Hello All,

I just recently received some free SAS drives and when I got them, unRAID would not see the drives. Doing some Googling, it looked like the issue was the drives were set to 520 sector size. So, I reformatted the drive to 512 sector size, but it still doesn't see the drive?

If I go to Tools -> System Devices -> SCSI Devices the drives show there, but the size isn't listed.

Any help appreciated!

atheon-diagnostics-20201026-1600.zip

Edited October 27, 20205 yr by Fuel

They are still being detected as 520B devices:

Oct 25 12:07:29 Atheon kernel: sd 1:0:7:0: [sdi] Unsupported sector size 520.
Oct 25 12:07:29 Atheon kernel: sd 1:0:6:0: [sdh] Mode Sense: b7 00 10 08
Oct 25 12:07:29 Atheon kernel: sd 1:0:7:0: [sdi] 0 512-byte logical blocks: (0 B/0 B)
Oct 25 12:07:29 Atheon kernel: sd 1:0:7:0: [sdi] 520-byte physical blocks
Oct 25 12:07:29 Atheon kernel: sd 1:0:7:0: [sdi] Write Protect is off
Oct 25 12:07:29 Atheon kernel: sd 1:0:6:0: [sdh] Write cache: disabled, read cache: enabled, supports DPO and FUA
Oct 25 12:07:29 Atheon kernel: sd 1:0:7:0: [sdi] Mode Sense: b7 00 10 08
Oct 25 12:07:29 Atheon kernel: sd 1:0:6:0: [sdh] Unsupported sector size 520.
Oct 25 12:07:29 Atheon kernel: sd 1:0:7:0: [sdi] Write cache: disabled, read cache: enabled, supports DPO and FUA
Oct 25 12:07:29 Atheon kernel: sd 1:0:6:0: [sdh] Attached SCSI disk
Oct 25 12:07:29 Atheon kernel: sd 1:0:7:0: [sdi] Unsupported sector size 520.

Did you reboot after?

3 hours ago, JorgeB said:

Did you reboot after?

I actually did not. I figured the drives would show up after the format. After I restarted they finally showed up and man do I feel dumb, thanks for the help and the reply!