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I upgraded a RELENG_13 box from last March to one today to bring in some 
of the zfs bug fixes.  But now I have this warning on a pool that was 
not there before.  But the special devices (two 2TB samsungs) are 512 
according to smartctl ?  Any idea why this warning popped up on the pool 
all of a sudden ? the disks and pool have been the same for a year or so.

# smartctl -a /dev/da4
=== START OF INFORMATION SECTION ===
Model Family:     Samsung based SSDs
Device Model:     Samsung SSD 870 EVO 2TB
Serial Number:    S6PNNM0W619793P
LU WWN Device Id: 5 002538 fc36093bc
Firmware Version: SVT02B6Q
User Capacity:    2,000,398,934,016 bytes [2.00 TB]
Sector Size:      512 bytes logical/physical
Rotation Rate:    Solid State Device


# zpool status zbackup1 -v
   pool: zbackup1
  state: ONLINE
status: One or more devices are configured to use a non-native block size.
         Expect reduced performance.
action: Replace affected devices with devices that support the
         configured block size, or migrate data to a properly configured
         pool.
   scan: scrub repaired 0B in 1 days 12:33:12 with 0 errors on Sun Dec 
10 17:45:06 2023
config:

         NAME                               STATE     READ WRITE CKSUM
         zbackup1                           ONLINE       0 0     0
           raidz1-0                         ONLINE       0 0     0
             diskid/DISK-VAGGPZKLp1         ONLINE       0 0     0
             diskid/DISK-VAHZDXALp1         ONLINE       0 0     0
             diskid/DISK-VAJ0S1DLp1         ONLINE       0 0     0
             diskid/DISK-VAHZRMSLp1         ONLINE       0 0     0
             diskid/DISK-VAHZAN4Lp1         ONLINE       0 0     0
           raidz1-2                         ONLINE       0 0     0
             diskid/DISK-1EJD0HUZp1         ONLINE       0 0     0
             diskid/DISK-1EJD5Y7Zp1         ONLINE       0 0     0
             diskid/DISK-1EK5KGUZp1         ONLINE       0 0     0
             diskid/DISK-1EK112WZp1         ONLINE       0 0     0
         special
           mirror-1                         ONLINE       0 0     0
             diskid/DISK-S6PNNM0W619793Pp1  ONLINE       0 0     0  
block size: 512B configured, 4096B native
             diskid/DISK-S6PNNM0W619816Bp1  ONLINE       0 0     0  
block size: 512B configured, 4096B native

errors: No known data errors




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