From owner-freebsd-hackers@freebsd.org Sat Dec 1 00:32:27 2018 Return-Path: Delivered-To: freebsd-hackers@mailman.ysv.freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2610:1c1:1:606c::19:1]) by mailman.ysv.freebsd.org (Postfix) with ESMTP id 5524811548DD for ; Sat, 1 Dec 2018 00:32:27 +0000 (UTC) (envelope-from ish@amail.plala.or.jp) Received: from mailman.ysv.freebsd.org (mailman.ysv.freebsd.org [IPv6:2001:1900:2254:206a::50:5]) by mx1.freebsd.org (Postfix) with ESMTP id B7B7C7E4C5 for ; Sat, 1 Dec 2018 00:32:26 +0000 (UTC) (envelope-from ish@amail.plala.or.jp) Received: by mailman.ysv.freebsd.org (Postfix) id 7AC9A11548DC; Sat, 1 Dec 2018 00:32:26 +0000 (UTC) Delivered-To: hackers@mailman.ysv.freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2610:1c1:1:606c::19:1]) by mailman.ysv.freebsd.org (Postfix) with ESMTP id 6768B11548DB for ; Sat, 1 Dec 2018 00:32:26 +0000 (UTC) (envelope-from ish@amail.plala.or.jp) Received: from msc13.plala.or.jp (msc13.plala.or.jp [60.36.166.23]) by mx1.freebsd.org (Postfix) with ESMTP id E40C47E4BF for ; Sat, 1 Dec 2018 00:32:24 +0000 (UTC) (envelope-from ish@amail.plala.or.jp) Received: from localhost ([2400:4050:9320:7a00::8]) by msc13.plala.or.jp with ESMTP id <20181201003222.LZZY25242.msc13.plala.or.jp@localhost> for ; Sat, 1 Dec 2018 09:32:22 +0900 Date: Sat, 01 Dec 2018 09:31:53 +0900 (JST) Message-Id: <20181201.093153.893601099798031027.ish@amail.plala.or.jp> To: hackers@freebsd.org Subject: Re: How to use trim command ? From: Masachika ISHIZUKA In-Reply-To: <7e69211c-6ffb-6155-b17a-a845c0b3586d@grosbein.net> References: <20181201.011411.2100982142219259108.ish@amail.plala.or.jp> <7e69211c-6ffb-6155-b17a-a845c0b3586d@grosbein.net> X-Mailer: Mew version 6.8 on Emacs 26.1 Mime-Version: 1.0 Content-Type: Text/Plain; charset=us-ascii Content-Transfer-Encoding: 7bit X-VirusScan: Outbound; mvir-ac13; Sat, 1 Dec 2018 09:32:22 +0900 X-Rspamd-Queue-Id: B7B7C7E4C5 X-Spamd-Result: default: False [-4.30 / 15.00]; ARC_NA(0.00)[]; FORGED_RECIPIENTS_FORWARDING(0.00)[]; RCVD_COUNT_FIVE(0.00)[5]; NEURAL_HAM_MEDIUM(-1.00)[-1.000,0]; FROM_HAS_DN(0.00)[]; FORWARDED(0.00)[hackers@mailman.ysv.freebsd.org]; MV_CASE(0.50)[]; NEURAL_HAM_LONG(-1.00)[-0.999,0]; MIME_GOOD(-0.10)[text/plain]; TO_DN_NONE(0.00)[]; DMARC_NA(0.00)[plala.or.jp]; R_SPF_SOFTFAIL(0.00)[~all]; RCPT_COUNT_ONE(0.00)[1]; SPF_FAIL_FORWARDING(0.00)[]; IP_SCORE(-3.60)[ip: (-9.87), ipnet: 2001:1900:2254::/48(-4.63), asn: 10310(-3.43), country: US(-0.09)]; RCVD_IN_DNSWL_MED(-0.20)[5.0.0.0.0.5.0.0.0.0.0.0.0.0.0.0.a.6.0.2.4.5.2.2.0.0.9.1.1.0.0.2.list.dnswl.org : 127.0.9.2]; MX_GOOD(-0.01)[cached: mx.plala.or.jp]; MID_CONTAINS_FROM(1.00)[]; NEURAL_HAM_SHORT(-0.99)[-0.990,0]; RCVD_NO_TLS_LAST(0.10)[]; FROM_EQ_ENVFROM(0.00)[]; R_DKIM_NA(0.00)[]; SUBJECT_ENDS_QUESTION(1.00)[]; ASN(0.00)[asn:10310, ipnet:2001:1900:2254::/48, country:US]; FORGED_RECIPIENTS(0.00)[hackers@freebsd.org,freebsd-hackers@freebsd.org] X-Rspamd-Server: mx1.freebsd.org X-BeenThere: freebsd-hackers@freebsd.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Technical Discussions relating to FreeBSD List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Sat, 01 Dec 2018 00:32:27 -0000 >> I'm using FreeBSD 13.0-CURRENT r341327. >> I want to use trim command. > > It seems this partition is in use (mounted?) and GEOM won't allow to write > to opened partition, you need to close it first (unmount). > Be warned: trim will destroy all data in the partition. Thank you for reply. I misunderstood trim was equivalent to fstrim in linux. I undotstood that the trim command is the SSD bulk erase tool. -- Masachika ISHIZUKA