Questions about erasing an ssd to restore performance under FreeBSD

[Steven Hartland]

----- Original Message ----- 
From: "Alexander Motin" <mav at FreeBSD.org>
> `newfs -E` depends on disk driver's support for BIO_DELETE request. For
> now, AFAIR it is supported at least by ada, mmcsd, some cases of ad and
> few other cases. da driver doesn't support it now. Also, except da
> driver, TRIM command should be supported by the controller firmware,
> that implements SCSI<->ATA protocol translation, and AFAIK often it
> isn't so.

That's what I thought might be the case, would be good to mention this in
the man page as atm its very misleading.

    Regards
    Steve

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