext4 on the device. This leads me to believe that I lost some of the performance due to my laziness. Richard Scobie wrote: > Andrew Dunn wrote: > >> My original array was a raid6 of 9 WD caviar black drives, the chunk >> size was 64k. I use USAS-AOC-L8i controllers to address all of my drives >> and the TLER setting on the drives is enabled for 7 seconds. > >> I have noticed slow rebuilding time when I first created the array and >> intermittent lockups while writing large data sets. > > Does the USAS-AOC-L8i use a Marvell controller? > > If so, someone was posting here recently that they have problems with > it locking up under md RAID loads. Have a look over the past couple of > months archives. > > Regards, > > Richard -- Andrew Dunn http://agdunn.net -- 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
