70% busy sounds like a fairly busy disk to me. At 80% I think about replacing them with something faster or just better...I'd also check that your partitions are all 4KB aligned si... [by TrevorH]
Following alerts are coming for %busy device on a server
Disk Device hdisk5 is 100% busy
Please assist how do I analyse this and also how do I check the %age busy for hdisk5.
I have an Ubuntu 10.04 server on VMware that is experiencing 99% disk busy with only 1 MB of disk I/O according to nmon. 300 KB of disk I/O causes 25% to 30% disk busy.