Bug 442728

Summary:	Data rate read/write does not work for md RAID devices
Product:	[Frameworks and Libraries] ksystemstats	Reporter:	Gerhard <gstengel>
Component:	General	Assignee:	Plasma Bugs List <plasma-bugs-null>
Status:	RESOLVED FIXED
Severity:	normal	CC:	ahiemstra, john.kizer, nate, notmart
Priority:	NOR
Version First Reported In:	unspecified
Target Milestone:	---
Platform:	openSUSE
OS:	Linux
Latest Commit:		Version Fixed/Implemented In:
Sentry Crash Report:

Description Gerhard 2021-09-20 09:32:58 UTC

Monitoring hard disk data rate read/write works fine for individual hard disks or NVMes, but if I try to monitor a soft raid (md device), the data rate is always zero.
The interesting thing is that the data rate sensors of the hard disks that form the md device (sda and sdb in my case) show correct values.

The behaviour is the same using ksysguard or the plasma widget.

The sensor's names in ksysguard are 
disk/mdXXX_(X:XXX)/Rate/rblk
disk/mdXXX_(X:XXX)/Rate/wblk

SOFTWARE/OS VERSIONS
Linux/KDE Plasma: openSUSE Tumbleweed 20210916
KDE Plasma Version: 5.22.5
KDE Frameworks Version: 5.86.0
Qt Version: 5.15.2

ADDITIONAL INFORMATION
Kernel 5.13.13

Comment 1 Gerhard 2021-10-16 09:14:07 UTC

Meanwhile, I've upgrade my openSUSE Tumbleweed installation a bit and it works now!

SOFTWARE/OS VERSIONS
Linux/KDE Plasma: openSUSE Tumbleweed 20211012
KDE Plasma Version: 5.22.5
KDE Frameworks Version: 5.86.0
Qt Version: 5.15.2

ADDITIONAL INFORMATION
Kernel 5.14.9

So, a major difference is the kernel version and that most Qt packages now have a version 5.15.2+kde222.

Comment 2 John Kizer 2025-05-16 14:50:20 UTC

Updating the status here based on the reporter indicating that the issue was fixed along with either a kernel or Qt update - please reopen if this is incorrect and the issue still occurs. Thanks!