On Thursday, 30.11.2006 at 22:53 +0100, Matus UHLAR - fantomas wrote: > > > On 30.11.06 15:44, Johannes Wiedersich wrote: > > > > What is debian's opinion about hardware/software raid? > > > On Thursday, 30.11.2006 at 16:56 +0100, Matus UHLAR - fantomas wrote: > > > it highly depends on the hardware raid. The true hardware RAID with > > > hotspare, hotswap etc. support and with proper drivers (so you won't have to > > > boot into its bios to reconfigure it) will be much more reliable. > > > > > > > On the other hand, performance will probably be better with a dedicated > > > > hardware raid controller. > > > > > > it highly depends on the hardware raid. The true hardware RAID with XOR > > > counting and mirroring support will be much faster. > > On 30.11.06 16:01, Dave Ewart wrote: > > Although it's worth pointing out that software RAID-*1* (one of the > > options under consideration) has almost no CPU overhead, and is often a > > good low-cost option. > > I did not want to mention this, because: > > - software RAID-1 has bus overhead (the same data have to be transferred > multiple times to multiple drives, so writing may be twice as slow) That's why I also said "Part of your decision must rest on what exactly the machine will be doing" since one may or may not care about the extra disk I/O in some environments. Equally, it could be completely inappropriate in other environments. As always, "it depends" :-) Dave. -- Please don't CC me on list messages! ... Dave Ewart - davee@sungate.co.uk - jabber: davee@jabber.org All email from me is now digitally signed, key from http://www.sungate.co.uk/ Fingerprint: AEC5 9360 0A35 7F66 66E9 82E4 9E10 6769 CD28 DA92
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