From nobody Sun May 30 23:54:29 2021 X-Original-To: freebsd-arm@mlmmj.nyi.freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2610:1c1:1:606c::19:1]) by mlmmj.nyi.freebsd.org (Postfix) with ESMTP id 5F7BABF9066 for ; Sun, 30 May 2021 23:54:34 +0000 (UTC) (envelope-from freebsd@dsllsn.net) Received: from mail.disillusion.net (mail.disillusion.net [96.126.127.161]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (4096 bits) server-digest SHA512 client-signature RSA-PSS (4096 bits) client-digest SHA256) (Client CN "mail.disillusion.net", Issuer "R3" (verified OK)) by mx1.freebsd.org (Postfix) with ESMTPS id 4FtZyy1Vhnz4knt for ; Sun, 30 May 2021 23:54:33 +0000 (UTC) (envelope-from freebsd@dsllsn.net) Received: from roast.disillusion.net (localhost [127.0.0.1]) by roast.disillusion.net (OpenSMTPD) with ESMTP id e79419a7; Sun, 30 May 2021 18:54:29 -0500 (CDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed; d=dsllsn.net; h= content-type:mime-version:subject:from:in-reply-to:date:cc :content-transfer-encoding:message-id:references:to; s=drip; bh= KqIxGCEqftRhFOoBTOBQ0HPo7pzwnUdxONQ3Og2OuAs=; b=tLs+CFJrf2n+KdsG wz1lPExSOuoI5Terj/offnnVLv14XoEQxC3A91Jok4Ff+iwpHcfW0QnICtiuQlZs iGUyUW+VZLCBHcAYRcyfmE7zfXPk3sDnB1mkG6Z1FK2T35wUaEwNuP/YThJ244Jo DWdGouICuCnmbHV/D3Wy2ADoWuc= DomainKey-Signature: a=rsa-sha1; c=nofws; d=dsllsn.net; h=content-type :mime-version:subject:from:in-reply-to:date:cc :content-transfer-encoding:message-id:references:to; q=dns; s= drip; b=MquOvvsuXvMtaPkelTJ+b3Bg+Q61wFk73Z9owmUDIih/HohwRr7c0iXG cWLPY4wk6sOI/W56VspME148WlPhznkCS68/V78wnwwW30Z99N7wkpRw4Mm4m3H1 HCaItfnrsCXMVk9lR0CQPUS9l+vV/ak4P+FIHdY7F6zxy8WPUVU= Received: by mail.disillusion.net (OpenSMTPD) with ESMTPSA id b4b61943 (TLSv1.2:ECDHE-RSA-AES256-GCM-SHA384:256:NO); Sun, 30 May 2021 18:54:29 -0500 (CDT) Content-Type: text/plain; charset=utf-8 List-Id: Porting FreeBSD to ARM processors List-Archive: https://lists.freebsd.org/archives/freebsd-arm List-Help: List-Post: List-Subscribe: List-Unsubscribe: Sender: owner-freebsd-arm@freebsd.org Mime-Version: 1.0 (Mac OS X Mail 13.4 \(3608.120.23.2.6\)) Subject: Re: Boot from USB on RPi4 8GB? In-Reply-To: Date: Sun, 30 May 2021 18:54:29 -0500 Cc: freebsd-arm Content-Transfer-Encoding: quoted-printable Message-Id: References: <4F3EE8D2-649B-4522-AD5A-7C308291802F@dsllsn.net> <43FAEEAC-EE36-4810-88AA-FF82AFBCC128@yahoo.com> <2F58272B-BD9C-464B-9A98-BF638971BA86@dsllsn.net> To: Mark Millard X-Mailer: Apple Mail (2.3608.120.23.2.6) X-Rspamd-Queue-Id: 4FtZyy1Vhnz4knt X-Spamd-Bar: ---- Authentication-Results: mx1.freebsd.org; none X-Spamd-Result: default: False [-4.00 / 15.00]; REPLY(-4.00)[] Reply-To: freebsd@dsllsn.net From: William Carson via freebsd-arm X-Original-From: William Carson X-ThisMailContainsUnwantedMimeParts: N > On May 30, 2021, at 4:08 PM, Mark Millard wrote: >=20 > On 2021-May-30, at 13:50, Mark Millard via freebsd-arm wrote: >=20 >> On 2021-May-30, at 10:59, William Carson via freebsd-arm wrote: >>=20 >>>> . . . >>>> I use a USB3 SSD that has small enough power requirements >>>> to not require a powered hub. (I also use a 5.1V 3.5A >>>> power supply as part of that context.) I've never tried >>>> spinning rust or higher powered USB3 media. >>=20 >> I view the power supply that I use as just giving a little >> more margin, not as a way to increase what the devices >> total to. >>=20 >>> . . . I'm not sure what's considered "high powered" but the Samsung = tech specs say this particular model uses 5.7 W on average and 10.0 W = maximum. But it does seem curious that the Raspberry PI OS will boot = this disk without issue, so I don't think it's the drive. I also tried a = Samsung 950 PRO using a different enclosure (QNINE NVME Enclosure, M.2 = PCIe SSD (M Key) to USB 3.0 External Case), but it behaved the same. >> . . . >>=20 >> Then you need to use a powered hub for that device. >=20 > I should have just referred to independent power. You > had written: >=20 > QUOTE > I'm trying to use a SAMSUNG (MZ-V7E500BW) 970 EVO SSD 500GB - M.2 = NVMe, attached via the Geekworm X872 M.2 NVMe 2280/2260/2242/2230 SSD = Expansion Board. > END QUOTE >=20 > = https://geekworm.com/products/raspberry-pi-4-x872-m-2-nvme-2280-2260-2242-= 2230-ssd-expansion-board >=20 > shows that it has its own power connector and has an image > that says "please power x872 via DC Jack of XH2.54 connector > if SSD is not recognized or low power". Later text on the > page says: >=20 > QUOTE > Specifications: > Power Supply > =E2=80=A2 5Vdc +/-5% , Powered by Raspberry Pi USB port > =E2=80=A2 5Vdc via DC power jack or XH2.5 connector, Extra power = for the SSD > END QUOTE >=20 > So, if I gather right, you need to connect a power > supply to the X872 and another to the RPi4B. >=20 > Another image says "Note: NOT recommended to use SAMSUNG SSD, > if use SAMSUNG SSD, please close WiFi". Later text on the page > says the same. A-ha, indeed. I just noticed that as well. I've gone ahead and ordered a = supplementary power supply and a lower-power NVMe to do more testing. = I'll send an update once I've received and tested them. Thank you for hopefully pointing me in the right direction. > = https://www.raspberrypi.org/documentation/hardware/raspberrypi/power/READM= E.md >> lists: >>=20 >> "Maximum total USB peripheral current draw" as: 1.2A , >> which at 5.1V is 6W. >>=20 >> That figure is the total for all USB devices attached >> that are not powered independently. >>=20 >> That document also says that a 5.1V supply is required, >> not 5V. >>=20 >> The power supply that the RPi folks supply is 5.1V @ 3A >> or 15.3W. Even the 5.1V 3.5A power supply that I use >> only multiplies out to 17.85W. >=20 > =3D=3D=3D > Mark Millard > marklmi at yahoo.com > ( dsl-only.net went > away in early 2018-Mar) >=20 >=20 >=20 > =3D=3D=3D > Mark Millard > marklmi at yahoo.com > ( dsl-only.net went > away in early 2018-Mar) >=20