smartctl - Can't run select span range

Richard L. Hamilton rlhamil at
Mon Jun 25 14:16:37 UTC 2018

Looks to me like the code purposely and intentionally disallows that on a Mac.  No idea why - maybe the OS won't do it or doesn't like it.

In os_darwin.cpp:
484         select = in.in_regs.lba_low;
485         if (select != SHORT_SELF_TEST && select != EXTEND_SELF_TEST)
486         {
487           errno = EINVAL;
488           return set_err(ENOSYS, "Unsupported SMART self-test mode");
489         }
490         err = smartIf->SMARTExecuteOffLineImmediate (ifp,
491           select == EXTEND_SELF_TEST);
492         break;

In other words, on a Mac, I think only -t long and -t short would work, not any other -t options.

> On Jun 25, 2018, at 09:13, Ubence Quevedo (thatrat) <thatrat at> wrote:
> Hi All,
> I tried compiling the latest snapshot of smartmontools, and the problem is still occurring:
> Ubences-MacBook-Pro:smartmontools-6.7 uquevedo$ ./smartctl -t select,0-10 /dev/disk0
> smartctl 6.7 2018-06-21 r4735 [Darwin 17.6.0 x86_64] (local build)
> Copyright (C) 2002-18, Bruce Allen, Christian Franke, <>
> Sending command: "Execute SMART Selective self-test routine immediately in off-line mode".
> SPAN         STARTING_LBA           ENDING_LBA
>    0                    0                   10
> Command "Execute SMART Selective self-test routine immediately in off-line mode" failed: Unsupported SMART self-test mode
> This seems more a problem for smartmontools…?  Might this be a problem similar to not being able to scan external drives for smart information in macOS?
> I’m still curious if anyone has gotten the selective span scan to work in macOS...?
> -Ubence
>> On Jun 24, 2018, at 3:35 PM, Ubence Quevedo <thatrat at <mailto:thatrat at>> wrote:
>> Thanks for pointing this out, but the selective scan range for smartctl has never worked in previous versions available through macports from the last few years, I’m just now finally posting something about this.  I had worked around this by setting the sleep timeout on my Mac to a much longer timeout [three hours] so the whole drive [1TB] could be scanned on a long test.  From what I understand of the selective scan range, the range will be scanned, and when the next scan occurs, it’s scan the next range.
>> I’d really love for this feature to work so I don’t have to keep my system online all the time for scanning.
>> Any suggestions on how to look into this further?Perhaps build smartmontools from source and test?  Has anyone gotten the selective range to work for scanning from installing smartmontools from macports?
>> -Ubence
>> On Sun, Jun 24, 2018 at 3:15 PM Joshua Root <jmr at <mailto:jmr at>> wrote:
>> Ubence Quevedo wrote:
>> > However, when I boot the same system off of Ubuntu 18.04 Live USB with the
>> > same version of smartmontools [6.6], this command works properly:
>> Just a note that Ubuntu does not actually have the same version as
>> MacPorts. As your output shows:
>> MacPorts:
>> > smartctl 6.6 2017-11-05 r4594 [Darwin 17.6.0 x86_64] (local build)
>> Ubuntu:
>> > smartctl 6.6 2016-05-31 r4324 [x86_64-linux-4.15.0-20-generic] (local build)
>> MacPorts has the 6.6 release, corresponding to svn r4594. Ubuntu has an
>> svn snapshot from sometime after 6.5 but before 6.6, r4324. This is
>> confirmed by the listed Ubuntu package version:
>> < <>>
>> - Josh

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