of=3D/dev/zero on it (in a macOS terminal window. I'm getting=20 $ sudo dd if=3D/dev/rdisk12 of=3D/dev/zero bs=3D512 Password: dd: /dev/rdisk12: Invalid argument 0+0 records in 0+0 records out 0 bytes transferred in 0.000036 secs (0 bytes/sec) $=20 also without the bs=3D512 not any better. An ideas what might be wrong? -- Christoph --Apple-Mail=_C481689E-8E22-4536-A434-76732343DA7F Content-Transfer-Encoding: quoted-printable Content-Type: text/html; charset=us-ascii Hi = co-readers,

excuse me for coming up with a non = FreeBSD question but I'm sure many "also macOS" users are = here.
I got an SSD external drive today from China. It's = supposed to have 10TB and has the name "SEAGATE" engraved on the cover = which I haven't opened
yet, also because it's clipped together = - no screws.

Anyway, I = tried


# dd if=3D/dev/rdisk12 = of=3D/dev/zero

on it (in a macOS terminal = window.

I'm getting 

$ sudo dd if=3D/dev/rdisk12 = of=3D/dev/zero bs=3D512

Password:

dd: /dev/rdisk12: = Invalid argument

0+0 records = in

0+0 records = out

0 bytes = transferred in 0.000036 secs (0 bytes/sec)


also without the bs=3D512 not = any better.

An ideas what might be = wrong?

--
Christoph

= --Apple-Mail=_C481689E-8E22-4536-A434-76732343DA7F-- --Apple-Mail=_57F944F9-6358-4258-9B39-AB1AE8B6F476 Content-Transfer-Encoding: 7bit Content-Disposition: attachment; filename=signature.asc Content-Type: application/pgp-signature; name=signature.asc Content-Description: Message signed with OpenPGP -----BEGIN PGP SIGNATURE----- iQEzBAEBCAAdFiEE8MURBkjzmtxtP7R5XtERIzsPlvIFAmkGFMgACgkQXtERIzsP lvK8Zwf+OL7JTH6Hf9RYJBhAC+4tpI0VUcS88we75AjxoP/OXR5szSpjAthJt5KA cDgCNw99CJbJ9hSUoxPZExwPHeLvgSBc/GdM7ranF8bpuzhLEkK36i4zF8N3fdMC 2Zrce5LuYH4qAW+UhSMbuC9r4GpBRdCiaSMlC4Xzz6WDp1xtp6ONZY/IwhwqtKcT 0Li0yLFRe6YEG9Mhj5GmLsn6efkeu+fbBpSaxsgi0Og+JOPbmedMghDbPvGNFGkq Gg3genE4RABLdg5yCuvTJlYVNcoXC/FAp8PDs5GpwIx4xDvEmEJx8oQ4/7P+jK+h lV5T2cOaihB6niRD4iwBQy+oUtghEw== =r+eP -----END PGP SIGNATURE----- --Apple-Mail=_57F944F9-6358-4258-9B39-AB1AE8B6F476--