# fio --name=seq_write_4m --ioengine=libaio --direct=1 --invalidate=1 --rw=write --bs=4m --iodepth=16 --numjobs=1 --time_based --runtime=120 --ramp_time=10 --group_reporting --directory=/mnt/datastore/Backup/ --filename=fio_4m_testfile --size=10G
seq_write_4m: (g=0): rw=write, bs=(R) 4096KiB-4096KiB, (W) 4096KiB-4096KiB, (T) 4096KiB-4096KiB, ioengine=libaio, iodepth=16
fio-3.39
Starting 1 process
seq_write_4m: Laying out IO file (1 file / 10240MiB)
Jobs: 1 (f=1): [W(1)][100.0%][w=10.3GiB/s][w=2640 IOPS][eta 00m:00s]
seq_write_4m: (groupid=0, jobs=1): err= 0: pid=1323202: Fri Jan 9 15:23:00 2026
write: IOPS=2575, BW=10.1GiB/s (10.8GB/s)(1208GiB/120001msec); 0 zone resets
slat (usec): min=189, max=3618, avg=381.58, stdev=53.83
clat (usec): min=634, max=14323, avg=5829.14, stdev=531.55
lat (usec): min=892, max=14777, avg=6210.72, stdev=534.14
clat percentiles (usec):
| 1.00th=[ 5276], 5.00th=[ 5407], 10.00th=[ 5473], 20.00th=[ 5538],
| 30.00th=[ 5604], 40.00th=[ 5669], 50.00th=[ 5735], 60.00th=[ 5800],
| 70.00th=[ 5866], 80.00th=[ 5932], 90.00th=[ 6128], 95.00th=[ 6521],
| 99.00th=[ 8029], 99.50th=[ 8979], 99.90th=[12387], 99.95th=[12911],
| 99.99th=[13435]
bw ( MiB/s): min= 8617, max=10936, per=100.00%, avg=10305.46, stdev=434.91, samples=240
iops : min= 2154, max= 2734, avg=2576.34, stdev=108.74, samples=240
lat (usec) : 750=0.01%, 1000=0.01%
lat (msec) : 2=0.01%, 4=0.01%, 10=99.71%, 20=0.29%
cpu : usr=63.47%, sys=25.96%, ctx=2741028, majf=0, minf=69
IO depths : 1=0.0%, 2=0.0%, 4=0.0%, 8=0.0%, 16=100.0%, 32=0.0%, >=64=0.0%
submit : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0%
complete : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.1%, 32=0.0%, 64=0.0%, >=64=0.0%
issued rwts: total=0,309116,0,0 short=0,0,0,0 dropped=0,0,0,0
latency : target=0, window=0, percentile=100.00%, depth=16
Run status group 0 (all jobs):
WRITE: bw=10.1GiB/s (10.8GB/s), 10.1GiB/s-10.1GiB/s (10.8GB/s-10.8GB/s), io=1208GiB (1297GB), run=120001-120001msec
Disk stats (read/write):
sdb: ios=0/1664983, sectors=0/2739102064, merge=0/107698, ticks=0/2430517, in_queue=2430517, util=80.81%