# sleep 5; echo y | mkfs -t ext4 /dev/sdb1

root@ub20:/home/makoto# dmesg|grep sdb
[    2.364652] sd 2:0:0:0: [sdb] 156250080 512-byte logical blocks: (80.0 GB/74.5 GiB)
[    2.365619] sd 2:0:0:0: [sdb] Write Protect is off
[    2.365622] sd 2:0:0:0: [sdb] Mode Sense: 43 00 00 00
[    2.366635] sd 2:0:0:0: [sdb] Write cache: enabled, read cache: enabled, doesn't support DPO or FUA
[    2.439814]  sdb: sdb1
[    2.442781] sd 2:0:0:0: [sdb] Attached SCSI disk
[  136.201638] EXT4-fs (sdb1): mounted filesystem with ordered data mode. Opts: (null)


# time { sleep 5; echo y | mkfs -t ext4 /dev/sdb1; }
mke2fs 1.45.5 (07-Jan-2020)
Creating filesystem with 19530999 4k blocks and 4890624 inodes
Filesystem UUID: de280a33-a06f-4807-9730-4723bd7d3e69
Superblock backups stored on blocks: 
        32768, 98304, 163840, 229376, 294912, 819200, 884736, 1605632, 2654208, 
        4096000, 7962624, 11239424

Allocating group tables: done                            
Writing inode tables: done                            
Creating journal (131072 blocks): done
Writing superblocks and filesystem accounting information: done   


real    0m24.960s
user    0m0.021s
sys     0m0.129s

root@ub20:/home/makoto# cat /proc/cpuinfo |grep model
model           : 23
model name      : Intel(R) Core(TM)2 Duo CPU     T8100  @ 2.10GHz
model           : 23
model name      : Intel(R) Core(TM)2 Duo CPU     T8100  @ 2.10GHz
root@ub20:/home/makoto# lsb_release  -a
No LSB modules are available.
Distributor ID: Ubuntu
Description:    Ubuntu 20.04 LTS
Release:        20.04
Codename:       focal
root@ub20:/home/makoto# cat /proc/version
Linux version 5.4.0-33-generic (buildd@lcy01-amd64-022) (gcc version 9.3.0 (Ubuntu 9.3.0-10ubuntu2)) #37-Ubuntu SMP Thu May 21 12:53:59 UTC 2020