From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from smtp.gentoo.org (woodpecker.gentoo.org [140.211.166.183]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (4096 bits) server-digest SHA256) (No client certificate requested) by finch.gentoo.org (Postfix) with ESMTPS id E879F1582EF for ; Thu, 20 Feb 2025 23:45:10 +0000 (UTC) Received: from lists.gentoo.org (bobolink.gentoo.org [140.211.166.189]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (4096 bits)) (No client certificate requested) (Authenticated sender: relay-lists.gentoo.org@gentoo.org) by smtp.gentoo.org (Postfix) with ESMTPSA id CD8F6343128 for ; Thu, 20 Feb 2025 23:45:10 +0000 (UTC) Received: from bobolink.gentoo.org (localhost [127.0.0.1]) by bobolink.gentoo.org (Postfix) with ESMTP id 768E411047D; Thu, 20 Feb 2025 23:44:03 +0000 (UTC) Received: from ciao.gmane.io (ciao.gmane.io [116.202.254.214]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange ECDHE (prime256v1) server-signature RSA-PSS (4096 bits) server-digest SHA256) (No client certificate requested) by bobolink.gentoo.org (Postfix) with ESMTPS id 6EAF71102A2 for ; Thu, 20 Feb 2025 23:44:02 +0000 (UTC) Received: from list by ciao.gmane.io with local (Exim 4.92) (envelope-from ) id 1tlGD2-0009LN-Iv for gentoo-user@lists.gentoo.org; Fri, 21 Feb 2025 00:44:00 +0100 X-Injected-Via-Gmane: http://gmane.org/ To: gentoo-user@lists.gentoo.org From: Grant Edwards Subject: [gentoo-user] Re: problem formatting new 256 GB USB stick : glances at gparted Date: Thu, 20 Feb 2025 23:43:55 -0000 (UTC) Message-ID: References: <3140915.CbtlEUcBR6@rogueboard> <2658421.Lt9SDvczpP@rogueboard> Precedence: bulk List-Post: List-Help: List-Unsubscribe: List-Subscribe: List-Id: Gentoo Linux mail X-BeenThere: gentoo-user@lists.gentoo.org Reply-to: gentoo-user@lists.gentoo.org X-Auto-Response-Suppress: DR, RN, NRN, OOF, AutoReply Mime-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit User-Agent: slrn/1.0.3 (Linux) X-Archives-Salt: 9285b5ef-23d6-4c8a-82ff-4cb1c7211fb4 X-Archives-Hash: fdbcb9d55ee44f73449929978cc5a9f1 On 2025-02-20, Frank Steinmetzger wrote: > Another thing to consider: don’t put it into the safe for a year without > powering it up. As was explained in a previous mail, QLC uses sixteen > different levels of charge inside one single flash cell. The chance of a bit > flip increases the longer the SSD is powerless and charge slowly (very > slowly) dissipates. It’s hard to find exact numbers, and it’s more of a > statistical question. Could be a research topic for a slow Sunday. ;-) > Also, don’t you live in a hot area? > > I don’t know if an SSD does a re-charge regularly by itself, or whether you > need to actually read out the cells for the controller to notice any issues. > This may be another good research topic. According to some sources I've read, (at least some) flash controllers do automatic refresh cycles in the background. I've no clue how long a complete device refresh cycle would take for any particular device, or how long between refresh cycles you would want to tolerate. -- Grant