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On Wed, Sep 13, 2006 at 01:11:08PM +0200, Tomas Synek wrote: |
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> Hi Paul, |
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> |
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> I am not quite sure about using so called "hw raid". I used to have |
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> Silicon Image on my last mb and hw raid was only "bios raid" - when |
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> switched to raid0, kernel still saw two seperate discs. |
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|
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The on-board RAID controllers and most add-in RAID controllers sold |
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through normal end-user channels are software RAID. Hardware RAID |
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controllers are very expensive, have a dedicated CPU (well SPU, storage |
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processor unit) and dedicated RAM for cache. Some even have dedicated |
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battery backups for the cache. |
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|
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Even though you have to use the on board BIOS of the Silicon Image or |
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any other consumer RAID controller to configure the drives for RAID use, |
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the actual processing of the RAID is done by the OS and drivers, so it's |
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still software RAID. |
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-- |
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