Understanding disk/volume read/write in Resource Manager

[ed.j]

Bit confused about how to understand r/w activity in the Resource Manager.

I'm currently rebuilding the array after switching a drive for a larger one

In Task Manager - Services, Raid process is writing at about 100 MB/s. Nothing else showing as writing
The Performance - Overview - Volume graph is showing write at about 300 KB/s
Performance - Disk - write speed is about 300 MB/s

I have noticed large discrepancies between these numbers before but they are much more pronounced now that the rebuild is in proces.

Shouldn't these numbers all be roughly the same?! I know disk /= volume, but the volume is stored on the disks....?

 

[fredbert]

Never thought about it.

Volume info could be real use of data, not maintenance manipulation.
RAID process could be the about of real data/blocks being processed: remembering that RAID works on multiple drives to store the same data (e.g. real data and parity data).
Disk could be accumulated access across the drives regardless of what is causing it to read/write.