[Box Backup] Moving a server to RAID
boxbackup at fluffy.co.uk
Tue Mar 15 10:38:49 GMT 2005
dave bamford wrote:
> 2. Would you recommend the mobo RAID or the FC3 sw RAID?
Unless you are using a _true_ hardware RAID controller (like the 3ware
ones) then you are better off using software RAID on Linux for a number
1) Cheap hardware RAID controllers are essentially software RAID in
disguise - no cache and most of the processing is done by the CPU.
2) Linux drivers for most RAID controllers are not very good, and some
are binary only and so only work on specific kernel versions.
3) If the controller fails, you'll need to get another one exactly the
same to boot your array (with embedded controllers this is even more of
a problem). With software RAID you can move the array to another system
and it will work fine.
4) Performance is roughly the same.
The two main benefits of hardware RAID over software is caching and hot
plug facilities, however these are only available on the higher end
Jamie Neil | <jamie at versado.net> | 0870 7777 454
Versado I.T. Services Ltd. | http://versado.net/ | 0845 450 1254
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