Neil And RAIDers, I have been looking for "what changes are made to fix/improve the parallel access(?) to disks simultanously?". I noticed as follow; Up to Linux2.4.9 it got the same performance for RAID0(2-way stripe) and a single disk(JBOD), about 15 MB/sec with DMA on(hdparm -tT /dev/mdx). On Linux 2.4.10 it improves to about 25 MB/sec for RAID0, 15 MB/sec for single disk. On Linux 2.4.18 it got the right performance; about 31 MB/sec for RAID0. I tried to port the difference on /driver/ide and /drivers/md, but it did not help. I think there were changes on other functions to fix the parallel access(?) to disks simultanously OR to improve the RAID0 performance . Why am I doing this kind of homework? I can not migrate our linux to 2.4.18 so I want to port ONLY the fixes for this performance issue. I use Linux2.4.5. Please help me if you know how I can work around. Thanks in advance, Bo - To unsubscribe from this list: send the line "unsubscribe linux-raid" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
