Re: odd selftest log on an OCZ VERTEX PLUS SSD
Richard Flint <[email protected]>
| Newsgroups | gmane.linux.utilities.smartmontools |
|---|---|
| Message-ID | <CAKBmWJ5fx2Ny=JVueJuKk+Xtzgr7QSOXBOyDQTADMGkfdk9auA@mail.gmail.com> |
Hi, Thanks for the clarification. I accept your point that querying some data requires support for 48-bit ATA commands whilst other data can be queried using 28-bit ATA commands. What confuses me is that when comparing the output of "sudo smartctl --xall xselftest -dsat,12 /dev/rdsk/c7t5d0" and "sudo smartctl --xall xselftest -dsat,16 /dev/rdsk/c7t5d0", the latter returns more data (e.g. the SATA Phy Event Counter log) than the former. If the environment does not support the longer ATA command (as mine apparently doesn't) I wouldn't expect -dsat,16 command to return more data then dsat,12. Perhaps I've misunderstood something here. Regards, Richard On 14 August 2014 06:39, Christian Franke <[email protected]> wrote: > Richard Flint wrote: > >> >> "sudo smartctl -l xselftest -dsat,12 /dev/rdsk/c7t5d0" errors with >> >> ATA_READ_LOG_EXT (addr=0x00:0x00, page=0, n=1) failed: 48-bit ATA >> commands require SAT ATA PASS-THROUGH (16) >> >> Read GP Log Directory failed >> >> SMART Extended Self-test Log (GP Log 0x07) not supported >> >> >> There are some unusual aspect to this that I cannot explain: The commands >> "sudo smartctl --xall xselftest -dsat,12 /dev/rdsk/c7t5d0" and "sudo >> smartctl --xall xselftest -dsat,16 /dev/rdsk/c7t5d0" return very different >> outputs with the former saying they are not supported and the latter >> clearly stating extended self test logs are supported: >> >> >> > This is as expected. Note that "not supported" does not imply "by the > device". > > Checking for support of any GP Log requires the ability to read the GP Log > Directory. This requires support for 48-bit ATA commands in the ATA > pass-through implementation. The SAT ATA-PASS-THROUGH(12) SCSI command only > supports 28-bit ATA commands. > > Thanks, > Christian > > ------------------------------------------------------------------------------ _______________________________________________ Smartmontools-support mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/smartmontools-support