Thanks again, didnt recognized that. SMART values looked good.
Yes, I had a second pre-clear running on another disk (same type). It finished just now.
I will make a intense system diagnostic now. Thanks for your thoughts 👍
EDIT:
A Server-Restart and/or deletion of the pre-clear plugin solved the problem.
The disks are formatted as intended.
EDIT2:
I Still get these ATA6 Errors. Thought it would be a Cable issue.
Could it be a controller issue or is the disk faulty?
Dec 4 12:56:25 STORAGE kernel: ata6: SATA max UDMA/133 abar m2048@0xa1340000 port 0xa1340280 irq 128
Dec 4 12:56:25 STORAGE kernel: ata6: SATA link up 6.0 Gbps (SStatus 133 SControl 300)
Dec 4 12:56:25 STORAGE kernel: ata6.15: Port Multiplier 1.2, 0x1b21:0x1092 r0, 3 ports, feat 0x5/0xf
Dec 4 12:56:25 STORAGE kernel: ata6.00: hard resetting link
Dec 4 12:56:25 STORAGE kernel: ata6.00: SATA link up 6.0 Gbps (SStatus 133 SControl 330)
Dec 4 12:56:25 STORAGE kernel: ata6.01: hard resetting link
Dec 4 12:56:25 STORAGE kernel: ata6.01: SATA link up 3.0 Gbps (SStatus 123 SControl 330)
Dec 4 12:56:25 STORAGE kernel: ata6.02: hard resetting link
Dec 4 12:56:25 STORAGE kernel: ata6.02: SATA link up 3.0 Gbps (SStatus 123 SControl 330)
Dec 4 12:56:25 STORAGE kernel: ata6.00: supports DRM functions and may not be fully accessible
Dec 4 12:56:25 STORAGE kernel: ata6.00: ATA-9: WDC WD120EDAZ-11F3RA0, 5PJJBWAF, 81.00A81, max UDMA/133
Dec 4 12:56:25 STORAGE kernel: ata6.00: 23437770752 sectors, multi 0: LBA48 NCQ (depth 32), AA
Dec 4 12:56:25 STORAGE kernel: ata6.00: supports DRM functions and may not be fully accessible
Dec 4 12:56:25 STORAGE kernel: ata6.00: configured for UDMA/133
Dec 4 12:56:25 STORAGE kernel: ata6.01: ATA-8: WDC WD20EADS-00R6B0, WD-WCAVY0819486, 01.00A01, max UDMA/133
Dec 4 12:56:25 STORAGE kernel: ata6.01: 3907029168 sectors, multi 0: LBA48 NCQ (depth 32), AA
Dec 4 12:56:25 STORAGE kernel: ata6.01: configured for UDMA/133
Dec 4 12:56:25 STORAGE kernel: ata6.02: ATA-8: WDC WD20EARS-00J2GB0, WD-WCAYY0234353, 80.00A80, max UDMA/133
Dec 4 12:56:25 STORAGE kernel: ata6.02: 3907029168 sectors, multi 0: LBA48 NCQ (depth 32), AA
Dec 4 12:56:25 STORAGE kernel: ata6.02: configured for UDMA/133
Dec 4 12:56:25 STORAGE kernel: ata6: EH complete
Dec 4 12:56:25 STORAGE kernel: sd 6:0:0:0: [sdg] 23437770752 512-byte logical blocks: (12.0 TB/10.9 TiB)
Dec 4 12:56:25 STORAGE kernel: sd 6:0:0:0: [sdg] 4096-byte physical blocks
Dec 4 12:56:25 STORAGE kernel: sd 6:0:0:0: [sdg] Write Protect is off
Dec 4 12:56:25 STORAGE kernel: sd 6:0:0:0: [sdg] Mode Sense: 00 3a 00 00
Dec 4 12:56:25 STORAGE kernel: sd 6:0:0:0: [sdg] Write cache: enabled, read cache: enabled, doesn't support DPO or FUA
Dec 4 12:56:25 STORAGE kernel: sdg: sdg1
Dec 4 12:56:25 STORAGE kernel: sd 6:0:0:0: [sdg] Attached SCSI removable disk
Dec 4 12:56:58 STORAGE emhttpd: WDC_WD120EDAZ-11F3RA0_5PJJBWAF (sdg) 512 23437770752
Dec 4 12:57:13 STORAGE unassigned.devices: Issue spin down timer for device '/dev/sdg'.