On Sat, 28 Jun 2003, Alex Verbitsky wrote: > What do you mean by this? I did not notice anything like this, though i > use it for sequental i/o mainly. if your i/o is highly random, then > 3ware acceleration (R5 fusion) is not working and you should receive > something like 5-10 MB/s. Which is exactly what we all get in real-life file server environment when using onboard RAID5 without a lot of onboard cache (though I have seen the same behaviour even on SX6000 with 128 meg ram). Filesystem read is phenomenally fast (I have seen 150 meg+ off of 8 disk arrays) but write is very slow (5-10 meg/s). Sequential write is also fast, but that never happens in a fileserver environment. Since I use my raid5 mainly for long time cheap storage I don't have a big problem with all this, stability and ease of management is what I'm looking for, so I choose hardware raid5 on 3w7500. -- Mikael Abrahamsson email: swmike@swm.pp.se - 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
