devmap.py

#!/usr/bin/env python2
from __future__ import print_function
import re
import subprocess
import libzfs

def get_disk_info(dev):
    result = subprocess.check_output(["camcontrol", "identify", dev])
    serial = re.compile("serial number[ ]+ ([^\n]+)").findall(result)[0]
    model = re.compile("device model[ ]+ ([^\n]+)").findall(result)[0]
    return serial, model

regex = re.compile("gptid/([^ ]+)[ ]+N/A[ ]+([ad]+[\d]+)p([\d]+)")


pools = list(libzfs.ZFS().pools)
for pool in pools:
    print("Pool: {}".format(pool.name))
    gptids = subprocess.check_output(["glabel","status"])
    partitions = regex.findall(gptids)

    for disk in pool.disks:
        if "gptid" in disk:
            pool_disk_gptid = disk.split("/")[3].lower()
            found=False
            for gptid, pool_disk_dev, part in partitions:
                if pool_disk_gptid == gptid:
                    print("  gptid: {}".format(pool_disk_gptid))
                    
                    pool_disk_dev = "/dev/"+pool_disk_dev
                    found=True
                    break
            if not found:
                continue
        else:
            print("  gptid: N/A")
            pool_disk_dev, part    = disk.split("p")
            
        serial, model = get_disk_info(pool_disk_dev)
        print("    Dev: {}p{}".format(pool_disk_dev, part))
        print("    Model: {}".format(model))
        print("    Serial: {}".format(serial))
    print("")

Dumps all the disk model and serial number for all zfs pools. Tested on FreeBSD freenas.lan 10.3-STABLE FreeBSD 10.3-STABLE #0 r295946+07c41cd(9.10-STABLE)

Sample output:

Pool: tank
  gptid: N/A
    Dev: /dev/ada11p4
    Model: ST3000DM001-1CH166
    Serial: [truncated]
  gptid: N/A
    Dev: /dev/ada3p3
    Model: WDC WD30EFRX-68EUZN0
    Serial: WD-[truncated]
  gptid: 8b17cca0-5d65-11e6-bcf4-001e68044a5e
    Dev: /dev/ada0p2
    Model: WDC WD30EFRX-68EUZN0
    Serial: WD-[truncated]