High Wait-IO due to 100% utilization of sdcard - sdcard damaged?

Hi all,

my OMV2 is running since over 300 days non stop on a banana PI without any issues.
Everything is moved onto a SSD via SATA.

So there is only the required boot-stuff on the sdcard.

Since last night I get high CPU percentage because of high wait-io.

The iostat command tells me 100% utilization of the sdcard:

avg-cpu:  %user   %nice %system %iowait  %steal   %idle
          12.12    0.00    3.79   84.09    0.00    0.00


Device:         rrqm/s   wrqm/s     r/s     w/s    rkB/s    wkB/s avgrq-sz avgqu-sz   await r_await w_await  svctm  %util
sda               0.00     3.00    0.00   10.50     0.00    54.00    10.29     0.01    0.95    0.00    0.95   0.95   1.00
mmcblk0           0.00     0.00    0.00    0.00     0.00     0.00     0.00   106.00    0.00    0.00    0.00   0.00 100.00

Is the sdcard damaged or where does the high wait IO come from?

I do not want to try to reboot, as this would probably fail, if the sdcard is damaged.

Thanks a lot.

one partition of the sdcard is obviously damaged.

I am not accessing the sd card anymore except for the boot-partition which seems to work well...