Hello, I have 4 HGST 4TB 7200RPM SAS that I’ve tried to add to a new pool. I got one of them that gave the following error message: “disk: ‘sdb’ is incorrectly formatted with data integrity feature (dif).” so I went googling and saw the sg_format command was what to use in cases like that. I went…

Thanks! By using a different HBA adapter with IT mode, I was able to pass the drive in a failed state and relaunch the command which brought back the drive. Problem solved.

Actually the controller sees the drive as a 0kb drive with the status “failed”. These are “Sun Oracle” branded BTW.

Unfortunately the drive does not appear at all in “disk” in truenas so I doubt that will be happening in my case. The Dell controller sees the disk plugged but report a failed state and a 0kb capacity.

I’ve tried from a different server, I’ve tried to let the drive seat unplugged for a while, but still no cigar. What does sg_format do to a drive that it can brick it? Please explain.

If you use the --ffmt option it turns it into minutes not hours for info. sg_format --format --ffmt=1 --size=4096 /dev/da0

SAS drive not showing up after sg_format command was interrupted

TrueNAS General

fayelund October 31, 2024, 11:22am 4

My experience is that the format continues in the background, you just miss the progression. I believe my disks(8tb) used around 15 hours to reformat.

Topic		Replies	Views
Drive stuck on formatting TrueNAS General	7	1383	November 11, 2024
Data Integrity Feature (DIF) which is unsupported TrueNAS General SCALE	12	4401	February 20, 2026
SAS ST4000NM0034 recognized in LSI, Trunas, Spun up but can't wipe TrueNAS General SCALE , Hardware	4	105	January 29, 2025
Error: [EFAULT] Disk: 'sde' is incorrectly formatted with Data Integrity Feature (DIF) TrueNAS General SCALE , Hardware	9	3325	May 20, 2025
Hard drives not appearing as available to add to pool after format TrueNAS General	1	55	July 25, 2025

SAS drive not showing up after sg_format command was interrupted

Related topics