Advice on RAID?

[Ian Jefferson]

Robert,

I think I already sent out this link that documents FreeBSD R5  
performance:
http://www25.big.or.jp/~jam/filesystem/

I recently saw an article documenting similar benchmarks using geom  
and vinum in a Japanese FreeBSD magazine and the handbook section  
around vinum does warn about write performance of Raid 5.  For lot's  
of applications though the Raid 5 low write performance is not an  
issue. (it's not an issue for me)

Were you able to get gvinum raid 5 working? Could you share that  
experience?

I'd really like to use gvinum or raid 5 with a 3 SATA drive, + 2IDE  
drive setup but so far I have not been able to get it to work. :-(

IJ

On May 12, 2006, at 6:35 AM, Robert Fitzpatrick wrote:

> I have looked into and tried FreeBSD 6.0 Vinum and GEOM RAID in our  
> PIII
> SCSI 80-pin server with the help of several here on the list. I'm  
> pretty
> much going to use GEOM RAID-1 for the system disks using Ralf's doc. I
> have room for 3 more disks. Would you recommend using Vinum RAID-5 on
> three 73GB drives or using GEOM RAID-1 again on 2 147GB drives?
>
> If there is no big reason to use either over the other, we've  
> decided to
> go for the most space and RAID-5. But the amount of space we would be
> gaining is probably less than 50GB, correct?
>
> Or do you have another solution on our $700 budget. It is a debate  
> here
> and would like to get experienced insight.
>
> Thanks in advance for your time!
> -- 
> Robert
>
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