The document discusses a RAID level 5 configuration involving five disks, where parity for sets of four blocks on four disks is stored on the fifth disk. It poses a question regarding the number of blocks accessed when performing a write of seven continuous blocks of data. The focus is on understanding the access pattern in a RAID 5 setup during such write operations.

1. Operating system class
Consider a RAID level 5 organization comprising five disks, with the parity for sets of four blocks
on four disks stored on the fifth disk. How many blocks are accessed in order to perform a write of
seven continuous blocks of data. ? How many blocks are accessed in order to perform a write of
seven continuous blocks of data. ?