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... :-)
- I've only tested this with WD2000JD and WD1001FALS disks. Those with
Seagate, Maxtor, Hitachi/IBM, Fujitsu, Samsung, and others will probably
find many of their attributes names appear as "<unknown>". See below for
how you can help improve this situation.
- 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.
- All of the code was written by hand; that is to say, there is no code
copied/stolen from smartmontools, as it's released under the GPL.
I'll be putting diffs/patches up at my site[2] as I work on
improvements. I won't be maintaining a CHANGES log for now, unless
people really want me to keep one.
Methodology I use to test:
$ cd /some/other/place
$ cp -pR /usr/src/sbin/atacontrol .
$ patch -p0 < atacontrol-smart-20100125_01.diff
$ cd atacontrol
$ make
$ ./atacontrol smart <disk>
Let me know if you're interested in helping improve this, and/or if this
feature is at all worth being imported into the standard atacontrol(8)
utility.
For those wanting to help extend the SMART attribute ID-to-name mapping,
this is quite easy: install smartmontools and send me the output from
"smartctl -a /dev/adXX". I can work out the rest.
Thanks.
[1]: http://lists.freebsd.org/pipermail/freebsd-stable/2009-December/053464.html
[2]: http://jdc.parodius.com/freebsd/atacontrol/
--
| Jeremy Chadwick j...@parodius.com |
| Parodius Networking http://www.parodius.com/ |
| UNIX Systems Administrator Mountain View, CA, USA |
| Making life hard for others since 1977. PGP: 4BD6C0CB |
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