Hi Kevin, Kevin wrote: > On 8/21/06, Robert Urban <[EMAIL PROTECTED]> wrote: > > using a simple test program to write sequential blocks to a file, optionally > > opening with O_SYNC, I've tested write performance to a MegaRAID logical > > drive . . . > > > > All tests performed with O_SYNC, to avoid bufcache interaction. > > > > The performance, at least to my perhaps naive eyes, seems abysmal. > > I'm getting 1.2MB/sec on the RAID-5 logical drive. > > Have you tried your test on any other controller?
no. I could run them on the onboard Smart Array 5i controller. I will try to get some results for this controller, maybe tomorrow. > Do you have bonnie++ results for this controller? No, but I've just copied the sources :) Will post. In order to get a "baseline", I could plug in an AHA-3960D (dual channel U160) and connect a disk to it, just to see what the disk can do with no raid controller in between... > I have a pair of Dell 2850 servers with PERC 4e/Di, > if these are similar enough I can run tests (RAID0 and RAID1). with cache battery back up? Rob Urban
