On Mon, Sep 10, 2012 at 09:29:25AM +0800, Jack Wang wrote: > below patch should fix your bug. Thank you Jack - that was a very quick response! I'm building a new kernel with this patch now and will report back. However, I think the existence of this bug suggests that Linux with software RAID is unsuitable for production use. There has obviously been no testing of basic critical functionality like hot-plugging drives, and serious regressions are introduced into supposedly "stable" kernels. So I'm now on the lookout for a 24-port SATA RAID controller with good Linux support. What are my options? Googling I have found: * 3ware 9650SE-24 * Areca ARC-1280ML * LSI MegaRAID 9280-24i (newer SAS/SATA) * Areca ARC-1882ix-24 (newer SAS/SATA) However I see some people suggesting just a RAID card with a few ports plus a SAS expander backplane. This would be fine too - I don't mind an aggregate throughput limit of 6Gb/s for some or all of the drives. I just want to be sure that the RAID controller will handle all the possible failure modes and swap events of the various drives. Regards, Brian.
