From nobody Mon Mar 18 08:59:24 2024 X-Original-To: freebsd-hardware@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 4Tz0gy5jwcz5F2vx for ; Mon, 18 Mar 2024 16:30:06 +0000 (UTC) (envelope-from naddy@mips.inka.de) Received: from mail.inka.de (mail.inka.de [IPv6:2a04:c9c7:0:1073:217:a4ff:fe3b:e77c]) (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 did not present a certificate) by mx1.freebsd.org (Postfix) with ESMTPS id 4Tz0gy25DZz4k3T for ; Mon, 18 Mar 2024 16:30:06 +0000 (UTC) (envelope-from naddy@mips.inka.de) Authentication-Results: mx1.freebsd.org; dkim=none; dmarc=none; spf=pass (mx1.freebsd.org: domain of naddy@mips.inka.de designates 2a04:c9c7:0:1073:217:a4ff:fe3b:e77c as permitted sender) smtp.mailfrom=naddy@mips.inka.de Received: from mips.inka.de (naddy@[127.0.0.1]) by mail.inka.de with uucp (rmailwrap 0.5) id 1rmFsC-003DWM-IM; Mon, 18 Mar 2024 17:30:04 +0100 Received: from lorvorc.mips.inka.de (localhost [127.0.0.1]) by lorvorc.mips.inka.de (8.18.1/8.18.1) with ESMTP id 42IGTNnA033240; Mon, 18 Mar 2024 17:29:23 +0100 (CET) (envelope-from naddy@lorvorc.mips.inka.de) Received: (from naddy@localhost) by lorvorc.mips.inka.de (8.18.1/8.18.1/Submit) id 42IGTNZn033239; Mon, 18 Mar 2024 17:29:23 +0100 (CET) (envelope-from naddy) Resent-From: Christian Weisgerber Resent-Date: Mon, 18 Mar 2024 17:29:23 +0100 Resent-Message-ID: Resent-To: mike@sentex.net, freebsd-hardware@freebsd.org Date: Mon, 18 Mar 2024 09:59:24 +0100 From: Christian Weisgerber To: mike tancsa Cc: freebsd-hardware@freebsd.org Subject: Re: WD Blue 510 SSD and strange write performance Message-ID: References: List-Id: General discussion of FreeBSD hardware List-Archive: https://lists.freebsd.org/archives/freebsd-hardware List-Help: List-Post: List-Subscribe: List-Unsubscribe: Sender: owner-freebsd-hardware@freebsd.org MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: X-Spamd-Bar: --- X-Spamd-Result: default: False [-3.18 / 15.00]; NEURAL_HAM_LONG(-1.00)[-1.000]; NEURAL_HAM_MEDIUM(-0.95)[-0.948]; NEURAL_HAM_SHORT(-0.93)[-0.932]; R_SPF_ALLOW(-0.20)[+mx]; MIME_GOOD(-0.10)[text/plain]; ARC_NA(0.00)[]; FROM_HAS_DN(0.00)[]; ASN(0.00)[asn:202113, ipnet:2a04:c9c7::/32, country:DE]; MIME_TRACE(0.00)[0:+]; FREEFALL_USER(0.00)[naddy]; TO_DN_SOME(0.00)[]; MID_RHS_MATCH_FROMTLD(0.00)[]; RCPT_COUNT_TWO(0.00)[2]; MLMMJ_DEST(0.00)[freebsd-hardware@freebsd.org]; TO_MATCH_ENVRCPT_SOME(0.00)[]; FROM_EQ_ENVFROM(0.00)[]; R_DKIM_NA(0.00)[]; RCVD_TLS_LAST(0.00)[]; RCVD_COUNT_THREE(0.00)[3]; DMARC_NA(0.00)[inka.de]; MISSING_XM_UA(0.00)[] X-Rspamd-Queue-Id: 4Tz0gy25DZz4k3T mike tancsa: > This might be more of a hardware question than anything, but I noticed the > drive is fairly fast on initial writes, but dramatically slows down over > time with a consistent write. > If I wait for 2min, it seems to be back to normal Sounds like normal behavior for a drive that runs part of its flash as a fast cache in SLC mode, the rest as much slower TLC/QLC memory. -- Christian "naddy" Weisgerber naddy@mips.inka.de