Unable to create pool (new to this, please be nice)

[toomanyairmiles]

Each time I attempt to create a pool I get the following error

[EFAULT] Failed to wipe disk ada2: [EFAULT] Command dd if=/dev/zero of=/dev/ada2 bs=1M count=32 failed (code 1): dd: /dev/ada2: Input/output error 1+0 records in 0+0 records out 0 bytes transferred in 0.557837 secs (0 bytes/sec)

I can successfully wipe the disk in the disk manager, but attempts to quick wipe result in this error

Error: [EFAULT] Command dd if=/dev/zero of=/dev/ada2 bs=1M count=32 failed (code 1): dd: /dev/ada2: Input/output error 1+0 records in 0+0 records out 0 bytes transferred in 0.583341 secs (0 bytes/sec)

Online research yields more questions than answers!
Attempting
dd if=/dev/zero of=/dev/ada2 bs=1m oseek=`diskinfo ada2 | awk '{print int($3 / (1024*1024)) - 4;}'`

just results in the same error.

Disks were in an old synology raid 1 array, data is backed up, nothing is at risk.

I have also tried sg_format and gpart destroy.

 

[Kris Moore]

You're sure the disks are OK? After you run into those errors, try looking at "tail /var/log/messages" to see if you find any device IO errors / timeouts, that kind of thing.