Hello Sudipta Roy,

With a compellent system the data is spread amongst all the drives in the system.  Here is a link to the administrator guide and if you look on page 37 it explains about disk management. https://dell.to/3Fl56z0

The compellent groups the disks together. The fastest disk goes into Tier1 and the slowest into Tier3. If your have enough disks into a Tier the system stripes the data over 5 or 9 disks when speaking about Raid5 and 6 or 10 when having Raid6.

Depending on the setting for Single Redundancy(Raid5) or Dual Redundancy (R6)  on a Tier you see a RAID5-5 or RAID5-9  or RAID6-6 or RAID6-10. The second number indicated the size of the stripe size.

Regards,
Joerg