Good after-noon, I have a problem that I never encountered: I built a new computer on which I installed Ubuntu server 20.04. This computer replace another computer that ran Ubuntu server 18.04. This old computer had a ZFS pool. I exported the pool then I transfered the 6 disks of the array from the old computer to the new computer. I tried to import the array and got a message saying "One or more devices contains corrupted data." I checked the partition table of the faulty drive and parted returned "Error: Both the primary and backup GPT tables are corrupt. Try making a fresh table, and using Parted's rescue feature to recover partitions." After some googling I checked the identity information and found the problem: charles@paris:~$ sudo hdparm -N /dev/sda /dev/sda: SG_IO: bad/missing sense data, sb[]: 70 00 05 00 00 00 00 0a 04 51 40 01 21 04 00 00 80 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 SG_IO: bad/missing sense data, sb[]: 70 00 05 00 00 00 00 0a 04 51 40 01 21 04 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 max sectors = 16016012464/1(1?), HPA setting seems invalid (buggy kernel device driver?) It seems the number of sectors reported is wrong for a 6TB drive (this is a WD Red 6TB). It should be 11721045168. smartctl report an incoherence between the identity of the drive and its reported size: charles@paris:/var/log/snort$ sudo smartctl -a /dev/sda smartctl 7.1 2019-12-30 r5022 [x86_64-linux-5.4.0-109-generic] (local build) Copyright (C) 2002-19, Bruce Allen, Christian Franke, www.smartmontools.org Warning! Drive Identity Structure error: invalid SMART checksum. === START OF INFORMATION SECTION === Model Family: Western Digital Red Device Model: WDC WD60EFZX-68B3FN0 ! Serial Number: WD-C812PE5G LU WWN Device Id: 5 0014ee 269593ef3 Firmware Version: 81.00A81 User Capacity: 8,200,198,381,568 bytes [8.20 TB] Sector Sizes: 512 bytes logical, 4096 bytes physical Rotation Rate: 5640 rpm Form Factor: 3.5 inches Device is: In smartctl database [for details use: -P show] ATA Version is: ACS-3 T13/2161-D revision 5 SATA Version is: SATA 3.1, 6.0 Gb/s (current: 6.0 Gb/s) Local Time is: Thu May 12 14:37:59 2022 CEST SMART support is: Available - device has SMART capability. SMART support is: Enabled I tried to fix the number of sectors by reseting it with: charles@paris:~$ sudo hdparm -Np11721045168 --yes-i-know-what-i-am-doing /dev/sda /dev/sda: setting max visible sectors to 11721045168 (permanent) SG_IO: bad/missing sense data, sb[]: 70 00 05 00 00 00 00 0a 04 51 40 01 21 04 00 00 80 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 SG_IO: bad/missing sense data, sb[]: 70 00 05 00 00 00 00 0a 04 51 40 01 21 04 00 00 a0 af 00 00 00 00 00 00 00 00 00 00 00 00 00 00 SG_IO: bad/missing sense data, sb[]: 70 00 05 00 00 00 00 0a 04 51 40 01 21 04 00 00 80 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 SG_IO: bad/missing sense data, sb[]: 70 00 05 00 00 00 00 0a 04 51 40 01 21 04 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 max sectors = 16016012464/1(1?), HPA setting seems invalid (buggy kernel device driver?) But to no avail. I thought the disk may have been faulty so I ordered a new one (a Toshiba N300 6TB) and replaced the WD. I had the exact same problem of a wrongly reported number of sectors right after the 1st boot with the drive: charles@paris:~$ sudo hdparm -N /dev/sda /dev/sda: SG_IO: bad/missing sense data, sb[]: 70 00 05 00 00 00 00 0a 04 53 40 01 21 04 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 max sectors = 16016012464/11721045168(1?), HPA setting seems invalid To me it seems like maybe a bad SATA port on the motherboard. Could it be? Would it cause this kind of issue? Has anybody faced this? Is it possible to save the 2 disks for which the number of sectors is wrong? I spent many hours googling about it but couldn't really find a way. If you ave any suggestion to recover these disks, let me know. thanks! Charles -- Charles Nadeau Ph.D.