From owner-freebsd-scsi@freebsd.org Thu Jun 13 11:03:01 2019 Return-Path: Delivered-To: freebsd-scsi@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 A898315AE04D for ; Thu, 13 Jun 2019 11:03:01 +0000 (UTC) (envelope-from peter.blok@bsd4all.org) Received: from smtpq6.tb.mail.iss.as9143.net (smtpq6.tb.mail.iss.as9143.net [212.54.42.169]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (Client did not present a certificate) by mx1.freebsd.org (Postfix) with ESMTPS id F09C08010D for ; Thu, 13 Jun 2019 11:02:59 +0000 (UTC) (envelope-from peter.blok@bsd4all.org) Received: from [212.54.42.136] (helo=smtp12.tb.mail.iss.as9143.net) by smtpq6.tb.mail.iss.as9143.net with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1hbNVJ-0006tv-Nt for freebsd-scsi@freebsd.org; Thu, 13 Jun 2019 13:02:49 +0200 Received: from 94-209-122-217.cable.dynamic.v4.ziggo.nl ([94.209.122.217] helo=wan0.bsd4all.org) by smtp12.tb.mail.iss.as9143.net with esmtp (Exim 4.90_1) (envelope-from ) id 1hbNVJ-0006Dz-KN for freebsd-scsi@freebsd.org; Thu, 13 Jun 2019 13:02:49 +0200 Received: from newnas (localhost [127.0.0.1]) by wan0.bsd4all.org (Postfix) with ESMTP id 3D4C2188 for ; Thu, 13 Jun 2019 13:02:49 +0200 (CEST) X-Virus-Scanned: amavisd-new at bsd4all.org Received: from wan0.bsd4all.org ([127.0.0.1]) by newnas (newnas.bsd4all.org [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id qz0Brtu5QdVk for ; Thu, 13 Jun 2019 13:02:48 +0200 (CEST) Received: from [192.168.1.65] (unknown [192.168.1.65]) by wan0.bsd4all.org (Postfix) with ESMTPSA id D3B19181 for ; Thu, 13 Jun 2019 13:02:48 +0200 (CEST) From: peter.blok@bsd4all.org Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: quoted-printable Mime-Version: 1.0 (Mac OS X Mail 12.4 \(3445.104.11\)) Subject: Bad SSD drive - what happens with unreadable data Message-Id: Date: Thu, 13 Jun 2019 13:02:48 +0200 To: freebsd-scsi@freebsd.org X-Mailer: Apple Mail (2.3445.104.11) X-SourceIP: 94.209.122.217 X-Ziggo-spambar: / X-Ziggo-spamscore: 0.0 X-Ziggo-spamreport: CMAE Analysis: v=2.3 cv=Zo2T1OzG c=1 sm=1 tr=0 a=0XONDDbZk2SpjknwKA3Xxg==:17 a=IkcTkHD0fZMA:10 a=dq6fvYVFJ5YA:10 a=ASqCesjh3PPKGcoGyAIA:9 a=QEXdDO2ut3YA:10 X-Ziggo-Spam-Status: No X-Spam-Status: No X-Spam-Flag: No X-Rspamd-Queue-Id: F09C08010D X-Spamd-Bar: --- Authentication-Results: mx1.freebsd.org; spf=pass (mx1.freebsd.org: domain of peter.blok@bsd4all.org designates 212.54.42.169 as permitted sender) smtp.mailfrom=peter.blok@bsd4all.org X-Spamd-Result: default: False [-3.36 / 15.00]; ARC_NA(0.00)[]; RCVD_VIA_SMTP_AUTH(0.00)[]; RCVD_COUNT_FIVE(0.00)[6]; NEURAL_HAM_MEDIUM(-1.00)[-1.000,0]; MIME_TRACE(0.00)[0:+]; R_SPF_ALLOW(-0.20)[+a:smtp.ziggo.nl/16]; MV_CASE(0.50)[]; MIME_GOOD(-0.10)[text/plain]; PREVIOUSLY_DELIVERED(0.00)[freebsd-scsi@freebsd.org]; TO_DN_NONE(0.00)[]; RCPT_COUNT_ONE(0.00)[1]; NEURAL_HAM_LONG(-1.00)[-1.000,0]; RCVD_TLS_LAST(0.00)[]; TO_MATCH_ENVRCPT_ALL(0.00)[]; MX_GOOD(-0.01)[smtp.bsd4all.org]; NEURAL_HAM_SHORT(-0.67)[-0.671,0]; FROM_NO_DN(0.00)[]; IP_SCORE(-0.78)[ipnet: 212.54.32.0/20(-3.10), asn: 33915(-0.81), country: NL(0.01)]; DMARC_NA(0.00)[bsd4all.org]; FROM_EQ_ENVFROM(0.00)[]; RCVD_IN_DNSWL_LOW(-0.10)[169.42.54.212.list.dnswl.org : 127.0.5.1]; R_DKIM_NA(0.00)[]; ASN(0.00)[asn:33915, ipnet:212.54.32.0/20, country:NL]; MID_RHS_MATCH_FROM(0.00)[]; RECEIVED_SPAMHAUS_PBL(0.00)[217.122.209.94.zen.spamhaus.org : 127.0.0.11] X-BeenThere: freebsd-scsi@freebsd.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: SCSI subsystem List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Thu, 13 Jun 2019 11:03:01 -0000 Hi, I have a bad SSD drive. If I read it with dd and conv=3Dnoerror, what = happens with the unreadable areas? Does it fill with zeroes, or does the = driver still copy what it was able to read? I=E2=80=99m getting ATA status 51 back, many blocks in a row. Followed = by chunks of readable data, followed by unreadable data. Is there a modepage or something else to tell the drive to pass on the = bad data? Any other ideas? Peter