Our Linux box uses a SAN w/ocfs (Oracle Cluster File System) filesystems for /u01 - /u06 (emcpowera1 – e1, g).
The DiskIO agent only collects u01-u05, not u06.
There doesn’t appear to be any difference between emcpowerg and the others.
/dev/emcpowera1 1.0G 358M 667M 35% /u01
/dev/emcpowerb1 1.0G 751M 274M 74% /u02
/dev/emcpowerc1 1.0G 361M 664M 36% /u03
/dev/emcpowerd1 521G 243G 279G 47% /u04
/dev/emcpowere1 1.1T 744G 329G 70% /u05
/dev/emcpowerg 800G 358G 443G 45% /u06
/u06 is configured as a physical volume type rather than a logical volume type like the other /u01 - /u05.
This appears why it is not included in the collected data by DiskIO.
OCFS2 can be used with partitions (one spanning the whole LUN like the other ones) or no partitions at all.
The UNIX/EMC Administrator did not create a partition for /u06, so correcting that resolved the issue.
