I created this idea today based on a problem we are currently having with our TS4300 (3555) Tape Library and associated LTO 9 drives

IBM Ideas

The short version - I am asking IBM to consider externalizing the environment sensor data (humidity and temp) that are being captured by the drives into the event log viewer for visibility. 

Thanks in advance for considering this idea. 

------------------------------
Rich Malloy
Principal Systems Engineer - IBMi
Cox Automotive
Draper UT
------------------------------

Hello Rich,

At CERN we do have an external script that collects temperature and humidity values from the tape drives and feeds that information into our monitoring. When the thresholds are breached, we are informed.

I would recommend you to have a look at the LTO SCSI Reference: 

https://www.ibm.com/support/pages/system/files/inline-files/[APPROVED]%20LTO%20SCSI%20Reference%20GA32-0928-06.pdf

On page 265 there is "Table 239 — LP 0Dh[01h]: Environmental Reporting log parameters". The subsequent sections "6.4.9.2.1 Temperature Report parameter data" and  "6.4.9.2.2 Relative Humidity Report parameter data" explain in details the information you are after.

In addition to that, here is a simple example shell and AWK script for humidity:

/usr/bin/sg_logs --page=0x0D,0x01 --paramp=0x0000 --control=1 --hex $1 | awk '/^.?20/ {
  printf "Relative humidity\n"
  printf "Current: %d\n", strtonum("0x"$3)
  printf "Lifetime max: %d\n", strtonum("0x"$4)
  printf "Lifetime min: %d\n", strtonum("0x"$5)
  printf "Power max: %d\n", strtonum("0x"$6)
  printf "Power min: %d\n", strtonum("0x"$7)
  printf "Mount max: %d\n", strtonum("0x"$8)
  printf "Mount min: %d\n", strtonum("0x"$9)
}'

Hope this helps.  Best regards,

------------------------------
Vladimir Bahyl
CERN
------------------------------