我在 Dell R720xd 和 PERC H710P 上的 MegaCli 中收到奇怪的 SMART 错误，这些硬盘上有五个 4Tb SATA 硬盘，组成 RAID5
/opt/MegaRAID/MegaCli/MegaCli64 -PDList -aALL
给我一些“失败序列事件编号”
Slot Number: 4
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Last Predictive Failure Event Seq Number: 7309
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Inquiry Data: PK2361PAGAZU8WHitachi HUS724040ALE640 MJAOA3B0
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Drive has flagged a S.M.A.R.T alert : Yes
但是 smartctl 根本没有提供任何有关驱动器问题的线索：
# smartctl -a -d sat+megaraid,4 /dev/sda
smartctl 5.42 2011-10-20 r3458 [x86_64-linux-2.6.32-279.19.1.el6.x86_64] (local build)
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Serial Number: PK2361PAGAZU8W # Note same serial, no mistake
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SMART support is: Available - device has SMART capability.
SMART support is: Enabled
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=== START OF READ SMART DATA SECTION ===
SMART overall-health self-assessment test result: PASSED
Warning: This result is based on an Attribute check.
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Vendor Specific SMART Attributes with Thresholds:
ID# ATTRIBUTE_NAME FLAG VALUE WORST THRESH TYPE UPDATED WHEN_FAILED RAW_VALUE
1 Raw_Read_Error_Rate 0x000b 100 100 016 Pre-fail Always - 0
2 Throughput_Performance 0x0005 137 137 054 Pre-fail Offline - 79
3 Spin_Up_Time 0x0007 100 100 024 Pre-fail Always - 426
4 Start_Stop_Count 0x0012 100 100 000 Old_age Always - 7
5 Reallocated_Sector_Ct 0x0033 100 100 005 Pre-fail Always - 0
7 Seek_Error_Rate 0x000b 100 100 067 Pre-fail Always - 0
8 Seek_Time_Performance 0x0005 114 114 020 Pre-fail Offline - 37
9 Power_On_Hours 0x0012 100 100 000 Old_age Always - 4912
10 Spin_Retry_Count 0x0013 100 100 060 Pre-fail Always - 0
12 Power_Cycle_Count 0x0032 100 100 000 Old_age Always - 7
192 Power-Off_Retract_Count 0x0032 100 100 000 Old_age Always - 182
193 Load_Cycle_Count 0x0012 100 100 000 Old_age Always - 182
194 Temperature_Celsius 0x0002 176 176 000 Old_age Always - 34 (Min/Max 19/40)
196 Reallocated_Event_Count 0x0032 100 100 000 Old_age Always - 0
197 Current_Pending_Sector 0x0022 100 100 000 Old_age Always - 0
198 Offline_Uncorrectable 0x0008 100 100 000 Old_age Offline - 0
199 UDMA_CRC_Error_Count 0x000a 200 200 000 Old_age Always - 0
SMART Error Log Version: 1
No Errors Logged
没有理由对上述内容不以为然。
进行了简短的自我测试，没有发现任何问题，现在开始长期测试：
Serial Number: PK2331PAG7EENT
SMART Self-test log structure revision number 1
Num Test_Description Status Remaining LifeTime(hours) LBA_of_first_error
# 1 Short offline Completed without error 00% 4911 -
与此同时，同一阵列中有一个磁盘有 39 个重新分配的扇区，而 PERC 并没有将其标记为即将发生故障。smartctl 输出如下：
Serial Number: PK2331PAG7EENT
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ID# ATTRIBUTE_NAME FLAG VALUE WORST THRESH TYPE UPDATED WHEN_FAILED RAW_VALUE
5 Reallocated_Sector_Ct 0x0033 100 100 005 Pre-fail Always - 39
MegaCli64 输出了同一磁盘的 39 个重新分配扇区：
Slot Number: 0
Last Predictive Failure Event Seq Number: 0
Inquiry Data: PK2331PAG7EENTHitachi HUS724040ALE640 MJAOA3B0
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Drive has flagged a S.M.A.R.T alert : No
MegaRAID Storage Manager 的报告也没有什么启发性：
ID = 113
SEQUENCE NUMBER = 7310
TIME = 11-07-2013 20:58:01
LOCALIZED MESSAGE = Controller ID: 0 Unexpected sense: PD = -:-:4Hardware impending failure general hard drive failure, CDB = 0x03 0x00 0x00 0x00 0x40 0x00 , Sense = 0xf0 0x00 0x00 0x00 0x00 0x00 0x00 0x0a 0x00 0x00 0x00 0x00 0x5d 0x10 0x00 0x00 0x00 0x00
ID = 96
SEQUENCE NUMBER = 7309
TIME = 11-07-2013 20:58:01
LOCALIZED MESSAGE = Controller ID: 0 PD Predictive failure: -:-:4
所以磁盘看起来很健康，有什么想法可以重置 SMART 警报吗？我认为智能统计数据不足以要求保修。
附言：我们移除了 4 号驱动器，将其插入 5 号驱动器，它显示正常，之前显示为“外部”，这是意料之中的，现在将其指定为全局热备用。将新驱动器放置为 4 号驱动器，然后 RAID 重建卷。戴尔支持建议使用 omconfig 获取更详细的控制器日志。