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Re: how to enable trim for an external encrypted SSD?

Followups directed to: debian-user <debian-user@lists.debian.org>

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On 11/11/2017 02:31 PM, Joerg Desch wrote:
> Am Sat, 11 Nov 2017 14:13:12 +0100 schrieb Christian Seiler:
> 
>> Also, did you mount the device with -o discard or set that option with
>> tune2fs (_before_ mounting it)?
> 
> No, not now. I want to use fstrim in favour to the discard option. But 
> I've tested it with an Arch Linux installation with a more fresh kernel. 
> There both vairante (fstrim and discard-option in fstab) fails too. In 
> case of the discard option, the error is written to the logs.
> 
>> What does the command
>> findmnt | grep /media/jd/TEST
> 
> $ findmnt | grep /media/jd/TEST
> ├─/media/jd/TEST                      /dev/sdg1          ext4            
> rw,nosuid,nodev,relatime,data=ordered
> 
> $ sudo lsblk -D
> [sudo] password for jd: 
> NAME   DISC-ALN DISC-GRAN DISC-MAX DISC-ZERO
> sda           0      512B       2G         0
> ├─sda1        0      512B       2G         0
> └─sda2        0      512B       2G         0
> sdb           0        0B       0B         0
> sdg           0        0B       0B         0
> └─sdg1        0        0B       0B         0
> 
> 
> In this case, sda is a internal SSD (Samsung EVO) with working TRIM and 
> sdb is a HDD.

Well, then it appears that the chip (or the kernel driver for it) doesn't
support passing through the TRIM command to the underyling SSD.

If it's the kernel driver there's a chance that'll be fixed in a future
kernel version.

If it's the the chip itself you're stuck without TRIM on the external
SSD.

Unfortunately I can't say much more about that, I've never had an
external SSD.

Regards,
Christian

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Thread

how to enable trim for an external encrypted SSD? Joerg Desch <news@jdesch.de> - 2017-11-06 13:10 +0100
  Re: how to enable trim for an external encrypted SSD? Christian Seiler <christian@iwakd.de> - 2017-11-06 14:30 +0100
    Re: how to enable trim for an external encrypted SSD? "Alexander V. Makartsev" <avbetev@gmail.com> - 2017-11-06 21:10 +0100
      Re: how to enable trim for an external encrypted SSD? Michael Stone <mstone@debian.org> - 2017-11-06 21:50 +0100
        Re: how to enable trim for an external encrypted SSD? "Alexander V. Makartsev" <avbetev@gmail.com> - 2017-11-06 22:30 +0100
          Re: how to enable trim for an external encrypted SSD? Michael Stone <mstone@debian.org> - 2017-11-06 23:10 +0100
            Re: how to enable trim for an external encrypted SSD? "Alexander V. Makartsev" <avbetev@gmail.com> - 2017-11-07 00:20 +0100
              Re: ow to enable trim for an external encrypted SSD? dekkzz78@gmail.com - 2017-11-07 13:40 +0100
          Re: how to enable trim for an external encrypted SSD? Henrique de Moraes Holschuh <hmh@debian.org> - 2017-11-07 02:10 +0100
      Re: how to enable trim for an external encrypted SSD? Joerg Desch <news@jdesch.de> - 2017-11-07 08:20 +0100
    Re: how to enable trim for an external encrypted SSD? Joerg Desch <news@jdesch.de> - 2017-11-07 08:10 +0100
    Re: how to enable trim for an external encrypted SSD? Joerg Desch <news@jdesch.de> - 2017-11-11 14:10 +0100
      Re: how to enable trim for an external encrypted SSD? Christian Seiler <christian@iwakd.de> - 2017-11-11 14:20 +0100
        Re: how to enable trim for an external encrypted SSD? Joerg Desch <news@jdesch.de> - 2017-11-11 14:40 +0100
          Re: how to enable trim for an external encrypted SSD? Christian Seiler <christian@iwakd.de> - 2017-11-11 15:30 +0100
            Re: how to enable trim for an external encrypted SSD? Joerg Desch <news@jdesch.de> - 2017-11-11 16:50 +0100
              Re: how to enable trim for an external encrypted SSD? Stefan Monnier <monnier@iro.umontreal.ca> - 2017-11-16 04:10 +0100
                Re: how to enable trim for an external encrypted SSD? Joerg Desch <news@jdesch.de> - 2017-11-21 18:40 +0100
    Re: how to enable trim for an external encrypted SSD? Christian Seiler <christian@iwakd.de> - 2017-12-18 13:20 +0100

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