From owner-freebsd-questions@freebsd.org Fri Jun 12 06:55:01 2020 Return-Path: Delivered-To: freebsd-questions@mailman.nyi.freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2610:1c1:1:606c::19:1]) by mailman.nyi.freebsd.org (Postfix) with ESMTP id D919F3311DB for ; Fri, 12 Jun 2020 06:55:01 +0000 (UTC) (envelope-from dpchrist@holgerdanske.com) Received: from holgerdanske.com (holgerdanske.com [184.105.128.27]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange ECDHE (P-256) server-signature RSA-PSS (4096 bits) server-digest SHA256 client-signature RSA-PSS (2048 bits) client-digest SHA256) (Client CN "holgerdanske.com", Issuer "holgerdanske.com" (not verified)) by mx1.freebsd.org (Postfix) with ESMTPS id 49js105MHrz42tw for ; Fri, 12 Jun 2020 06:55:00 +0000 (UTC) (envelope-from dpchrist@holgerdanske.com) Received: from 99.100.19.101 ([99.100.19.101]) by holgerdanske.com with ESMTPSA (TLS_AES_128_GCM_SHA256:TLSv1.3:Kx=any:Au=any:Enc=AESGCM(128):Mac=AEAD) (SMTP-AUTH username dpchrist@holgerdanske.com, mechanism PLAIN) for ; Thu, 11 Jun 2020 23:54:56 -0700 Subject: Re: Bug or Feature? -- Disappearing /dev/ nodes after mount To: freebsd-questions@freebsd.org References: <86546.1591917249@segfault.tristatelogic.com> <20200612082224.9c1e3797.freebsd@edvax.de> From: David Christensen Message-ID: <01fb8c1e-a9e8-816e-a2ef-2c45c721687c@holgerdanske.com> Date: Thu, 11 Jun 2020 23:54:55 -0700 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:68.0) Gecko/20100101 Thunderbird/68.8.0 MIME-Version: 1.0 In-Reply-To: <20200612082224.9c1e3797.freebsd@edvax.de> Content-Type: text/plain; charset=utf-8; format=flowed Content-Language: en-US Content-Transfer-Encoding: 7bit X-Rspamd-Queue-Id: 49js105MHrz42tw X-Spamd-Bar: ++ Authentication-Results: mx1.freebsd.org; dkim=none; dmarc=none; spf=none (mx1.freebsd.org: domain of dpchrist@holgerdanske.com has no SPF policy when checking 184.105.128.27) smtp.mailfrom=dpchrist@holgerdanske.com X-Spamd-Result: default: False [2.89 / 15.00]; RCVD_TLS_ALL(0.00)[]; RCVD_VIA_SMTP_AUTH(0.00)[]; MID_RHS_MATCH_FROM(0.00)[]; FROM_HAS_DN(0.00)[]; TO_MATCH_ENVRCPT_ALL(0.00)[]; NEURAL_SPAM_SHORT(0.35)[0.353]; MIME_GOOD(-0.10)[text/plain]; PREVIOUSLY_DELIVERED(0.00)[freebsd-questions@freebsd.org]; TO_DN_NONE(0.00)[]; AUTH_NA(1.00)[]; RCPT_COUNT_ONE(0.00)[1]; NEURAL_SPAM_MEDIUM(0.88)[0.878]; ARC_NA(0.00)[]; NEURAL_SPAM_LONG(0.76)[0.758]; RCVD_IN_DNSWL_NONE(0.00)[184.105.128.27:from]; R_SPF_NA(0.00)[no SPF record]; DMARC_NA(0.00)[holgerdanske.com]; FROM_EQ_ENVFROM(0.00)[]; R_DKIM_NA(0.00)[]; MIME_TRACE(0.00)[0:+]; ASN(0.00)[asn:6939, ipnet:184.104.0.0/15, country:US]; RCVD_COUNT_TWO(0.00)[2]; SUBJECT_HAS_QUESTION(0.00)[] X-BeenThere: freebsd-questions@freebsd.org X-Mailman-Version: 2.1.33 Precedence: list List-Id: User questions List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Fri, 12 Jun 2020 06:55:01 -0000 On 2020-06-11 23:22, Polytropon wrote: > On Thu, 11 Jun 2020 16:14:09 -0700, Ronald F. Guilmette wrote: >> Interestingly, as I have just learned, when and if the user subesquently >> mounts the relevant partition, the corresponding `/dev/gpt/partname' node >> will, rather unexpectedly and magically, disappear until such time as the >> relevant partition is unmounted, whereupon it will reappear. >> 1) Is this behavior documented somewhere that I just failed to look at? >> If so, where? > > Interesting question - I would be interested in that, too. See Lucas, AF3E, p. 214 "GEOM Withering" [1]. David [1] https://mwl.io/nonfiction/os#af3e