Re: Device is not in smartctl database. Consequences and solution?
"Ivan Lezhnjov Jr." <[email protected]>
| Newsgroups | gmane.linux.utilities.smartmontools |
|---|---|
| Message-ID | <[email protected]> |
On Dec 7, 2013, at 4:48 PM, Christian Franke <[email protected]> wrote: > Ivan Lezhnjov Jr. wrote: >>> This is as expected because the USB ID drivedb entry is (only) used to set the -d option for the ATA pass-through protocol the USB bridge supports. >> Btw, I'm just curious.. in case with my particular drive I think a mere addition of a new DB entry that matches properly USB vendor and product IDs is mostly to associate "-d sat". But what about the actual SMART/ATA commands etc (mind you I have a very superfluous understanding so I may not make much sense lol), are they SOOO much universal that no additional configuration is required? > > Yes, the SMART READ DATA command itself is universal and unchanged since it first appeared in ATA-3 (1997). > > No, the SMART attribute data (bytes 0-361 of SMART data structure) is "Vendor specific" since ATA-4 (1998). > > The "SMART Attribute Annex" proposal was never included in the standard: > http://sourceforge.net/apps/trac/smartmontools/wiki/Links#ATAATAPIReferences Good to know. Thanks Chris. >> Can I be somehow sure that SMART Attributes are interpreted exactly like vendor designed them to be interpreted? > > No, unless a documentation of the attributes or a vendor specific SMART tool is available. > > In practice, it depends: > HDDs: Even recent HDDs apparently use the traditional attribute assignments. Documentation is rare. > > SSDs: Attributes differ in many cases. Smartctl may not print correct names and raw value formats unless a drivedb entry exists. Some vendors of SSDs or SSD controllers provide documentation, others don't. I have just received (finally!) a reply from WD support and they've escalated my ticket that requests authoritative explanation on how to interpret SMART attributes data for WD Elements 1048 drives. Would the developers of smartmontools be interested in getting a copy of it once, and if, I obtain it? If so, where would I submit it? Ivan ------------------------------------------------------------------------------ Rapidly troubleshoot problems before they affect your business. Most IT organizations don't have a clear picture of how application performance affects their revenue. With AppDynamics, you get 100% visibility into your Java,.NET, & PHP application. Start your 15-day FREE TRIAL of AppDynamics Pro! http://pubads.g.doubleclick.net/gampad/clk?id=84349831&iu=/4140/ostg.clktrk