SAN graphics no "write data" when hmc connection changed from ssh to rest api

edited August 2022 in LPAR2RRD

Hello, I have weird behaviour with my san graphs , when I've changed connection from ssh to rest api,

all san cards have only "read data" visible on the graphics and no "write data".

In the past I was already using rest api , then switch to ssh for few months and now back to rest api,

which resulted in this san graphics problem, but this only exists for machines which previously was using rest api, all my freshly installed Power servers don't have this issue and san graphics are correct.

Is there a way to clean/refresh san graphs , so it will gather it again with read and write IO ?

I'm using 7.42-10 version , with updated issue for S922 servers.

Currently it looks like this:


  • Hi,

    send us your current SAN data file.

    You can find it here:

    cd /home/lpar2rrd/lpar2rrd; #or your LPAR2RRD directory

    ls -l data/<server_name>/<hmc_name>/iostat/HMC_<hmc_name>_san_perf_xxxx.json

    Upload the file to and note a short problem description please.

  • thank you for your response, file is uploaded.

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