So far the NAS storage is used at 34%.
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Filesystem Size Used Avail Use% Mounted on
/dev/sda1 9.1T 2.9T 5.8T 34% /mnt/storagehc2a is the "active" NAS.
hc2b syncs from hc2a every "active" hour, from early morning to late evening.
hc2c is manually synced on demand every few days or once a week.
As of this writing the 3 x HC2 have been working with zero issue. Kudos to Hard Kernel engineers!
I manually apt update them every few months. They are not exposed to the Internet. I usually upgrade hc2c and if it reboots normally, I then upgrade hc2b and if it reboots normally, I finally upgrade hc2a. In doing so, I always has at least one NAS running if a problem were to occur.
Because the Power-Off_Retract_Count does not rise at the same rate on each drive, I do not expect the disks to die at the same time.
The systems have now been running for about 3.2 years
Statistics for each drive:
hc2a
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domih@hc2a:~$ sudo smartctl -d sat -a /dev/sda
...
Device Model: WDC WD100EFAX-68LHPN0
...
Rotation Rate: 5400 rpm
Form Factor: 3.5 inches
...
ID# ATTRIBUTE_NAME FLAG VALUE WORST THRESH TYPE UPDATED WHEN_FAILED RAW_VALUE
...
9 Power_On_Hours 0x0012 096 096 000 Old_age Always - 28067
...
12 Power_Cycle_Count 0x0032 100 100 000 Old_age Always - 38
...
192 Power-Off_Retract_Count 0x0032 086 086 000 Old_age Always - 17795
193 Load_Cycle_Count 0x0012 086 086 000 Old_age Always - 17795
194 Temperature_Celsius 0x0002 180 180 000 Old_age Always - 36 (Min/Max 20/49)
...
SMART Error Log Version: 1
No Errors Logged
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domih@hc2b:~$ sudo smartctl -d sat -a /dev/sda
...
Device Model: WDC WD100EFAX-68LHPN0
...
Rotation Rate: 5400 rpm
Form Factor: 3.5 inches
...
ID# ATTRIBUTE_NAME FLAG VALUE WORST THRESH TYPE UPDATED WHEN_FAILED RAW_VALUE
...
9 Power_On_Hours 0x0012 097 097 000 Old_age Always - 27969
...
12 Power_Cycle_Count 0x0032 100 100 000 Old_age Always - 41
...
192 Power-Off_Retract_Count 0x0032 090 090 000 Old_age Always - 12994
193 Load_Cycle_Count 0x0012 090 090 000 Old_age Always - 12994
194 Temperature_Celsius 0x0002 185 185 000 Old_age Always - 35 (Min/Max 21/47)
SMART Error Log Version: 1
ATA Error Count: 2
...
Error 2 occurred at disk power-on lifetime: 15776 hours (657 days + 8 hours)
When the command that caused the error occurred, the device was active or idle.
...
Error 1 occurred at disk power-on lifetime: 15776 hours (657 days + 8 hours)
When the command that caused the error occurred, the device was active or idle.
...
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% 27969 -
# 2 Short offline Completed without error 00% 2902 -
# 3 Short offline Completed without error 00% 1875 -
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domih@hc2c:~$ sudo smartctl -d sat -a /dev/sda
...
Device Model: WDC WD100EFAX-68LHPN0
...
Rotation Rate: 5400 rpm
Form Factor: 3.5 inches
...
ID# ATTRIBUTE_NAME FLAG VALUE WORST THRESH TYPE UPDATED WHEN_FAILED RAW_VALUE
...
9 Power_On_Hours 0x0012 097 097 000 Old_age Always - 27898
...
12 Power_Cycle_Count 0x0032 100 100 000 Old_age Always - 41
...
192 Power-Off_Retract_Count 0x0032 100 100 000 Old_age Always - 712
193 Load_Cycle_Count 0x0012 100 100 000 Old_age Always - 712
194 Temperature_Celsius 0x0002 180 180 000 Old_age Always - 36 (Min/Max 21/48)
...
SMART Error Log Version: 1
No Errors Logged
