サッカーワールドカップを見ながら、ふと、サーバーのSSDの寿命がきになったんです。 HDDの時は全く気にしなかった寿命、 寿命の前にスペック、容量、規格が変わるほうが多かったからだけども、
SSDになってからは寿命はわかるものになったし、必ずくるものになった。
でPCならば、CrystalDiskInfoで簡単に見れて、ここの E8 利用可能予備領域[寿命]
E9 メディア消耗指数
でわかる。100からどんどん少なくなっていくので、それで判断なんだけども、
サーバーでFreebsdだと smartmontools
でわかるらしい。 早速、インストールしてみた。
/usr/ports/sysutils/smartmontools
make install インストール終わったら、 SSDのデバイス名を dmesg | more 等でしらべて。 確認コマンドをで表示 smartctl --smart=on -a /dev/ada0 smartctl 6.0 2012-10-10 r3643 [FreeBSD 9.1-RELEASE amd64] (local build)
Copyright (C) 2002-12, Bruce Allen, Christian Franke, www.smartmontools.org === START OF INFORMATION SECTION ===
Device Model: INTEL SSDSC2CT240A4
Serial Number: CVKI304300F5240DGN
LU WWN Device Id: 5 001517 8f3695779
Firmware Version: 335t
User Capacity: 240,057,409,536 bytes [240 GB]
Sector Size: 512 bytes logical/physical
Rotation Rate: Solid State Device
Device is: Not in smartctl database [for details use: -P showall]
ATA Version is: ACS-2 (minor revision not indicated)
SATA Version is: SATA 3.0, 6.0 Gb/s (current: 6.0 Gb/s)
Local Time is: Fri Jun 27 01:21:04 2014 JST
SMART support is: Available - device has SMART capability.
SMART support is: Disabled === START OF ENABLE/DISABLE COMMANDS SECTION ===
SMART Enabled. === START OF READ SMART DATA SECTION ===
SMART overall-health self-assessment test result: PASSED General SMART Values:
Offline data collection status: (0x00) Offline data collection activity
was never started.
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: ( 5860) seconds.
Offline data collection
capabilities: (0x7f) SMART execute Offline immediate.
Auto Offline data collection on/off support.
Abort Offline collection upon new
command.
Offline surface scan supported.
Self-test supported.
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: ( 1) minutes.
Extended self-test routine
recommended polling time: ( 48) minutes.
Conveyance self-test routine
recommended polling time: ( 2) minutes.
SCT capabilities: (0x0021) SCT Status supported.
SCT Data Table supported. SMART Attributes Data Structure revision number: 10
Vendor Specific SMART Attributes with Thresholds:
ID# ATTRIBUTE_NAME FLAG VALUE WORST THRESH TYPE UPDATED WHEN_FAILED RAW_VALUE
5 Reallocated_Sector_Ct 0x0032 100 100 000 Old_age Always - 0
9 Power_On_Hours 0x0032 100 100 000 Old_age Always - 9868 (119 108 0)
12 Power_Cycle_Count 0x0032 100 100 000 Old_age Always - 31
192 Power-Off_Retract_Count 0x0032 100 100 000 Old_age Always - 14
225 Unknown_SSD_Attribute 0x0032 100 100 000 Old_age Always - 324005
232 Available_Reservd_Space 0x0033 100 100 010 Pre-fail Always - 0
233 Media_Wearout_Indicator 0x0032 100 100 000 Old_age Always - 0
241 Total_LBAs_Written 0x0032 100 100 000 Old_age Always - 324005
242 Total_LBAs_Read 0x0032 100 100 000 Old_age Always - 65002
249 Unknown_Attribute 0x0013 100 100 000 Pre-fail Always - 6379 SMART Error Log not supported 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 0
Note: revision number not 1 implies that no selective self-test has ever been run
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.
で、
E8にあたる 232 Available_Reservd_Space が予約領域の残っている数 100 から始まって、 10 までなら安全らしいよ。
E9にあたる 233 Media_Wearout_Indicator が使用率 100 から 1 まで減っていくらしいよ まだ、まだ大丈夫っぽい。ほ。
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