Re: Software RAID5 with 2.6.0-test

[Måns Rullgård]

Jakob Oestergaard <jakob@xxxxxxxxxxxxx> writes:

>> >    many clock cycles availble to it.  It's even worse when you realize
>> >    the 2Ghz xeon is a better proccessor in many more ways than just
>> >    clock cycles.
>> 
>> How about this logic:
>> 
>> 1) If the processor on the RAID controller can handle the full
>> bandwidth of the disks, it's fast enough.
>> 2) If someone else does the 10% work, the CPU can do 10% more work.
>
> 3) You have a four year old machine - one day the RAID controller dies.
>    The company that produced it has been acquired by someone else, and
>    the product is no longer availble.  Can you get a new adapter with
>    firmware that can actually read your disks?   Or are your data lost?
>    Can you find a replacement controller on e-bay?  And would you want
>    to?

What are backups for?  That argument applies to any controller, for
anything.  What if you wanted to read those old 8" floppies?  Or that
hard disk from the PDP/11.

If a four year old RAID controller breaks, maybe it's time to get new
disks anyway.

-- 
Måns Rullgård
mru@xxxxxxxxxxxx

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