dietpi@DietPi:~$ journalctl | grep sd[a-z]
Hint: You are currently not seeing messages from other users and the system.
      Users in the 'systemd-journal' group can see all messages. Pass -q to
      turn off this notice.
No journal files were opened due to insufficient permissions.
dietpi@DietPi:~$ sudo journalctl | grep sd[a-z]
Feb 08 18:13:41 DietPi kernel: sdhci: Secure Digital Host Controller Interface driver
Feb 08 18:13:41 DietPi kernel: sdhci: Copyright(c) Pierre Ossman
Feb 08 18:13:41 DietPi kernel: sdhci-pltfm: SDHCI platform and OF driver helper
Feb 08 18:13:41 DietPi kernel: sdhci-iproc fe340000.emmc2: Linked as a consumer to regulator.3
Feb 08 18:13:41 DietPi kernel: sdhci-iproc fe340000.emmc2: Linked as a consumer to regulator.4
Feb 08 18:13:42 DietPi kernel: sd 0:0:0:0: [sda] 60567552 512-byte logical blocks: (31.0 GB/28.9 GiB)
Feb 08 18:13:42 DietPi kernel: sd 0:0:0:0: [sda] Write Protect is off
Feb 08 18:13:42 DietPi kernel: sd 0:0:0:0: [sda] Mode Sense: 45 00 00 00
Feb 08 18:13:42 DietPi kernel: sd 0:0:0:0: [sda] Write cache: disabled, read cache: enabled, doesn't support DPO or FUA
Feb 08 18:13:42 DietPi kernel:  sda: sda1
Feb 08 18:13:42 DietPi kernel: sd 0:0:0:0: [sda] Attached SCSI removable disk