by I suspect disk bottlenecks on my E450 system (internal SCSI disks).
virtual_adrian.se from the SE toolkit keeps on screaming "Move load from
busy disks to idle disks".
I want to conclusively prove that my disks need to be upgraded, move to
RAID, etc.
How do I go about measuring disk throughput, etc? I know that a few disks
are "going slow" on me using the traditional iostat, sar, etc tools. Is it
possible for a disk to degrade over time? I thought that a disk either
works at its rated throughput or stops working. No in-between. But I can
almost swear I am seeing my disks slow down.
Thanks