可以用Smartontools查看Mac的磁盘信息,下面使用port安装此工具。

$ sudo port install smartmontools

查看SSD磁盘寿命情况,一般查看的是'Wear_Leveling_Count',初始值应该是200,当这个值接近100时,就要考虑更换硬盘了。普通SSD在写入100T后是将逐渐会出现问题。

$ smartctl -a /dev/disk0
smartctl 6.4 2015-06-04 r4109 [x86_64-apple-darwin15.3.0] (local build)
Copyright (C) 2002-15, Bruce Allen, Christian Franke, www.smartmontools.org

=== START OF INFORMATION SECTION ===
Model Family:     Apple SD/SM/TS...E/F SSDs
Device Model:     APPLE SSD SM256E
Serial Number:    S0X5NYBC737708
LU WWN Device Id: 5 002538 043584d30
Firmware Version: CXM09A1Q
User Capacity:    251,000,193,024 bytes [251 GB]
Sector Sizes:     512 bytes logical, 4096 bytes physical
Rotation Rate:    Solid State Device
Device is:        In smartctl database [for details use: -P show]
ATA Version is:   ATA8-ACS T13/1699-D revision 4c
SATA Version is:  SATA 3.0, 6.0 Gb/s (current: 6.0 Gb/s)
Local Time is:    Mon Aug 29 11:05:08 2016 CST
SMART support is: Available - device has SMART capability.
SMART support is: Enabled

=== START OF READ SMART DATA SECTION ===
SMART overall-health self-assessment test result: PASSED

General SMART Values:
Offline data collection status:  (0x02) Offline data collection activity
                    was completed without error.
                    Auto Offline Data Collection: Disabled.
Self-test execution status:      (   0) The previous self-test routine completed
                    without error or no self-test has ever 
                    been run.
Total time to complete Offline 
data collection:        (  960) seconds.
Offline data collection
capabilities:            (0x5b) SMART execute Offline immediate.
                    Auto Offline data collection on/off support.
                    Suspend Offline collection upon new
                    command.
                    Offline surface scan supported.
                    Self-test supported.
                    No Conveyance Self-test supported.
                    Selective Self-test supported.
SMART capabilities:            (0x0003) Saves SMART data before entering
                    power-saving mode.
                    Supports SMART auto save timer.
Error logging capability:        (0x01) Error logging supported.
                    General Purpose Logging supported.
Short self-test routine 
recommended polling time:    (   2) minutes.
Extended self-test routine
recommended polling time:    (  16) minutes.

SMART Attributes Data Structure revision number: 1
Vendor Specific SMART Attributes with Thresholds:
ID# ATTRIBUTE_NAME          FLAG     VALUE WORST THRESH TYPE      UPDATED  WHEN_FAILED RAW_VALUE
  1 Raw_Read_Error_Rate     0x001a   200   200   000    Old_age   Always       -       0
  5 Reallocated_Sector_Ct   0x0033   100   100   000    Pre-fail  Always       -       0
  9 Power_On_Hours          0x0032   099   099   000    Old_age   Always       -       4547
 12 Power_Cycle_Count       0x0032   094   094   000    Old_age   Always       -       5464
169 Unknown_Attribute       0x0013   253   253   010    Pre-fail  Always       -       1873134229760
173 Wear_Leveling_Count     0x0032   190   190   100    Old_age   Always       -       90214170749
192 Power-Off_Retract_Count 0x0012   099   099   000    Old_age   Always       -       3873
194 Temperature_Celsius     0x0022   057   027   000    Old_age   Always       -       43 (Min/Max 9/73)
197 Current_Pending_Sector  0x0022   100   100   000    Old_age   Always       -       0
199 UDMA_CRC_Error_Count    0x001a   200   200   000    Old_age   Always       -       0

SMART Error Log Version: 1
No Errors Logged

SMART Self-test log structure revision number 1
No self-tests have been logged.  [To run self-tests, use: smartctl -t]

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.

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最近由“jilili”在“2016-08-29 11:24:55”修改