After few days running, my DEC750 freeze.
Console port says something about
zfs: WARNING: Pool 'zroot' has encoutered an uncorrectable I/O failure and has been suspended
AI help me to check temperature was too high, so I changed place and now it seems to be ok (according to os-smart: max 68°C)
Anybody have an idea how to troubleshoot (console is not usable) ?
Your SSD might be failing. Run a long SMART test. Also run a zpool scrub.
I did many tests and there is no failure. AI suspected too much write on it, then I reduced rules log, rddtools and some settings.
Let see for next tests
Quote from: droumanet on September 02, 2026, 10:44:37 AM[...]AI suspected too much write on it[...]
"Services: SMART" -> "Info", "Info type" = "Attributes", "View". Anything out of nominal? I have most rule logging enabled, and show 2.3TB written over nearly two years.
It seems I've 12 TB in less than one year. Main of them are Outbound DNS level 3 (down to level 2).
This morning, here are statistics:
=== START OF SMART DATA SECTION ===
SMART/Health Information (NVMe Log 0x02, NSID 0xffffffff)
Critical Warning: 0x00
Temperature: 52 Celsius
Available Spare: 100%
Available Spare Threshold: 10%
Percentage Used: 13%
Data Units Read: 662,615 [339 GB]
Data Units Written: 24,519,123 [12.5 TB]
Host Read Commands: 4,037,958
Host Write Commands: 465,833,667
Controller Busy Time: 4,513,538
Power Cycles: 30
Power On Hours: 4,677
Unsafe Shutdowns: 24
Media and Data Integrity Errors: 0
Error Information Log Entries: 0
Warning Comp. Temperature Time: 0
Critical Comp. Temperature Time: 0
Temperature Sensor 1: 66 Celsius
Temperature Sensor 2: 41 Celsius
Temperature Sensor 3: 52 Celsius
Thermal Temp. 1 Transition Count: 93
Thermal Temp. 1 Total Time: 4478
The main temperature of the firewall (in Dashboard) is 39.1°C, so 66°C for NVMe0 is strange, no?
Passively cooled 66 C is not uncommon. Percentage used is at 13% so you still have more than ten years of specified life at your current write rate.
What model is this? It probably has a TBW (terabytes written) spec of 100 or so.
Thanks Patrick !
You're right, it's a
Transcend TS256GMTE712A (série MTE712A)
I've made some write reduction (outbound DNS, tested rules, etc.) and since that, no more error.
Today
SMART/Health Information Log
============================
Critical Warning State: 0x00
Available spare: 0
Temperature: 0
Device reliability: 0
Read only: 0
Volatile memory backup: 0
Temperature: 325 K, 51.85 C, 125.33 F
Available spare: 100
Available spare threshold: 10
Percentage used: 13
Data units (512,000 byte) read: 858477
Data units written: 24738666
Host read commands: 4822576
Host write commands: 468806337
Controller busy time (minutes): 4513573
Power cycles: 30
Power on hours: 4823
Unsafe shutdowns: 24
Media errors: 0
No. error info log entries: 0
Warning Temp Composite Time: 0
Error Temp Composite Time: 0
Temperature Sensor 1: 340 K, 66.85 C, 152.33 F
Temperature Sensor 2: 315 K, 41.85 C, 107.33 F
Temperature Sensor 3: 325 K, 51.85 C, 125.33 F
Temperature 1 Transition Count: 93
Temperature 2 Transition Count: 0
Total Time For Temperature 1: 4478
Total Time For Temperature 2: 0