Basically, I have two WD HDDs in a programmatic RAID1 (no special hardware):
$ lsscsi --verbose
[0:0:0:0] disk ATA WDC WD10EFRX-68F 0A82 /dev/sda
dir: /sys/bus/scsi/devices/0:0:0:0 [/sys/devices/pci0000:00/0000:00:17.0/ata1/host0/target0:0:0/0:0:0:0]
[1:0:0:0] disk ATA WDC WD10EFRX-68F 0A82 /dev/sdb
dir: /sys/bus/scsi/devices/1:0:0:0 [/sys/devices/pci0000:00/0000:00:17.0/ata2/host1/target1:0:0/1:0:0:0]
one of those (/dev/sdb
) started to produce perculiar noise.
I've run the SMART overall-health self-assessment test
with the result: PASSED
, here's the output:
$ sudo smartctl -a /dev/sdb
...
SMART Attributes Data Structure revision number: 16
Vendor Specific SMART Attributes with Thresholds:
ID# ATTRIBUTE_NAME FLAG VALUE WORST THRESH TYPE UPDATED WHEN_FAILED RAW_VALUE
1 Raw_Read_Error_Rate 0x002f 200 200 051 Pre-fail Always - 0
3 Spin_Up_Time 0x0027 131 129 021 Pre-fail Always - 4450
4 Start_Stop_Count 0x0032 100 100 000 Old_age Always - 201
5 Reallocated_Sector_Ct 0x0033 200 200 140 Pre-fail Always - 0
7 Seek_Error_Rate 0x002e 100 253 000 Old_age Always - 0
9 Power_On_Hours 0x0032 075 075 000 Old_age Always - 18349
10 Spin_Retry_Count 0x0032 100 100 000 Old_age Always - 0
11 Calibration_Retry_Count 0x0032 100 100 000 Old_age Always - 0
12 Power_Cycle_Count 0x0032 100 100 000 Old_age Always - 201
192 Power-Off_Retract_Count 0x0032 200 200 000 Old_age Always - 135
193 Load_Cycle_Count 0x0032 191 191 000 Old_age Always - 29322
194 Temperature_Celsius 0x0022 112 101 000 Old_age Always - 31
196 Reallocated_Event_Count 0x0032 200 200 000 Old_age Always - 0
197 Current_Pending_Sector 0x0032 200 200 000 Old_age Always - 0
198 Offline_Uncorrectable 0x0030 100 253 000 Old_age Offline - 0
199 UDMA_CRC_Error_Count 0x0032 200 200 000 Old_age Always - 0
200 Multi_Zone_Error_Rate 0x0008 100 253 000 Old_age Offline - 0
SMART Error Log Version: 1
No Errors Logged
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% 0 -
Looks okaish, right? Please note, this RAID is inside a server with big uptime, I believe, I hadn't checked it for something like 70 days, it was working just fine, so when I got to it in person I heard the unheard sound and turned it off.
QUESTIONS:
Here's the sound of my HDD (it does not click, only produces sawing-like noise, the clicks are made by me moving), what could this be?
Is it "safe" to run
sudo smartctl -t short /dev/sdb
? One answer states it is "as safe as continuing using a failed drive", however my question here is not addressed to something obvious but to the issue of RAID - can linux do something undesired while checking single drive from a mounted RAID? From an unmounted one? Does it turn off the power for a short period of time for the test? May the test affect both drives?