HP EVA8100 config connected to IBM SVC

[Uwe Zessin]

Another point I think which has not been covered is the handling of disk failures.

The EVA does not use dedicated spare disk drives - it includes the disk drive mechanices into the disk group and virtualizes their space as well. So data and 'protection space' (defined by the so-called 'protection level' - horrible name as it DOES NOT provide the RAID protection!) share the same set of disk drives. The idea is that the 'spare drives' can be used for user I/O as well.

The size is calculated as 0, 2 or 4 times the size of the largest disk drive in the disk group. Yes, it is per disk group!!