Isilon: A300 and A3000 SSD caching strategy

Below is an example of the error:

a3001-1# isi storagepool nodepools modify a300_120tb_6.4tb-ssd_96gb --l3 false -f
Disabling L3 not supported for given node type.

A300-L and A3000-L nodes require a L3 SSD caching strategy, and this cannot be changed. However in OneFS versions 9.2.1.0 through 9.2.1.3, there was an incorrectly hard coded check that unnecessarily applied this limitation to non-L A300 and A3000 nodes.

A300-L and A3000-L nodes continue to require L3 as their SSD caching strategy, and this setting cannot be changed on these nodes.

To check in cluster logs to see if the affected A300 or A3000 is an L model, run the following commands at the root of a log set:

[host@**]$ grep -i '"MODEL":' */isi_psi_tool_receipt

Output looks similar to the following (note the '-L' at the end of the model string):

test-1/isi_psi_tool_receipt:    "MODEL": "A3000-16T8-L",
test-2/isi_psi_tool_receipt:    "MODEL": "A3000-16T8-L",
test-3/isi_psi_tool_receipt:    "MODEL": "A3000-16T8-L",

To check the model information about a live node, run:

test-1# isi_for_array -sX '/usr/bin/isi_hwtools/isi_psi_tool -v | grep MODEL\":'

If the affected node is not an -L model, and you are running a OneFS version between 9.2.1.0 and 9.2.1.3, your nodes are affected by the aforementioned software issue. Upgrade to OneFS 9.2.1.4 or newer to resolve the issue.