ZFS System become slow, hard drive failure?

B

bxbzq

Ok, so it is FreeBSD 14.3 on a ZFS based single disk pool. Lately I accidentally noticed It's been very slow when logging in. I don't know since when it became this bad because it serves a backup VPS whose load is low and I don't pay attention to it.
Code: 
% sudo  zpool status -xv
  pool: zroot
 state: ONLINE
status: One or more devices has experienced an error resulting in data
        corruption.  Applications may be affected.
action: Restore the file in question if possible.  Otherwise restore the
        entire pool from backup.
   see: [URL]https://openzfs.github.io/openzfs-docs/msg/ZFS-8000-8A[/URL]
remove: Removal of vdev 1 copied 344K in 0h0m, completed on Thu Jun  8 14:02:16 2023
        240 memory used for removed device mappings
config:

        NAME          STATE     READ WRITE CKSUM
        zroot         ONLINE       0     0     0
          ada0p3      ONLINE       0     0     0

errors: Permanent errors have been detected in the following files:

        //var/run/devd.pid

Luckily the OS still boots.

Not sure if it makes sense, but I check .zfs/snapshot/2025-05-07-15:01:10-0/var/run/devd.pid, and compare it with /var/run/devd.pid. Both devd.pid files contain very simple 3-digit numbers.

Is this a hard drive failure? Can I still fix it?
 
#pkg install smartmontools
# pkg info smartmontools
smartmontools-7.5_1
Name : smartmontools
Version : 7.5_1

You can use smartmontools ,
binary is /usr/local/sbin/smartctl

# smartctl -HA /dev/ada0

to dump the SATA drives error counters.

Look for reallocated sectors , number of failed but not relaocated sectors and UDMA errors
If those numbers are substantial , hundreds to thousands , the drive is failing and not safe to use.
 
drsnx60 said:
#pkg install smartmontools
# pkg info smartmontools
smartmontools-7.5_1
Name : smartmontools
Version : 7.5_1

You can use smartmontools ,
binary is /usr/local/sbin/smartctl

# smartctl -HA /dev/ada0

to dump the SATA drives error counters.

Look for reallocated sectors , number of failed but not relaocated sectors and UDMA errors
If those numbers are substantial , hundreds to thousands , the drive is failing and not safe to use.
Click to expand...

Like this?
# smartctl -HA /dev/ada0
smartctl 7.5 2025-04-30 r5714 [FreeBSD 14.3-RELEASE-p2 amd64] (local build)
Copyright (C) 2002-25, Bruce Allen, Christian Franke, www.smartmontools.org

=== START OF READ SMART DATA SECTION ===
SMART overall-health self-assessment test result: PASSED

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 148 144 021 Pre-fail Always - 3575
4 Start_Stop_Count 0x0032 095 095 000 Old_age Always - 5319
5 Reallocated_Sector_Ct 0x0033 200 200 140 Pre-fail Always - 0
7 Seek_Error_Rate 0x002e 200 200 000 Old_age Always - 0
9 Power_On_Hours 0x0032 033 033 000 Old_age Always - 49478
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 095 095 000 Old_age Always - 5316
192 Power-Off_Retract_Count 0x0032 200 200 000 Old_age Always - 148
193 Load_Cycle_Count 0x0032 001 001 000 Old_age Always - 4627290
194 Temperature_Celsius 0x0022 107 097 000 Old_age Always - 36
196 Reallocated_Event_Count 0x0032 200 200 000 Old_age Always - 0
197 Current_Pending_Sector 0x0032 190 190 000 Old_age Always - 817
198 Offline_Uncorrectable 0x0030 200 200 000 Old_age Offline - 0
199 UDMA_CRC_Error_Count 0x0032 200 200 000 Old_age Always - 0
200 Multi_Zone_Error_Rate 0x0008 200 200 000 Old_age Offline - 0
 
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