From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail-ig0-f170.google.com ([209.85.213.170]:35354 "EHLO mail-ig0-f170.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751623AbbKINkD (ORCPT ); Mon, 9 Nov 2015 08:40:03 -0500 Received: by igl9 with SMTP id 9so30396678igl.0 for ; Mon, 09 Nov 2015 05:40:02 -0800 (PST) Subject: Re: mkfs.btrfs doesn't detect SSD To: Christoph Anton Mitterer , linux-btrfs@vger.kernel.org References: <1446908706.7774.3.camel@scientia.net> <1446910202.7774.5.camel@scientia.net> From: Austin S Hemmelgarn Message-ID: <5640A22C.2030604@gmail.com> Date: Mon, 9 Nov 2015 08:39:56 -0500 MIME-Version: 1.0 In-Reply-To: <1446910202.7774.5.camel@scientia.net> Content-Type: multipart/signed; protocol="application/pkcs7-signature"; micalg=sha-512; boundary="------------ms050709040007000809000701" Sender: linux-btrfs-owner@vger.kernel.org List-ID: This is a cryptographically signed message in MIME format. --------------ms050709040007000809000701 Content-Type: text/plain; charset=utf-8; format=flowed Content-Transfer-Encoding: quoted-printable On 2015-11-07 10:30, Christoph Anton Mitterer wrote: > Hmm in fact it seems to be the kernel who wrongly, detects the type: > /sys/block/sdb/queue/rotational =3D 1 > or more like the USB/SATA bridge simply reports it wrong. > > Anyway, is there a way to override? Or will setting > /sys/block/sdb/queue/rotational =3D 0 give the expected behaviour? This is a common issue with many USB/SATA bridges (and also=20 device-mapper and MD devices), which don't properly query the attached=20 device and modify the properties they report to the host system. If you = have some way to reliably identify this particular device, you could add = a udev rule to automatically set it as non-rotational. You could also=20 do like you suggested and set it to non-rotational manually, although=20 for mkfs at least, it's quicker to just manually specify '-m single' on = the command-line (that's the only difference in mkfs behavior for a=20 SSD). Like Chris said in his reply though, everything other than using=20 single profile for metadata is done at mount time (if queue/rotational=20 is 0, then -o ssd does get added to the mount options automatically, but = it's a lot clearer to just specify the option yourself). --------------ms050709040007000809000701 Content-Type: application/pkcs7-signature; name="smime.p7s" Content-Transfer-Encoding: base64 Content-Disposition: attachment; filename="smime.p7s" Content-Description: S/MIME Cryptographic Signature MIAGCSqGSIb3DQEHAqCAMIACAQExDzANBglghkgBZQMEAgMFADCABgkqhkiG9w0BBwEAAKCC Brgwgga0MIIEnKADAgECAgMRLfgwDQYJKoZIhvcNAQENBQAweTEQMA4GA1UEChMHUm9vdCBD QTEeMBwGA1UECxMVaHR0cDovL3d3dy5jYWNlcnQub3JnMSIwIAYDVQQDExlDQSBDZXJ0IFNp Z25pbmcgQXV0aG9yaXR5MSEwHwYJKoZIhvcNAQkBFhJzdXBwb3J0QGNhY2VydC5vcmcwHhcN MTUwOTIxMTEzNTEzWhcNMTYwMzE5MTEzNTEzWjBjMRgwFgYDVQQDEw9DQWNlcnQgV29UIFVz ZXIxIzAhBgkqhkiG9w0BCQEWFGFoZmVycm9pbjdAZ21haWwuY29tMSIwIAYJKoZIhvcNAQkB FhNhaGVtbWVsZ0BvaGlvZ3QuY29tMIICIjANBgkqhkiG9w0BAQEFAAOCAg8AMIICCgKCAgEA nQ/81tq0QBQi5w316VsVNfjg6kVVIMx760TuwA1MUaNQgQ3NyUl+UyFtjhpkNwwChjgAqfGd LIMTHAdObcwGfzO5uI2o1a8MHVQna8FRsU3QGouysIOGQlX8jFYXMKPEdnlt0GoQcd+BtESr pivbGWUEkPs1CwM6WOrs+09bAJP3qzKIr0VxervFrzrC5Dg9Rf18r9WXHElBuWHg4GYHNJ2V Ab8iKc10h44FnqxZK8RDN8ts/xX93i9bIBmHnFfyNRfiOUtNVeynJbf6kVtdHP+CRBkXCNRZ qyQT7gbTGD24P92PS2UTmDfplSBcWcTn65o3xWfesbf02jF6PL3BCrVnDRI4RgYxG3zFBJuG qvMoEODLhHKSXPAyQhwZINigZNdw5G1NqjXqUw+lIqdQvoPijK9J3eijiakh9u2bjWOMaleI SMRR6XsdM2O5qun1dqOrCgRkM0XSNtBQ2JjY7CycIx+qifJWsRaYWZz0aQU4ZrtAI7gVhO9h pyNaAGjvm7PdjEBiXq57e4QcgpwzvNlv8pG1c/hnt0msfDWNJtl3b6elhQ2Pz4w/QnWifZ8E BrFEmjeeJa2dqjE3giPVWrsH+lOvQQONsYJOuVb8b0zao4vrWeGmW2q2e3pdv0Axzm/60cJQ haZUv8+JdX9ZzqxOm5w5eUQSclt84u+D+hsCAwEAAaOCAVkwggFVMAwGA1UdEwEB/wQCMAAw VgYJYIZIAYb4QgENBEkWR1RvIGdldCB5b3VyIG93biBjZXJ0aWZpY2F0ZSBmb3IgRlJFRSBo ZWFkIG92ZXIgdG8gaHR0cDovL3d3dy5DQWNlcnQub3JnMA4GA1UdDwEB/wQEAwIDqDBABgNV HSUEOTA3BggrBgEFBQcDBAYIKwYBBQUHAwIGCisGAQQBgjcKAwQGCisGAQQBgjcKAwMGCWCG SAGG+EIEATAyBggrBgEFBQcBAQQmMCQwIgYIKwYBBQUHMAGGFmh0dHA6Ly9vY3NwLmNhY2Vy dC5vcmcwMQYDVR0fBCowKDAmoCSgIoYgaHR0cDovL2NybC5jYWNlcnQub3JnL3Jldm9rZS5j cmwwNAYDVR0RBC0wK4EUYWhmZXJyb2luN0BnbWFpbC5jb22BE2FoZW1tZWxnQG9oaW9ndC5j b20wDQYJKoZIhvcNAQENBQADggIBADMnxtSLiIunh/TQcjnRdf63yf2D8jMtYUm4yDoCF++J jCXbPQBGrpCEHztlNSGIkF3PH7ohKZvlqF4XePWxpY9dkr/pNyCF1PRkwxUURqvuHXbu8Lwn 8D3U2HeOEU3KmrfEo65DcbanJCMTTW7+mU9lZICPP7ZA9/zB+L0Gm1UNFZ6AU50N/86vjQfY WgkCd6dZD4rQ5y8L+d/lRbJW7ZGEQw1bSFVTRpkxxDTOwXH4/GpQfnfqTAtQuJ1CsKT12e+H NSD/RUWGTr289dA3P4nunBlz7qfvKamxPymHeBEUcuICKkL9/OZrnuYnGROFwcdvfjGE5iLB kjp/ttrY4aaVW5EsLASNgiRmA6mbgEAMlw3RwVx0sVelbiIAJg9Twzk4Ct6U9uBKiJ8S0sS2 8RCSyTmCRhJs0vvva5W9QUFGmp5kyFQEoSfBRJlbZfGX2ehI2Hi3U2/PMUm2ONuQG1E+a0AP u7I0NJc/Xil7rqR0gdbfkbWp0a+8dAvaM6J00aIcNo+HkcQkUgtfrw+C2Oyl3q8IjivGXZqT 5UdGUb2KujLjqjG91Dun3/RJ/qgQlotH7WkVBs7YJVTCxfkdN36rToPcnMYOI30FWa0Q06gn F6gUv9/mo6riv3A5bem/BdbgaJoPnWQD9D8wSyci9G4LKC+HQAMdLmGoeZfpJzKHMYIE0TCC BM0CAQEwgYAweTEQMA4GA1UEChMHUm9vdCBDQTEeMBwGA1UECxMVaHR0cDovL3d3dy5jYWNl cnQub3JnMSIwIAYDVQQDExlDQSBDZXJ0IFNpZ25pbmcgQXV0aG9yaXR5MSEwHwYJKoZIhvcN AQkBFhJzdXBwb3J0QGNhY2VydC5vcmcCAxEt+DANBglghkgBZQMEAgMFAKCCAiEwGAYJKoZI hvcNAQkDMQsGCSqGSIb3DQEHATAcBgkqhkiG9w0BCQUxDxcNMTUxMTA5MTMzOTU2WjBPBgkq hkiG9w0BCQQxQgRAvxaS1MeUf3MbyfsThiefxRKVIeujdH6uAAGiKbQaeQVPgr2hAS8jRJ0x ph6awdx/wPEwQtgrgvM9WZhVNUKn6zBsBgkqhkiG9w0BCQ8xXzBdMAsGCWCGSAFlAwQBKjAL BglghkgBZQMEAQIwCgYIKoZIhvcNAwcwDgYIKoZIhvcNAwICAgCAMA0GCCqGSIb3DQMCAgFA MAcGBSsOAwIHMA0GCCqGSIb3DQMCAgEoMIGRBgkrBgEEAYI3EAQxgYMwgYAweTEQMA4GA1UE ChMHUm9vdCBDQTEeMBwGA1UECxMVaHR0cDovL3d3dy5jYWNlcnQub3JnMSIwIAYDVQQDExlD QSBDZXJ0IFNpZ25pbmcgQXV0aG9yaXR5MSEwHwYJKoZIhvcNAQkBFhJzdXBwb3J0QGNhY2Vy dC5vcmcCAxEt+DCBkwYLKoZIhvcNAQkQAgsxgYOggYAweTEQMA4GA1UEChMHUm9vdCBDQTEe MBwGA1UECxMVaHR0cDovL3d3dy5jYWNlcnQub3JnMSIwIAYDVQQDExlDQSBDZXJ0IFNpZ25p bmcgQXV0aG9yaXR5MSEwHwYJKoZIhvcNAQkBFhJzdXBwb3J0QGNhY2VydC5vcmcCAxEt+DAN BgkqhkiG9w0BAQEFAASCAgBOzMwwd85WctdboBNIjmxCBUDHguNcvhvUpXyBBquHAqwfcPvY dd8586D9zKgLlwliRnLwy2Humgr0SEYbH+KZxyQbe6aDSUFgh7QtwYBtUwbby1Wqbrma+J4W Rsxo9y1ylG2nAgRKIcMnGQcCRPBtGrr30Ey+K6aP5570SgP/M1XgUSROJ4bbZUh8t70AfP7E 25o1uqDh7+D6Iy+yFa5fpf/WY93dZ54TZewSjrB/6VV6hVbvNDMyDeY5k204/DvS1Xp5AupE D4cOVTC0im3Ua7KmGDljTFOZyBCAipmxsXfT0ZRgvYDfBzvIMrho698MwonqwQLrzbNO//E1 M2TqthygcQyLpIeBqA67pjr+TjKMuno0zJHl42vvdlNgbn3EipUj/o5Lfsbte2epPx/IGQC8 Oi5QCqyVFkqVgisNBnuR/ZCdV4au6GGcWeJCCXZsZdo1xsaYnCwQ7tQCCA7neRA2JaXSGTzx PmQQLW1WKJCDlSzC9nTSs0fhtccssXySyZqGYa2Zun3+PqhuZlCmqELteUjW0GTd2tNLSzPT SbHRHKF8fvbIj0lXMFZ//wM0oqNlipyRp4eyPSJ0SvZEe0+TbmNgGBXz5LpScTHfva2D/V23 MKVfRVvYGeN41ps7IZ2tsCZGVVToKGjbrDjoiv6Yb5IYYXxo0+rA9CMVugAAAAAAAA== --------------ms050709040007000809000701--