前言
对于单盘的SMART信息，可以通过smartctl很容易的获取，但是如果磁盘位于RAID中，如何获得其SMART信息？ 还是使用smartctl
smartctl获取RAID组中磁盘的SMART信息
首先通过LDPDinfo -A0 获取某个盘的Device Id。
对于我们而言，存在一个Critical Disks，通过LDPDinfo查看，有一个盘存在 S.M.A.R.T alert，如下图所示：
PD: 1 Information
Enclosure Device ID: 59
Slot Number: 2
Drive's position: DiskGroup: 0, Span: 0, Arm: 1
Enclosure position: 1
Device Id: 96
WWN: 5000C500595382D0
Sequence Number: 2
Media Error Count: 2
Other Error Count: 1
Predictive Failure Count: 1
Last Predictive Failure Event Seq Number: 38912
PD Type: SAS
我们希望拿到这块盘的SMART信息。那么根据Device Id和盘符/dev/sda可以通过smartctl获取。
smartctl -a -d megaraid,[Device Id] /dev/sda
其输出如下：
root@Storage-07:~# smartctl -a -d megaraid,96 /dev/sda
smartctl 5.41 2011-06-09 r3365 [x86_64-linux-4.1.22-server] (local build)
Copyright (C) 2002-11 by Bruce Allen, http://smartmontools.sourceforge.net
Vendor: SEAGATE
Product: ST3300657SS
Revision: 0008
User Capacity: 300,000,000,000 bytes [300 GB]
Logical block size: 512 bytes
Logical Unit id: 0x5000c500595382d3
Serial number: 6SJ5S9N00000N3038WCB
Device type: disk
Transport protocol: SAS
Local Time is: Wed Jan 25 12:45:13 2017 CST
Device supports SMART and is Enabled
Temperature Warning Enabled
SMART Health Status: FAILURE PREDICTION THRESHOLD EXCEEDED [asc=5d, ascq=0]
Current Drive Temperature: 32 C
Drive Trip Temperature: 68 C
Elements in grown defect list: 2066
Vendor (Seagate) cache information
Blocks sent to initiator = 4027599650
Blocks received from initiator = 2533195074
Blocks read from cache and sent to initiator = 971048126
Number of read and write commands whose size <= segment size = 209910133
Number of read and write commands whose size > segment size = 0
Vendor (Seagate/Hitachi) factory information
number of hours powered up = 8347.20
number of minutes until next internal SMART test = 40
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: 817967014 7436 0 817974450 817974452 4260.902 2
write: 0 0 2 2 3 16814.009 1
verify: 1956 0 0 1956 1956 0.252 0
Non-medium error count: 0
[GLTSD (Global Logging Target Save Disable) set. Enable Save with '-S on']
No self-tests have been logged
Long (extended) Self Test duration: 3200 seconds [53.3 minutes]
可以看到
SMART Health Status: FAILURE PREDICTION THRESHOLD EXCEEDED [asc=5d, ascq=0]
这就是存在Critical Disk的原因。这种情况下一般需要更换磁盘。