On Mon, Jan 16, 2012 at 1:12 PM, keith <ke...@scott-land.net> wrote: > I built a storage server to run the Bacula storage daemon on. B My plan was > to boot of a usb key then to use the four 2TB sata disks that are in the > server as a softraid raid 5 volume. The server in question is a dell > poweredge R310, i3 CPU 540 @ 3.07GHz with OBSD 5.0 amd64. > > I put the OS onto the usb key but the softraid 5 volume seemed realy slow. > Sftping files over the local network to the servers softraid volume was > taking ages. So as I was short of time I just rebuilt the server installing > OBSD into one of the sata disks wd0 > > Later I connect to the server and made a raid5 volume on the remaining three > disks but the speed was really slow to I tried a raid1 on two of the disks > and that works fine speed wise. > > I've tried to get some stats to figure out what's going on > > raid 5 (wd1, wd2,wd3) Time for newfs command to complete = 1 min 14 secs > raid 5 (wd1, wd2,wd3) Time to copy 2.3G file from wd0 onto the softraid5 > disk = 5 mins ish > > raid 1 (wd1, wd2) = 1.8TB B Time for newfs command to complete = 4 secs > raid 1 (wd1, wd2) copy 2.3G Time to copy 2.3G file from wd0 onto softraid > disk = 25 secs > > As this point I though I'd try raid0 but the server went and hung for some > reason. > > #bioctl -d sd0 > #bioctl -c 0 -l B /dev/wd2a,/dev/wd3a softraid0 < It hung on this command.... > Won't know what happed till I get to the datacenter. > > Idealy I wanted one large disk but if can't get a quick raid5 working I will > just use two softraid raid 1 disks and work around it. Does anyone have any > suggestions B ?
If you are concerned about a speed then RAID5 (or similar) is (and will not be) not a good choice with any filesystem http://constantin.glez.de/blog/2010/01/home-server-raid-greed-and-why-mirrori ng-still-best > > Thanks > Keith
