2010-05-25 05:45 PM
On a space restricted filer, I can't help but notice that 9G of usable (post-tax) space is dedicated to vol0, which contains less than .5G of actual data. I tried an end-run around this:
Obviously this was a spectacular failure.
As a workaround, would there be any downside to expanding vol0 to take the entire aggregate, and then simply storing user data directories in it? In this particular case this is an FAS2020 with X268_SGLXY750SSX AQJZ 635.5GB 512B/sect drives. But the identical space reservation appears on other versions of Data OnTAP with other drive geometries. Is it just 9G no matter what?
Solved! SEE THE SOLUTION
2010-06-08 04:51 AM
From the System Administration Guide on root volume recommendations (7.2.7):
Size requirement for root FlexVol volumes
The root volume must have enough space to contain system files, log files, and core files. If a system problem occurs, these files are needed to provide technical support.
In contrast with traditional volumes, it is possible to create a FlexVol volume that is too small to be used as the root volume. Data ONTAP prevents you from setting the root option on a FlexVol volume that is smaller than the minimum root volume size for your storage system model, and prevents you from resizing the root volume below the minimum allowed size.
A root FlexVol volume must have a space guarantee of volume. Data ONTAP prevents you from setting the root option on a FlexVol volume that does not have a space guarantee ofvolume, and prevents you from changing the space guarantee for the root volume.
The minimum size for a root FlexVol volume depends on your storage system model. The following table lists the minimum allowed size for root volumes.
Storage system model Minimum root FlexVol volume size FAS250 9 GB FAS270 10 GB FAS2020 10 GB FAS2050 12 GB FAS920 12 GB FAS940 14 GB FAS960 19 GB FAS980 23 GB FAS3020 12 GB FAS3040 16 GB FAS3050 16 GB FAS3070 23 GB FAS3140 16 GB FAS3170 37 GB FAS6030 37 GB FAS6040 37 GB FAS6070 69 GB FAS6080 69 GB R200 19 GB SA200 12 GB SA300 23 GB SA600 69 GB
It is recommended that you avoid storing user data in the root volume, regardless of the type of volume used for the root volume.