Re: [smartmontools-support] Using SmartCtl to identify SSD

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

Eric Walasek wrote:
>
> Can this tool dump the data from the ATA IDENTIFY_DEVICE_DATA 
> structure? I’d like to parse it and determine the value of word 217, 
> which would identify the rotational speed per the ATA8-ACS 
> specifications. I’ve tried a lot of parameter combinations, but not 
> sure if I’ll be able to get what I am looking for. Thanks.
>

The debug output includes a hex dump of IDENTIFY data. Swap bytes 
434/435 for the desired value.
Some real world examples:

# smartctl -r ioctl,2 -i /dev/ice
...
===== [IDENTIFY DEVICE] DATA START (BASE-16) =====
...
432-447: 00 00 18 15 00 00 00 00 00 00 00 00 1f 10 00 00
...............^^^^^ 0x1518 = 5400 rpm (Samsung HD204UI)

432-447: 00 00 20 1c 00 00 00 00 00 00 00 00 10 10 00 00
...............^^^^^ 0x1c20 = 7200 rpm (Seagate ST32000641AS)

432-447: 00 00 01 00 00 00 00 00 00 00 00 00 10 10 ff ff
...............^^^^^ 0x0001 = non-rotating (Sandforce SF-1200 Demo SSD)


Thanks,
Christian