¿Qué comando o programa de terminal puede enumerar las horas de encendido de un SSD?

El comando que me funciona en 2019 es:

smartctl -a disk0 | grep -i hours

La instalación de Homebrew es probablemente la más fácil y aquí hay algunos detalles sobre la instalación y el uso de la herramienta.

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smartmontoolses un paquete de código abierto que proporciona la mayoría de los valores que le interesan.

Si usa Homebrew , instálelo con:

brew install smartmontools

(En la instalación estándar de Homebrew, los comandos se instalan en /usr/local/bin).

De lo contrario, descárguelo de https://www.smartmontools.org/wiki/Download y compílelo como de costumbre:

$ cd smartmontools-6.0
$ ./configure 
$ make
$ sudo make install

(A menos que se especifique lo contrario como una opción para ./configure, los smartmontoolscomandos se instalan en /usr/local/sbin, así que actualice la $PATHvariable si es necesario).

La herramienta que nos interesa se llama smartctl.

Primero active SMART:

$ smartctl /dev/disk0 -s on

Luego ejecútalo:

$ smartctl /dev/disk0 -x

Este es un extracto de la salida, que proporciona una gran cantidad de información. Los valores para Power_On_Hoursy Power_Cycle_Countdebajo coinciden (una vez convertidos de decimal a hexadecimal) con los que informa la Utilidad de Discos.

smartctl 6.0 2012-10-10 r3643 [x86_64-apple-darwin12.2.0] (local build)
Copyright (C) 2002-12, Bruce Allen, Christian Franke, www.smartmontools.org

=== START OF INFORMATION SECTION ===
Model Family:     JMicron based SSDs
Device Model:     APPLE SSD TS128C
Serial Number:    37AR11AGLTMZ
Firmware Version: CJAA0201
User Capacity:    121,332,826,112 bytes [121 GB]
Sector Size:      512 bytes logical/physical
Rotation Rate:    Solid State Device
Device is:        In smartctl database [for details use: -P show]
ATA Version is:   ATA8-ACS (minor revision not indicated)
SATA Version is:  SATA 2.6, 3.0 Gb/s (current: 3.0 Gb/s)

(...)

SMART Attributes Data Structure revision number: 16
Vendor Specific SMART Attributes with Thresholds:
ID# ATTRIBUTE_NAME          FLAGS    VALUE WORST THRESH FAIL RAW_VALUE
  1 Raw_Read_Error_Rate     -O-R--   099   099   000    -    0
  2 Throughput_Performance  P-S---   100   100   050    -    0
  5 Reallocated_Sector_Ct   PO--C-   100   100   050    -    0
  9 Power_On_Hours          -O--C-   100   100   000    -    3237
 12 Power_Cycle_Count       -O--C-   100   100   000    -    1485
168 SATA_Phy_Error_Count    -O--C-   100   100   000    -    0
170 Bad_Block_Count         PO--C-   100   100   010    -    8 252 82
173 Erase_Count             PO--C-   196   196   100    -    1 136 64
175 Bad_Cluster_Table_Count PO--C-   100   100   010    -    0
192 Unexpect_Power_Loss_Ct  -O--C-   100   100   000    -    14
194 Temperature_Celsius     PO---K   072   053   030    -    28 (Min/Max 14/47)
197 Current_Pending_Sector  -O--C-   100   100   000    -    0
199 UDMA_CRC_Error_Count    -O--C-   100   100   000    -    0
                            ||||||_ K auto-keep
                            |||||__ C event count
                            ||||___ R error rate
                            |||____ S speed/performance
                            ||_____ O updated online
                            |______ P prefailure warning

ATA_READ_LOG_EXT (addr=0x00:0x00, page=0, n=1) failed: 48-bit ATA commands not supported
Read GP Log Directory failed

SMART Log Directory Version 1 [multi-sector log support]
SMART Log at address 0x00 has    1 sectors [Log Directory]
SMART Log at address 0x01 has    1 sectors [Summary SMART error log]
SMART Log at address 0x02 has   51 sectors [Comprehensive SMART error log]
SMART Log at address 0x06 has    1 sectors [SMART self-test log]
SMART Log at address 0x09 has    1 sectors [Selective self-test log]
SMART Log at address 0x80 has   16 sectors [Host vendor specific log]
(...)
SMART Log at address 0x9f has   16 sectors [Host vendor specific log]
SMART Log at address 0xe0 has    1 sectors [SCT Command/Status]
SMART Log at address 0xe1 has    1 sectors [SCT Data Transfer]

SMART Extended Comprehensive Error Log (GP Log 0x03) not supported

SMART Error Log Version: 1
No Errors Logged

SMART Extended Self-test Log (GP Log 0x07) not supported

SMART Self-test log structure revision number 1
Num  Test_Description    Status                  Remaining  LifeTime(hours)  LBA_of_first_error

SMART Selective self-test log data structure revision number 1
 SPAN  MIN_LBA  MAX_LBA  CURRENT_TEST_STATUS
    1        0        0  Not_testing
    2        0        0  Not_testing
    3        0        0  Not_testing
    4        0        0  Not_testing
    5        0        0  Not_testing
Selective self-test flags (0x0):
  After scanning selected spans, do NOT read-scan remainder of disk.
If Selective self-test is pending on power-up, resume after 0 minute delay.

SCT Status Version:                  3
SCT Version (vendor specific):       1 (0x0001)
SCT Support Level:                   0
Device State:                        Active (0)
Current Temperature:                    28 Celsius
Power Cycle Min/Max Temperature:     22/30 Celsius
Lifetime    Min/Max Temperature:     14/47 Celsius
Under/Over Temperature Limit Count:   0/0
SCT Temperature History Version:     2
Temperature Sampling Period:         1 minute
Temperature Logging Interval:        1 minute
Min/Max recommended Temperature:      5/40 Celsius
Min/Max Temperature Limit:            0/70 Celsius
Temperature History Size (Index):    128 (77)

Index    Estimated Time   Temperature Celsius
  78    2012-11-29 19:48    25  ******
 ...    ..(  7 skipped).    ..  ******
  86    2012-11-29 19:56    25  ******
  87    2012-11-29 19:57    26  *******
 ...    ..( 19 skipped).    ..  *******
 107    2012-11-29 20:17    26  *******
 108    2012-11-29 20:18    27  ********
 ...    ..( 16 skipped).    ..  ********
 125    2012-11-29 20:35    27  ********
 126    2012-11-29 20:36    28  *********
 ...    ..(  7 skipped).    ..  *********
   6    2012-11-29 20:44    28  *********
   7    2012-11-29 20:45    29  **********
   8    2012-11-29 20:46    29  **********
   9    2012-11-29 20:47    28  *********
 ...    ..( 67 skipped).    ..  *********
  77    2012-11-29 21:55    28  *********

SMART WRITE LOG does not return COUNT and LBA_LOW register
SCT (Get) Error Recovery Control command failed

Device Statistics (GP Log 0x04) not supported

ATA_READ_LOG_EXT (addr=0x11:0x00, page=0, n=1) failed: 48-bit ATA commands not supported
Read SATA Phy Event Counters failed

Para finalizar, desactive SMART:

$ smartctl /dev/disk0 -s off

¿Qué hay de usar el system_profilercomando incorporado?

system_profiler -listDataTypes
system_profiler SPSerialATADataType
system_profiler -xml SPSerialATADataType

Las Mac más nuevas tienen unidades NVMe y no unidades SATA, por lo que comenzaría con system_profiler SPNVMeDataTypeobtener nombres BSD y otros datos que no son tan detallados como las horas de encendido. El smartctl -a disk0 | grep -I hourscomando de smartmontools es la herramienta de línea de comandos ideal para obtener más detalles sobre el hardware de almacenamiento.