From owner-freebsd-questions@freebsd.org Thu Oct 15 13:50:03 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 7970343F49A for ; Thu, 15 Oct 2020 13:50:03 +0000 (UTC) (envelope-from galtsev@kicp.uchicago.edu) Received: from kicp.uchicago.edu (kicp.uchicago.edu [128.135.20.70]) by mx1.freebsd.org (Postfix) with ESMTP id 4CBrJB5Fcjz4WG8 for ; Thu, 15 Oct 2020 13:50:02 +0000 (UTC) (envelope-from galtsev@kicp.uchicago.edu) Received: from ray (unknown [172.58.140.242]) (Authenticated sender: galtsev) by kicp.uchicago.edu (Postfix) with ESMTPSA id 5162D4E65E for ; Thu, 15 Oct 2020 08:50:02 -0500 (CDT) Date: Thu, 15 Oct 2020 08:50:00 -0500 From: Valeri Galtsev To: freebsd-questions@freebsd.org Subject: Re: A couple of questions about SSDs Message-ID: <20201015085000.27c523b0@ray> In-Reply-To: References: <20201014121442.662e71c4@archlinux> <20201014174749.6df7572a.freebsd@edvax.de> <20201014202206.7c7886d0@archlinux> X-Mailer: Claws Mail 3.17.5 (GTK+ 2.24.32; x86_64-pc-linux-gnu) MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: quoted-printable X-Rspamd-Queue-Id: 4CBrJB5Fcjz4WG8 X-Spamd-Bar: +++++++ Authentication-Results: mx1.freebsd.org; dkim=none; dmarc=fail reason="No valid SPF, No valid DKIM" header.from=uchicago.edu (policy=none); spf=none (mx1.freebsd.org: domain of galtsev@kicp.uchicago.edu has no SPF policy when checking 128.135.20.70) smtp.mailfrom=galtsev@kicp.uchicago.edu X-Spamd-Result: default: False [7.39 / 15.00]; RCVD_VIA_SMTP_AUTH(0.00)[]; ARC_NA(0.00)[]; RECEIVED_SPAMHAUS_XBL(5.00)[172.58.140.242:received]; RECEIVED_SPAMHAUS_PBL(0.00)[172.58.140.242:received]; FROM_HAS_DN(0.00)[]; TO_MATCH_ENVRCPT_ALL(0.00)[]; GREYLIST(0.00)[pass,meta]; MIME_GOOD(-0.10)[text/plain]; TO_DN_NONE(0.00)[]; PREVIOUSLY_DELIVERED(0.00)[freebsd-questions@freebsd.org]; NEURAL_SPAM_MEDIUM(0.86)[0.863]; RCPT_COUNT_ONE(0.00)[1]; MID_RHS_NOT_FQDN(0.50)[]; NEURAL_SPAM_SHORT(0.11)[0.105]; NEURAL_SPAM_LONG(0.82)[0.819]; R_SPF_NA(0.00)[no SPF record]; RCVD_NO_TLS_LAST(0.10)[]; FROM_EQ_ENVFROM(0.00)[]; R_DKIM_NA(0.00)[]; MIME_TRACE(0.00)[0:+]; ASN(0.00)[asn:160, ipnet:128.135.0.0/16, country:US]; RCVD_COUNT_TWO(0.00)[2]; MAILMAN_DEST(0.00)[freebsd-questions]; DMARC_POLICY_SOFTFAIL(0.10)[uchicago.edu : No valid SPF, No valid DKIM,none] X-Spam: Yes 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: Thu, 15 Oct 2020 13:50:03 -0000 On Thu, 15 Oct 2020 08:26:39 +0200 Andrea Venturoli wrote: > On 10/14/20 8:22 PM, Ralf Mardorf wrote: >=20 > > In my desktop PC are 5 SSDs. Four are connected to the mobos SATA 3 > > connectors and one is connected to a SATA 2 connector. Four are > > 223.57 GiB sized and one is 447.13 GiB sized. I'm to lazy to check > > how old each of them is, but IIRC the oldest is around 3=C2=BD years old > > and the vendor's software mentions that the "health" is at 64%, the > > system drive is one of the newer SSDs, maybe around 2 years old, > > "health" 57%. =20 >=20 > So your SSDs seems to last 4-6 years. >=20 >=20 >=20 > > In my experiences HDDs last for around 2 years, if you turn the > > computer on and off very often and for around 7 years, if the > > computer runs more or less 24/7. =20 >=20 > I'm currently typing on a box running on 13 years old HDs. > They've been used on a server (so always on) for maybe 5-6 years, > then demoted to a desktop machine and they've been cycle-powered > daily for at least other 6. > I even have older, still working, rust around. >=20 I first must confess: I always was very picky about choice of hard drives. And I did manage to stick with most reliable ones. That said, I do have machines in the server room running for 10 years, always up, except for occasional reboot (Linux kernel or glibc update...). All still with original drives. Of each 10-20 drives during this time only 1-2 failed (or exhausted badblock reallocation table) and have been replaced. Incidentally, always up is the least demanding use of spinning drive. Well manufactured that is, and positioned horizontally (with axis of platters vertical). If the above observed, the limiting factor will be the number of spin downs or power offs when spring loaded arm let loose and hits the post being stopped at "parking track". SSDs have their use when you need really high speed (or reading), so we still use them for the purpose, even realizing they may loose in durability department. Valeri > When an HD gets to small/slow for its purpose, I replace it with a=20 > bigger shinier one, but I just move the old one to a less demanding > use, backups/archive being the lower step in their life. >=20 >=20 >=20 > > However, my guess is, due to a lack of experiences with SSDs, that > > they last for as long as HDDs do last. =20 >=20 > Seems not, then. >=20 >=20 >=20 > bye & Thanks > av. > _______________________________________________ > freebsd-questions@freebsd.org mailing list > https://lists.freebsd.org/mailman/listinfo/freebsd-questions > To unsubscribe, send any mail to > "freebsd-questions-unsubscribe@freebsd.org" --=20 ++++++++++++++++++++++++++++++++++++++++ Valeri Galtsev Sr System Administrator Department of Astronomy and Astrophysics Kavli Institute for Cosmological Physics University of Chicago Phone: 773-702-4247 ++++++++++++++++++++++++++++++++++++++++