Re: Raid 5 - not clean and then a failure.

On 26/08/2009 12:29, Jon Hardcastle wrote:
[...]

I did look into bitmaps *abit* i could easily have the imagine for my 6 drive raid 5 stored on the raid1 I have in the same system.. The googling I did tho did not paint a pretty picture it talked about huge performance hits?

There is a performance hit but it can be minimised by picking a bitmap 
chunk size to suit; I ended up getting about 80% of bitmap-less write 
performance using a 16MB bitmap chunk size instead of about 40% with the 
default size, on my 3-drive RAID-5 array.

Cheers,

John.