Option: 3

Enter disk devices separated by spaces (e.g. sda sdb): sdf

Selected disks: sdf
Samsung_SSD_870_EVO_500GB 465.8G disk sdf
Is this correct? (y/N): y

You can select one-pass for the traditional once-thru mode, or
burn-in mode to keep looping forever.

One-pass or Burn-in mode? (o/B): o
Performing initial serial array read (baseline speeds)
Sun Jun 25 15:36:18 CEST 2023
Sun Jun 25 15:38:33 CEST 2023
Completed: initial serial array read (baseline speeds)

This test checks to see how fast one device at a time is.  If all
your disks are the same type and attached in the same manner. they
should be of similar speeds.  Each individual disk will now be
compared to the average speed.  Results that are unusually slow or
unusually fast may be tagged as such.  It is up to you to decide if
there is something wrong.

Array's average speed is 519.7 MB/sec per disk

Disk    Disk Size  MB/sec %ofAvg
------- ---------- ------ ------
sdf       500107MB    520    100

This next test attempts to read all devices in parallel.  This is
primarily a stress test of your disk controller, but may also find
limits in your PCIe bus, SAS expander topology, etc.  Ideally, if
all of your disks are of the same type and connected the same way,
then all of your disks should be able to read their contents in
about the same amount of time.  Results that are unusually slow or
unusually fast may be tagged as such.  It is up to you to decide if
there is something wrong.

Performing initial parallel array read
Sun Jun 25 15:38:33 CEST 2023
The disk sdf appears to be 500107 MB.
Disk is reading at about 504 MB/sec
This suggests that this pass may take around 17 minutes

                   Serial Parall % of
Disk    Disk Size  MB/sec MB/sec Serial
------- ---------- ------ ------ ------
sdf       500107MB    520    522    100

Awaiting completion: initial parallel array read
Sun Jun 25 15:53:47 CEST 2023
Completed: initial parallel array read

Disk's average time is 914 seconds per disk

Disk    Bytes Transferred Seconds %ofAvg
------- ----------------- ------- ------
sdf          500107862016     914    100

This next test attempts to read all devices while forcing seeks.
This is primarily a stress test of your hard disks.  It does thhis
by running several simultaneous dd sessions on each disk.

Performing initial parallel seek-stress array read
Sun Jun 25 15:53:47 CEST 2023
The disk sdf appears to be 500107 MB.
Disk is reading at about 535 MB/sec
This suggests that this pass may take around 16 minutes

                   Serial Parall % of
Disk    Disk Size  MB/sec MB/sec Serial
------- ---------- ------ ------ ------
sdf       500107MB    520    538    104

Awaiting completion: initial parallel seek-stress array read
Sun Jun 25 17:22:29 CEST 2023
Completed: initial parallel seek-stress array read

Disk's average time is 4608 seconds per disk

Disk    Bytes Transferred Seconds %ofAvg
------- ----------------- ------- ------
sdf          500107862016    4608    100