%20%E7%9A%84%E6%80%BB%E5%AD%97%E8%8A%82%E6%95%B0%20(TBW%2CDWPD)%20%E7%9A%84%E6%AF%8F%E6%97%A5%E6%8A%A5%E5%91%8A.png)
获得正确值的最佳方法是什么写入的总字节数每天到磁盘？
我的目标是随着时间的推移记录下来，这样作为管理员，您可以对 Linux 服务器上的活动有一定的了解，并掌握第一手指标，我可以用它来预测 SSD 的预期寿命……如果更便宜的消费级 1-例如，可以使用 DWPD，或者对于您正在做的事情，您需要使用 3-DWPD 企业级 SSD。
我对 XFS、EXT4、BTFS 文件系统选择之间的差异以及 Linux 中安装的额外软件/服务感兴趣，这些差异可能会影响 SSD 的寿命。
smartctl有没有比捕获我正在寻找的信息更好的命令？ 我可以编写代码来处理这个--xall扩展输出，或者有更好的更具体的 smartctl 选项吗？
根据此输出，我应该使用什么值来准确确定驱动器写入？我将通过 为磁盘 0..7 执行以下操作-d megaraid,#。这在 RHEL 8.9 上有效。
smartctl --xall -d megaraid,0 /dev/sda
smartctl 7.1 2019-12-30 r5022 [x86_64-linux-4.18.0-513.11.1.el8_9.x86_64] (local build)
Copyright (C) 2002-19, Bruce Allen, Christian Franke, www.smartmontools.org
=== START OF INFORMATION SECTION ===
Vendor: TOSHIBA
Product: KPM5WRUG3T84
Revision: B318
Compliance: SPC-4
User Capacity: 3,840,755,982,336 bytes [3.84 TB]
Logical block size: 512 bytes
Physical block size: 4096 bytes
LU is resource provisioned, LBPRZ=1
Rotation Rate: Solid State Device
Form Factor: 2.5 inches
Logical Unit id: 0x58ce38ee20abca55
Serial number: abc123
Device type: disk
Transport protocol: SAS (SPL-3)
Local Time is: Thu Mar 7 13:55:22 2024 EST
SMART support is: Available - device has SMART capability.
SMART support is: Enabled
Temperature Warning: Disabled or Not Supported
Read Cache is: Enabled
Writeback Cache is: Enabled
=== START OF READ SMART DATA SECTION ===
SMART Health Status: OK
Percentage used endurance indicator: 0%
Current Drive Temperature: 29 C
Drive Trip Temperature: 70 C
Manufactured in week 33 of year 2019
Elements in grown defect list: 2
Error counter log:
Errors Corrected by Total Correction Gigabytes Total
ECC rereads/ errors algorithm processed uncorrected
fast | delayed rewrites corrected invocations [10^9 bytes] errors
read: 0 0 0 0 0 27081.068 0
write: 0 0 0 0 0 8041.818 0
verify: 0 0 0 0 0 23058.613 0
Non-medium error count: 87
SMART Self-test log
Num Test Status segment LifeTime LBA_first_err [SK ASC ASQ]
Description number (hours)
# 1 Background long Completed - 38 - [- - -]
# 2 Background short Completed - 37 - [- - -]
# 3 Background long Completed - 14 - [- - -]
# 4 Background short Completed - 14 - [- - -]
Long (extended) Self-test duration: 300 seconds [5.0 minutes]
Background scan results log
Status: no scans active
Accumulated power on time, hours:minutes 1169:17 [70157 minutes]
Number of background scans performed: 0, scan progress: 0.00%
Number of background medium scans performed: 0
Protocol Specific port log page for SAS SSP
relative target port id = 1
generation code = 4
number of phys = 1
phy identifier = 0
attached device type: SAS or SATA device
attached reason: unknown
reason: loss of dword synchronization
negotiated logical link rate: phy enabled; 12 Gbps
attached initiator port: ssp=1 stp=1 smp=1
attached target port: ssp=0 stp=0 smp=0
SAS address = 0x58ce38ee20abca56
attached SAS address = 0x52cea7f048bd6b07
attached phy identifier = 1
Invalid DWORD count = 12
Running disparity error count = 12
Loss of DWORD synchronization = 3
Phy reset problem = 0
relative target port id = 2
generation code = 4
number of phys = 1
phy identifier = 1
attached device type: no device attached
attached reason: unknown
reason: unknown
negotiated logical link rate: phy enabled; unknown
attached initiator port: ssp=0 stp=0 smp=0
attached target port: ssp=0 stp=0 smp=0
SAS address = 0x58ce38ee20abca57
attached SAS address = 0x0
attached phy identifier = 0
Invalid DWORD count = 0
Running disparity error count = 0
Loss of DWORD synchronization = 0
Phy reset problem = 0