On 20 February 2012 03:04, Al Thompson <althompson58@xxxxxxxxx> wrote: > I'm curious about about much doing RAID in software may impact CPU load > and overall system overhead. There's an impact but less than most people expect to see. If you really insist, you need to have a good (at least RAID-1 supporting) card but you must avoid any fakeraid implementations (where the real work is still done by CPU but it is not that easy to migrate, I haven't used one for a decade but they're still around - the first ever SATA interface card I got had a fakeraid implementation). Mirroring via mdadm is usually good enough. If you want to try, just plug a 2nd disk and build an array, it's always possible to (carefully) dismantle the array later and go back to single disks. Day job mainly involves around high performance OLTP databases, we never use software raid since the servers we use always have decent SAS interfaces with good RAID support. Use of software RAID rarely comes up but sometimes it does and we lose about 1-2% performance overall. _______________________________________________ Linux-audio-user mailing list Linux-audio-user@xxxxxxxxxxxxxxxxxxxx http://lists.linuxaudio.org/listinfo/linux-audio-user
