Looking for testers: atacontrol SMART support

[nickolasbug at gmail.com]

2010/1/26 Jeremy Chadwick <freebsd at jdc.parodius.com>:
> As mentioned a while back on the list[1], I worked on getting atacontrol
> to spit out SMART statistics for ATA disks.  Specifically, this would be
> those using the standard ata(4) layer (including ataahci.ko and
> similar), but not ahci(4) (ahci.ko), which uses ATA/CAM.
>
> Output resembles the following:
>
> ID#   Attribute Name              Curr Worst Thrsh  Bytes
> ---   -------------------------  ----- ----- -----  -----------------
>  1   Raw Read Error Rate          200   200    51  00 00 00 00 00 00
>  3   Spin Up Time                 234   229    21  53 20 00 00 00 00
>  4   Start/Stop Count             100   100     0  11 00 00 00 00 00
>  5   Reallocated Sector Count     200   200   140  00 00 00 00 00 00
>  7   Seek Error Rate              200   200     0  00 00 00 00 00 00
>  9   Power On Hours Count          95    95     0  9b 0f 00 00 00 00
>  10   Spin Retry Count             100   253     0  00 00 00 00 00 00
>  11   Calibration Retry Count      100   253     0  00 00 00 00 00 00
>  12   Power Cycle Count            100   100     0  0c 00 00 00 00 00
> 192   Power Off Retract Count      200   200     0  0b 00 00 00 00 00
> 193   Load Cycle Count             200   200     0  11 00 00 00 00 00
> 194   Temperature                  116   113     0  22 00 00 00 00 00
> 196   Reallocated Event Count      200   200     0  00 00 00 00 00 00
> 197   Current Pending Sectors      200   200     0  00 00 00 00 00 00
> 198 * Uncorrected Sector Count     200   200     0  00 00 00 00 00 00
> 199   UltraDMA CRC Error Count     200   200     0  00 00 00 00 00 00
> 200 * Write Error Rate             200   200     0  00 00 00 00 00 00
> ---   -------------------------  ----- ----- -----  -----------------
>    * = values only updated after a short/long/offline test
>
> Things to note:
>
> - I've only been testing on RELENG_8 amd64.  The code should work on
> i386, but if something explodes, let me know.  I don't recommend
> patching RELENG_7 or even a RELEASE tag with this.
>
> - I did my best to document the SMART "stuff" throughout the source.
> Much to my disappointment SMART attributes are not part of the ATA
> or ACS specification; they're mentioned, but attributes and their
> interpretation are 100% vendor specific.  Decoding them will involve
> examining the smartmontools source, which takes time.
>
> This is why there is no smartmontools "RAW_VALUE" equivalent -- the
> code for that piece simply hasn't been written.  Instead, I display
> the raw bytes associated with each attribute.  This should help with
> debugging (for the time being).  I'll work things out...  :-)

As I know, there is no decode for raw value (even in smartmontools).
So, you can just store this six bytes in 64-bit variable and print it
out.

>
> - All operations done are read-only (in fact the device is opened in
> read-only mode).  There may be plans down the road to implement things
> like inducing SMART short/long/offline tests, but for now I want to
> get attribute support in there.

Implementation of tests is quite easy.

I've wrote nearly the same project for linux some time ago, so I  can
htlp you with this project.
Please, mail me if you're get interested in my help.

wbr,
Nickolas