Date: Thu, 13 Jun 2019 13:02:48 +0200 From: peter.blok@bsd4all.org To: freebsd-scsi@freebsd.org Subject: Bad SSD drive - what happens with unreadable data Message-ID: <C13683A4-B5CB-43B9-84EC-1E18BD88D63E@bsd4all.org>
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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
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