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How to monitor a ram disk?

0 votes
Some server creates a ram disk every restart.
Here my config: 
kernel ..... ramdisk_size=16777216
mke2fs -m 0 /dev/ram0
mount /dev/ram0 /fbswap
df -h:
/dev/ram0              16G   44M   16G   1% /fbswap
/dev/ram0 on /fbswap type ext2 (rw)
rocommunity XY
disk /fbswap
But OpenNMS doesn't create a ressource graph (Section: Disk Table Index (UCD-SNMP MIB)) for this disk. 
OpenNMS version
asked Mar 18, 2014 by mfuhrmann (7,350 points)
Dose it collect data for it? Check if there are RRDs for it on your disc.
No, it doesn't

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