Re: [smartmontools-support] I'd like to fix read failure issue on Mac OS X

[Kimio M. <xa...@ap...>]

2014/12/18 3:15, Nathan Stratton Treadway <nathanst <at> ontko.com> wrote:

> On Wed, Dec 17, 2014 at 18:03:04 +0900, Kimio Miyamura wrote:
>> $ sudo fdisk /dev/disk5
>> Password:
>> Disk: /dev/disk5	geometry: 60801/255/63 [976773168 sectors]
>> Signature: 0xAA55
>>         Starting       Ending
>> #: id  cyl  hd sec -  cyl  hd sec [     start -       size]
>> ------------------------------------------------------------------------
>> 1: EE 1023 254  63 - 1023 254  63 [         1 -  976773167] <Unknown ID>
>> 2: 00    0   0   0 -    0   0   0 [         0 -          0] unused      
>> 3: 00    0   0   0 -    0   0   0 [         0 -          0] unused      
>> 4: 00    0   0   0 -    0   0   0 [         0 -          0] unused
> 
> I'm not sure if this will actually resolve your LBA v.s. size problem,
> but the id value of "EE" shown above indicates that this disk is using
> GPT for partitioning, and thus probably the "gpt" command is what you
> want to be using to see the layout of the actual partitions on that
> disk....

Thanks for your advice.  Now I can get partition layout using Mac OS X built-in command.

$ sudo gpt show -l /dev/disk5
             start                 size      index  contents
                  0                     1                PMBR
                  1                     1                Pri GPT header
                  2                   32                Pri GPT table
                34                     6         
                40           409600      1         GPT part - "EFI System Partition"
        409640     976101344      2         GPT part - "USB HD 3"
  976510984           262151         
  976773135                   32                 Sec GPT table
  976773167                     1                 Sec GPT header

But sadly, the max result  976773167 < 976783240.  
I confirmed (976773167+1)*512=976773168*512=500,107,862,016bytes is exactly same as the bytes number of this hdd on my mac os x.

Is there any wrong with usage or setting of smartctl?
In addition, I'm using OS-X-SAT-SMART-Driver ver. 0.10 to enable S.M.A.R.T capability of external hdd.  Is this related with this mismatch of LBA?

I have re-compiled smartmontools ver.6.3 but the result is same...

Note: Currently all data on this hdd were taken shelter.  So I can do anything on this hdd...


// Miya