One of our filers, an F330, is very overloaded (80-100% CPU usage and 1000-1500 NFS ops/sec for most of the 24 hour day) and is always very close to being full. Both shelf pairs are full of 4 GB disks. We also have an F540 and an F630, which are far less loaded.

Interestingly, the F330 is the most stable filer we have had: no disk failures in over a year, no major problems. I wish our other filers were so rock solid. *sigh* Our other two filers have had so many problems, I can't remember them all: failed disks, failed ethernet transceiver, bad shelves, SCSI problems, etc.

Unfortunately, the data on the F330 is some of most critical data at our company. More than a few hours of downtime is *not* an option.

I read Tom Yates's "migrating an F330 to a mixed-disc configuration" messages, so I'm not really inclined to try that. Are there any other options for fixing the performance and disk space problem that you would recommend?

- Dan