I've just switched our main server from kernel 2.4 to 2.6. Now I have more info displayed by iostat, and the numbers look strange: Device: tps Blk_read/s Blk_wrtn/s Blk_read Blk_wrtn md0 14,46 57,17 104,96 18050544 33136016 md2 71,53 145,46 519,37 45922192 163968648 md1 0,05 0,19 0,19 60592 58688 md0 is /, md1 swap and md2 /home. What I find strange is that the Blk_read for md0 is not negligible compared to md2; md0 only has bin, console, dev, etc, lib, proc, root, sbin, sys and usr. These should be read mostly soon after boot and afterwards the partition should have very small io. The whole / partition has only 2.4GB. Note also that Blk_wrtn for md0, though smaller than for md2, shows about 33GB, which is more than an order of magnitude more than the space used. And worse, it's bigger than Blk_read. There's surely something I'm missing here... - 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
