Storage usesage not updating correctly

[meerweten]

So i run a df -h in terminal (as i was monitoring a data transfer from one disk to another) but i couldn't seem te get it working correctly in RPIMonitor, the free space is like double:

from df -h: ma apr 6 08:59:44 CEST 2020 /dev/sdc1 1,4T 1,2T 84G 94% /media/share temp=63.4'C

from RPIMonitor:

from windows (samba):

my storage code: `static.10.name=storage1_total static.10.source=df -t ext4 static.10.regexp=sdc1\s+(\d+) static.10.postprocess=$1/1024

static.11.name=storage2_total static.11.source=df -t fuseblk static.11.regexp=sdb1\s+(\d+) static.11.postprocess=$1/1024

dynamic.14.name=storage1_used dynamic.14.source=df -t ext4 dynamic.14.regexp=sdc1\s+\d+\s+(\d+) dynamic.14.postprocess=$1/1024 dynamic.14.rrd=GAUGE dynamic.14.default=10

dynamic.15.name=storage2_used dynamic.15.source=df -t fuseblk dynamic.15.regexp=sdb1\s+\d+\s+(\d+) dynamic.15.postprocess=$1/1024 dynamic.15.rrd=GAUGE dynamic.15.default=10

web.status.1.content.9.name=Storage web.status.1.content.9.icon=usb_hdd.png web.status.1.content.9.line.1="/Data Share Used: "+KMG(data.storage1_used,'M')+" ("+Percent(data.storage1_used,data.storage1_total,'M')+") Free: "+KMG(data.storage1_total-data.storage1_used,'M')+ " Total: "+ KMG(data.storage1_total,'M') +"" web.status.1.content.9.line.2=ProgressBar(data.storage1_used,data.storage1_total) web.status.1.content.9.line.3="/storage2 Used: "+KMG(data.storage2_used,'M')+" ("+Percent(data.storage2_used,data.storage2_total,'M')+") Free: "+KMG(data.storage2_total-data.storage2_used,'M')+ " Total: "+ KMG(data.storage2_total,'M') +"" web.status.1.content.9.line.4=ProgressBar(data.storage2_used,data.storage2_total)

web.statistics.1.content.9.name=Storage1 web.statistics.1.content.9.graph.1=storage1_total web.statistics.1.content.9.graph.2=storage1_used web.statistics.1.content.9.ds_graph_options.storage1_total.label=Storage1 total space (MB) web.statistics.1.content.9.ds_graph_options.storage1_total.color="#FF7777" web.statistics.1.content.9.ds_graph_options.storage1_used.label=Storage1 used space (MB) web.statistics.1.content.9.ds_graph_options.storage1_used.lines={ fill: true } web.statistics.1.content.9.ds_graph_options.storage1_used.color="#7777FF"

web.statistics.1.content.10.name=Storage2 web.statistics.1.content.10.graph.1=storage2_total web.statistics.1.content.10.graph.2=storage2_used web.statistics.1.content.10.ds_graph_options.storage2_total.label=Storage2 total space (MB) web.statistics.1.content.10.ds_graph_options.storage2_total.color="#FF7777" web.statistics.1.content.10.ds_graph_options.storage2_used.label=Storage2 used space (MB) web.statistics.1.content.10.ds_graph_options.storage2_used.lines={ fill: true } web.statistics.1.content.10.ds_graph_options.storage2_used.color="#7777FF" `

[jcpvdm]

The default configuration calculates free space by subtracting total from used. However the real available space for you is less due to the reserved filesystem blocks on ext4. (by default 5%). You can read more here https://unix.stackexchange.com/questions/7950/reserved-space-for-root-on-a-filesystem-why.

In order to account the real available space and utilization, you can create 2 new dynamic KPIs, to extract available space and % usage directly from "df -t ext4" output. Below is copy of my own configuration, you can adapt relevant parts to yours.

static.10.name=storage1_total
static.10.source=df -t ext4
static.10.regexp=sda1\s+(\d+)
static.10.postprocess=$1/1024

dynamic.16.name=storage1_available
dynamic.16.source=df -t ext4
dynamic.16.regexp=sda1\s+\d+\s+\d+\s+(\d+)
dynamic.16.postprocess=$1/1024
dynamic.16.rrd=GAUGE

dynamic.17.name=storage1_usedperc
dynamic.17.source=df -t ext4
dynamic.17.regexp=sda1\s+\d+\s+\d+\s+\d+\s+(\d+)
dynamic.17.postprocess=$1
dynamic.17.rrd=GAUGE

web.status.1.content.9.name=Storage
web.status.1.content.9.icon=usb_hdd.png
web.status.1.content.9.line.1="<b>/storage1</b> Available: <b>"+KMG(data.storage1_available,'M')+"</b> (Total: <b>"+ KMG(data.storage1_total,'M') +"</b>)"
web.status.1.content.9.line.2=ProgressBar(data.storage1_usedperc,100,80,95)

web.statistics.1.content.9.name=Storage1
web.statistics.1.content.9.graph.1=storage1_total
web.statistics.1.content.9.graph.2=storage1_available
web.statistics.1.content.9.ds_graph_options.storage1_total.label=Storage1 total space (MB)
web.statistics.1.content.9.ds_graph_options.storage1_total.color="#FF7777"
web.statistics.1.content.9.ds_graph_options.storage1_available.label=Storage1 available space (MB)
web.statistics.1.content.9.ds_graph_options.storage1_available.lines={ fill: true }
web.statistics.1.content.9.ds_graph_options.storage1_available.color="#7777FF"