Bad SSD drive - what happens with unreadable data

[Jan Martin Mikkelsen]

Hi,

You need to add “sync" to get the unreadable areas filled with zeros. Something like "dd conv=sync,noerror bs=4k” is probably good.

Regards,

Jan.

> On 13 Jun 2019, at 13:02, peter.blok at bsd4all.org wrote:
> 
> Hi,
> 
> I have a bad SSD drive. If I read it with dd and conv=noerror, what happens with the unreadable areas? Does it fill with zeroes, or does the driver still copy what it was able to read?
> 
> I’m 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
> 
> 
> 
> 
> _______________________________________________
> freebsd-scsi at freebsd.org mailing list
> https://lists.freebsd.org/mailman/listinfo/freebsd-scsi
> To unsubscribe, send any mail to "freebsd-scsi-unsubscribe at freebsd.org"