Re: [smartmontools-support] odd selftest log on an OCZ VERTEX PLUS SSD

[Christian F. <Chr...@t-...>]

Richard Flint wrote:
>
> "sudo smartctl -l xselftest -dsat,12 /dev/rdsk/c7t5d0" errors with
>
> ATA_READ_LOG_EXT (addr=0x00:0x00, page=0, n=1) failed: 48-bit ATA 
> commands require SAT ATA PASS-THROUGH (16)
>
> Read GP Log Directory failed
>
> SMART Extended Self-test Log (GP Log 0x07) not supported
>
>
> There are some unusual aspect to this that I cannot explain: The 
> commands "sudo smartctl --xall xselftest -dsat,12 /dev/rdsk/c7t5d0" 
> and "sudo smartctl --xall xselftest -dsat,16 /dev/rdsk/c7t5d0" return 
> very different outputs with the former saying they are not supported 
> and the latter clearly stating extended self test logs are supported:
>
>

This is as expected. Note that "not supported" does not imply "by the 
device".

Checking for support of any GP Log requires the ability to read the GP 
Log Directory. This requires support for 48-bit ATA commands in the ATA 
pass-through implementation. The SAT ATA-PASS-THROUGH(12) SCSI command 
only supports 28-bit ATA commands.

Thanks,
Christian