Date: Tue, 26 Jan 2010 14:32:32 +0200 From: nickolasbug@gmail.com To: Jeremy Chadwick <freebsd@jdc.parodius.com> Cc: freebsd-stable@freebsd.org Subject: Re: Looking for testers: atacontrol SMART support Message-ID: <368117f31001260432h365c762at9c8664e5ccb2310@mail.gmail.com> In-Reply-To: <20100126044041.GA33624@icarus.home.lan> References: <20100126044041.GA33624@icarus.home.lan>
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2010/1/26 Jeremy Chadwick <freebsd@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. =A0Specifically, this would b= e > 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# =A0 Attribute Name =A0 =A0 =A0 =A0 =A0 =A0 =A0Curr Worst Thrsh =A0Byt= es > --- =A0 ------------------------- =A0----- ----- ----- =A0---------------= -- > =A01 =A0 Raw Read Error Rate =A0 =A0 =A0 =A0 =A0200 =A0 200 =A0 =A051 =A0= 00 00 00 00 00 00 > =A03 =A0 Spin Up Time =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 234 =A0 229 =A0 =A0= 21 =A053 20 00 00 00 00 > =A04 =A0 Start/Stop Count =A0 =A0 =A0 =A0 =A0 =A0 100 =A0 100 =A0 =A0 0 = =A011 00 00 00 00 00 > =A05 =A0 Reallocated Sector Count =A0 =A0 200 =A0 200 =A0 140 =A000 00 00= 00 00 00 > =A07 =A0 Seek Error Rate =A0 =A0 =A0 =A0 =A0 =A0 =A0200 =A0 200 =A0 =A0 0= =A000 00 00 00 00 00 > =A09 =A0 Power On Hours Count =A0 =A0 =A0 =A0 =A095 =A0 =A095 =A0 =A0 0 = =A09b 0f 00 00 00 00 > =A010 =A0 Spin Retry Count =A0 =A0 =A0 =A0 =A0 =A0 100 =A0 253 =A0 =A0 0 = =A000 00 00 00 00 00 > =A011 =A0 Calibration Retry Count =A0 =A0 =A0100 =A0 253 =A0 =A0 0 =A000 = 00 00 00 00 00 > =A012 =A0 Power Cycle Count =A0 =A0 =A0 =A0 =A0 =A0100 =A0 100 =A0 =A0 0 = =A00c 00 00 00 00 00 > 192 =A0 Power Off Retract Count =A0 =A0 =A0200 =A0 200 =A0 =A0 0 =A00b 00= 00 00 00 00 > 193 =A0 Load Cycle Count =A0 =A0 =A0 =A0 =A0 =A0 200 =A0 200 =A0 =A0 0 = =A011 00 00 00 00 00 > 194 =A0 Temperature =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0116 =A0 113 =A0 = =A0 0 =A022 00 00 00 00 00 > 196 =A0 Reallocated Event Count =A0 =A0 =A0200 =A0 200 =A0 =A0 0 =A000 00= 00 00 00 00 > 197 =A0 Current Pending Sectors =A0 =A0 =A0200 =A0 200 =A0 =A0 0 =A000 00= 00 00 00 00 > 198 * Uncorrected Sector Count =A0 =A0 200 =A0 200 =A0 =A0 0 =A000 00 00 = 00 00 00 > 199 =A0 UltraDMA CRC Error Count =A0 =A0 200 =A0 200 =A0 =A0 0 =A000 00 0= 0 00 00 00 > 200 * Write Error Rate =A0 =A0 =A0 =A0 =A0 =A0 200 =A0 200 =A0 =A0 0 =A00= 0 00 00 00 00 00 > --- =A0 ------------------------- =A0----- ----- ----- =A0---------------= -- > =A0 =A0* =3D values only updated after a short/long/offline test > > Things to note: > > - I've only been testing on RELENG_8 amd64. =A0The code should work on > i386, but if something explodes, let me know. =A0I 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. =A0Decoding 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. =A0Instead, I display > the raw bytes associated with each attribute. =A0This should help with > debugging (for the time being). =A0I'll work things out... =A0:-) 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). =A0There 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
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