This is true.  FLARE rebuilds LUNs, not RAID Groups, so if you have a 2TB RAID Group with just a single 50GB LUN, FLARE only rebuilds the data for the 50GB LUN.  The best practices guides for CLARiiON and VNX provide average MB/sec rebuild rates which depend on the rebuild priority and system load..  EFD disks: Priority   -   MB/sec rebuild Low      -    2 Medium -    6 High      -    13 ASAP   -    160  15K Disks: Priority   -   MB/sec rebuild Low      -    2 Medium -    6 High      -    13 ASAP   -    70-80  As you can see, there is a very large increase in rebuild rate for the ASAP priority in exchange for a potential performance impact.
Hi,  I am composing a DR document and need to know what is the expected  length of time for the recovery of RAID group following a disk failure in a Clariion CX-4 storage array for the following disk types:   I have so far been unable to find any literature that gives me any indication so your help will be greatly appriciated.  Thanks
Length of time for recovery of RAID group following disk failure