Greg Freemyer wrote:
Just a reminder that the basic Linux approach to software raid is to use mdraid (software raid) if you can. If that cannot satisfy your needs, then move to dmraid (fake raid).
Personally, I am seriously considering using mdraid in a project soon, but I don't envision myself ever using dmraid. I guess you never know so I won't rule it out.
Greg
Greg, I think you are missing out. I have heard people tell me how bad fake raid is, blah, blah, blah but I was never able to get an answer to the simple question of why?. The first raid I ever put together was fake raid on a Gigabyte GA-7N400S that has the nVidia nForce2 MCP RAID chip. That was in 2007. Since then I have put at least 3 more, maybe 4, together and I have had zero problems. I also have 2 systems running mdraid. Same results. I have tried to find a performance difference to distinguish the two in my mind -- without any luck. From the hdparm and real world copy standpoint, I don't see a performance hit compared to a single drive, much less between the raid packages. The dmraid bonus for rebuilding is that the hardware takes care of the rebuild before you are even running on the array. Now, I don't know how it compares in hot-swap features and ability, but for my 2 disk raid1 arrays, I've never seen it stumble and I've had zero issues -- knock on wood... -- David C. Rankin, J.D.,P.E. Rankin Law Firm, PLLC 510 Ochiltree Street Nacogdoches, Texas 75961 Telephone: (936) 715-9333 Facsimile: (936) 715-9339 www.rankinlawfirm.com -- To unsubscribe, e-mail: opensuse+unsubscribe@opensuse.org For additional commands, e-mail: opensuse+help@opensuse.org