Drive Access at 100% Utilization

[egdemattia]

I have a storage array and one of the logical volumes stays at 100% utilization whenever any process accesses the volume. It is a 9TB RAID 5 array on it's own SCSI interface card. I have another 9TB logical volume in the same chassis, on it's own card that does NOT exhibit the same behavior.

I'm measuring the utilization using atop. The strange thing is it pegs out at 100% utilization for the entire time a process accesses the volume, even when the data being accessed is just a few kb. My users home directories reside on this volume so as you can imagine every user is impacted whenever someone accesses any file from this volume.

The only processes being shown in atop are nfsd processes and xfslogd process. Nothing has been deliberately changed on this system. The only thing out of the ordinary that changed is a user deleted several TB from his home directory a week or so ago, just about the same time this problem came up. During the troubleshooting process, tis system has been rebooted several times.

Any ideas?

[gogalthorp]

Pure guess the array is rebuilding because of image inconstancies.

Look into the health of the array.

[egdemattia]

Are there Linux utilities to do this or are we talking about from the BIOS of the controller?

[jschutten]

Are there Linux utilities to do this or are we talking about from the BIOS of the controller?

google: howto health array linux

Hoop the above helps