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The output of your command "iostat 1 3" is:

Linux 6.8.0-54-generic (mywebtutorial) 	04/04/25 	_x86_64_	(8 CPU)

avg-cpu:  %user   %nice %system %iowait  %steal   %idle
           0.18    0.00    0.38    0.12    0.00   99.31

Device             tps    kB_read/s    kB_wrtn/s    kB_dscd/s    kB_read    kB_wrtn    kB_dscd
dm-0              6.44       188.02       159.51         0.00  348489209  295658968          0
loop0             0.00         0.00         0.00         0.00         28          0          0
loop1             0.00         0.00         0.00         0.00       5393          0          0
loop10            0.00         0.04         0.00         0.00      67119          0          0
loop11            0.01         0.02         0.00         0.00      39002          0          0
loop12            0.00         0.00         0.00         0.00       3414          0          0
loop13            0.00         0.05         0.00         0.00      99011          0          0
loop14            0.00         0.00         0.00         0.00       1322          0          0
loop15            0.00         0.00         0.00         0.00        162          0          0
loop16            0.00         0.00         0.00         0.00       1235          0          0
loop17            0.00         0.01         0.00         0.00      13619          0          0
loop18            0.00         0.00         0.00         0.00       2957          0          0
loop19            0.00         0.00         0.00         0.00       3677          0          0
loop2             0.00         0.00         0.00         0.00       7215          0          0
loop20            0.00         0.00         0.00         0.00       2291          0          0
loop3             0.00         0.01         0.00         0.00       9626          0          0
loop4             0.00         0.00         0.00         0.00       3958          0          0
loop5             0.00         0.02         0.00         0.00      34649          0          0
loop6             0.00         0.00         0.00         0.00       4386          0          0
loop7             0.00         0.00         0.00         0.00       1182          0          0
loop8             0.00         0.01         0.00         0.00      11005          0          0
loop9             0.00         0.01         0.00         0.00       9279          0          0
sda               5.16       188.22       159.61         0.00  348859775  295832268          0


avg-cpu:  %user   %nice %system %iowait  %steal   %idle
           0.00    0.00    0.24    0.12    0.00   99.63

Device             tps    kB_read/s    kB_wrtn/s    kB_dscd/s    kB_read    kB_wrtn    kB_dscd
dm-0              0.00         0.00         0.00         0.00          0          0          0
loop0             0.00         0.00         0.00         0.00          0          0          0
loop1             0.00         0.00         0.00         0.00          0          0          0
loop10            0.00         0.00         0.00         0.00          0          0          0
loop11            0.00         0.00         0.00         0.00          0          0          0
loop12            0.00         0.00         0.00         0.00          0          0          0
loop13            0.00         0.00         0.00         0.00          0          0          0
loop14            0.00         0.00         0.00         0.00          0          0          0
loop15            0.00         0.00         0.00         0.00          0          0          0
loop16            0.00         0.00         0.00         0.00          0          0          0
loop17            0.00         0.00         0.00         0.00          0          0          0
loop18            0.00         0.00         0.00         0.00          0          0          0
loop19            0.00         0.00         0.00         0.00          0          0          0
loop2             0.00         0.00         0.00         0.00          0          0          0
loop20            0.00         0.00         0.00         0.00          0          0          0
loop3             0.00         0.00         0.00         0.00          0          0          0
loop4             0.00         0.00         0.00         0.00          0          0          0
loop5             0.00         0.00         0.00         0.00          0          0          0
loop6             0.00         0.00         0.00         0.00          0          0          0
loop7             0.00         0.00         0.00         0.00          0          0          0
loop8             0.00         0.00         0.00         0.00          0          0          0
loop9             0.00         0.00         0.00         0.00          0          0          0
sda               0.00         0.00         0.00         0.00          0          0          0


avg-cpu:  %user   %nice %system %iowait  %steal   %idle
           0.00    0.00    0.08    0.08    0.00   99.84

Device             tps    kB_read/s    kB_wrtn/s    kB_dscd/s    kB_read    kB_wrtn    kB_dscd
dm-0              5.13         0.00        17.95         0.00          0         28          0
loop0             0.00         0.00         0.00         0.00          0          0          0
loop1             0.00         0.00         0.00         0.00          0          0          0
loop10            0.00         0.00         0.00         0.00          0          0          0
loop11            0.00         0.00         0.00         0.00          0          0          0
loop12            0.00         0.00         0.00         0.00          0          0          0
loop13            0.00         0.00         0.00         0.00          0          0          0
loop14            0.00         0.00         0.00         0.00          0          0          0
loop15            0.00         0.00         0.00         0.00          0          0          0
loop16            0.00         0.00         0.00         0.00          0          0          0
loop17            0.00         0.00         0.00         0.00          0          0          0
loop18            0.00         0.00         0.00         0.00          0          0          0
loop19            0.00         0.00         0.00         0.00          0          0          0
loop2             0.00         0.00         0.00         0.00          0          0          0
loop20            0.00         0.00         0.00         0.00          0          0          0
loop3             0.00         0.00         0.00         0.00          0          0          0
loop4             0.00         0.00         0.00         0.00          0          0          0
loop5             0.00         0.00         0.00         0.00          0          0          0
loop6             0.00         0.00         0.00         0.00          0          0          0
loop7             0.00         0.00         0.00         0.00          0          0          0
loop8             0.00         0.00         0.00         0.00          0          0          0
loop9             0.00         0.00         0.00         0.00          0          0          0
sda               3.21         0.00        17.95         0.00          0         28          0