On 16 Feb 2004 14:59:38 -0800, chrish@po.wr.com (Chris) wrote:

>The cache on the ESS makes using RAID5 less troublesome than doing so
>on SSA does; but I was curious when write acknowledgements occur. Is
>a write acknowledged after it is written to cache, or after it is
>written to disk?
>
>Thanks,
>Chris

Write is acknowledged as soon as the data is written to the
battery-backed/accessable by both clusters write cache. (Or is it nvram
and not battery backed -- can't remember right now). In any case, you need
to loose Both sides of the ESS before you loose the data.

Tom