[Asterisk-Users] RAID affecting X100P performance...

[Kevin P. Fleming]

Scott Laird wrote:

> That hasn't been my experience at all.  Frankly, I've never seen a cheap 
> (<$3k) hardware RAID controller that can touch software RAID's 
> performance on Linux, especially in "challenging" setups, like RAID-5.  
> Sure, software RAID eats more CPU, but most PCs have CPU to spare these 
> days.  Would you rather eat 10% of one of your Xeon CPUs to get 200 
> MB/sec or 100% of an Intel 960 to get 15 MB/sec?

While this is certainly true, in the context of Asterisk you also have 
to consider the extra PCI bus usage for all this data going back and 
forth to the drives while the RAID parity/mirror stuff is being done.

> In the context of Asterisk, where disk I/O is either logging or 
> voicemail, buying a 3ware card and a pair of IDE drives seems like a 
> decent business decision.

Yep, it works very well.