Hello,   The 6210X creates two RAIDsets.    The suggestion for using RAID6 is as 7200 RPM NL-SAS drives are getting larger and larger,  the rebuild times are therefore increasing.  Which widens the vulnerability window for a double fault condition is another drive in that RAIDset should fail.   However, with 10K/15K SAS drives being so much smaller that window is still somewhat small.   So much depends on your own needs.  I prefer R6 over R50 especially with a 6210 since it has H/W offload for parity calculation.  Which helps reduce the overhead of the dual parity.   Nice thing is that you can convert to R6 at anytime from R50.   If you have SANHQ installed you can review your load, then use the RAID evaluator to see if R6 will still provide you with the write IOPs you need.   Regards,  Don 
We have a PS610X with 24 1.2TB SAS disks (10.000 RPM, model HUC101212CSS600). The unit is currently configured in RAID 50 and has two spares. How many RAID 5 sets are actually configured? Is it 2x11 or 2x6 + 2x5 or something else? Is it still considered safe to run this configuration in RAID 50 or are we better off converting to RAID 6?
PS6210X with 24 1.2TB SAS disks in RAID 50, how many RAID 5 sets?