RAID 5, COMPATIBILITY for WD5000AAKS with WD5000AAKX

hello

please just need yur help,

I am running four wd5000aaks (s) in a Raid-5 configuration.  One of the drives has failed.  I only found a  wd5000aakx and i just would like to know  if it is ok to be mixed with the wd5000 aaks’ or if the replacement must be a ‘aaks’.

Thank you…

PLEASE any help out here??

is it ok to replace the WD5000AAKS with the WD5000AAKX, and it will be complatibe with the 3 other drives?

plus will i have any problem with RAID 5?

thanks