lists  /  announce  owl-users  owl-dev  john-users  john-dev  passwdqc-users  yescrypt  popa3d-users  /  oss-security  kernel-hardening  musl  sabotage  tlsify  passwords  /  crypt-dev  xvendor  /  Bugtraq  Full-Disclosure  linux-kernel  linux-netdev  linux-ext4  linux-hardening  PHC 
Open Source and information security mailing list archives
Hash Suite: Windows password security audit tool. GUI, reports in PDF.
[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]
Date:   Sat, 4 Jul 2020 13:49:17 +0200
From:   Pavel Machek <>
To:     David Laight <David.Laight@...LAB.COM>
Cc:     Ming Lei <>,
        Henrique de Moraes Holschuh <>,
        Damien Le Moal <>,
        Simon Arlott <>,
        "James E.J. Bottomley" <>,
        "Martin K. Petersen" <>,
        Jonathan Corbet <>,
        Linux Kernel Mailing List <>,
        "" <>,
        "" <>
Subject: Re: [PATCH] scsi: sd: stop SSD (non-rotational) disks before reboot


> > Sent: 02 July 2020 22:17
> > > > during a FLASH write or erase can cause from weakened cells, to much
> > > > larger damage.  It is possible to harden the chip or the design against
> > > > this, but it is *expensive*.  And even if warded off by hardening and no
> > > > FLASH damage happens, an erase/program cycle must be done on the whole
> > > > erase block to clean up the incomplete program cycle.
> > >
> > > It should have been SSD's(including FW) responsibility to avoid data loss when
> > > the SSD is doing its own BG writing, because power cut can happen any time
> > > from SSD's viewpoint.
> > 
> > It should be their responsibility. But we know how well that works
> > (not well), so we try hard (and should try hard) to power SSDs down
> > cleanly.
> I hope modern SSD disks are better than very old CF drives.

Testing showed there were not few yars ago.

> I had one where the entire contents got scrambled after an unexpected
> power removal.

If you have SSD you are willing to kill, I believe you can get to same
result with a bit of patience.

Best regards,
(cesky, pictures)

Download attachment "signature.asc" of type "application/pgp-signature" (182 bytes)

Powered by blists - more mailing lists