Hello all,
I have strangest situation with iSCSi when used with ESXi. Every now and then we have dropouts which require us to restart the service as all our guest OS's lose their storage and especially Linux boxes go bananas and mount their storage as read-only. I've been looking into this for around 2 weeks now and every time it drops I check the logs and can see lots of entries like this;
I've looked at https://bugs.freenas.org/issues/1531
And taken away a few lessons which have helped reduce the frequency of these issues but still can't shake it off permanently.
The specs of the machine this is running on are as follows;
FreeNAS 9.2.1.6 64-bit
Intel Xeon Quad Core 3.00Ghz (Core 2 Era)
8GB DDR2 ECC Memory
2x 1TB Samsung Evo 840 SSD's
Currently we use ZFS with RAIDing through FreeNAS (If that's how to term it), currently banging my head against a wall on this one. I'm a little bit worried about making changes if I don't understand what it's doing so I've been a little conservative on this one. Any tips?
I have strangest situation with iSCSi when used with ESXi. Every now and then we have dropouts which require us to restart the service as all our guest OS's lose their storage and especially Linux boxes go bananas and mount their storage as read-only. I've been looking into this for around 2 weeks now and every time it drops I check the logs and can see lots of entries like this;
Oct 17 20:00:07 STFreeNAS02 autosnap.py: [tools.autosnap:58] Popen()ing: /sbin/zfs get -H freenas:state volSTSE1SSD01@auto-20141010.2000-1w
Oct 17 20:00:07 STFreeNAS02 autosnap.py: [tools.autosnap:58] Popen()ing: /sbin/zfs destroy -r -d volSTSE1SSD01@auto-20141010.2000-1w
Oct 17 20:00:08 STFreeNAS02 autosnap.py: [tools.autosnap:58] Popen()ing: /sbin/zfs get -H freenas:state volSTSE1SSD01/.system/rrd@auto-20141010.2000-1w
Oct 17 20:00:08 STFreeNAS02 autosnap.py: [tools.autosnap:58] Popen()ing: /sbin/zfs get -H freenas:state volSTSE1SSD01/.system/samba4@auto-20141010.2000-1w
Oct 17 20:00:09 STFreeNAS02 autorepl.py: [common.pipesubr:58] Popen()ing: /usr/bin/ssh -i /data/ssh/replication -o BatchMode=yes -o StrictHostKeyChecking=yes -o ConnectTimeout=7 -p 22 192.168.105.7 "zfs list -Hr -o name -t snapshot -d 1 volSTSE1SATA01 | tail -n 1 | cut -d@ -f2"
Oct 17 20:02:13 STFreeNAS02 istgt[38934]: istgt_lu_disk.c:5318:istgt_lu_disk_queue_start: ***WARNING*** transfer abort CmdSN=65962579
Oct 17 20:02:13 STFreeNAS02 istgt[38934]: istgt_lu.c:3255:luworker: ***WARNING*** LU1: lu_disk_queue_start() aborted
Oct 17 20:02:13 STFreeNAS02 istgt[38934]: istgt_iscsi.c:4764:istgt_iscsi_transfer_out: ***ERROR*** iscsi_read_pdu() failed, r2t_sent=0
Oct 17 20:02:13 STFreeNAS02 istgt[38934]: istgt_iscsi.c:5852:worker: ***ERROR*** iscsi_task_transfer_out() failed on iqn.2013-03.stellarise.com.istgt:freenas02,t,0x0001(iqn.1998-01.com.vmware:localhost-174aa83d,i,0x00023d000001)
Oct 17 20:02:16 STFreeNAS02 istgt[38934]: istgt_iscsi.c:6749:istgt_iscsi_drop_old_conns: ***WARNING*** drop old connections iqn.2013-03.stellarise.com.istgt:freenas02 by iqn.1998-01.com.vmware:localhost-174aa83d,i,0x00023d000001
Oct 17 20:02:20 STFreeNAS02 istgt[38934]: Login from iqn.1998-01.com.vmware:localhost-174aa83d (192.168.105.6) on iqn.2013-03.stellarise.com.istgt:freenas02 LU1 (192.168.105.8:3260,1), ISID=23d000001, TSIH=3, CID=0, HeaderDigest=off, DataDigest=off
Oct 17 20:02:50 STFreeNAS02 istgt[38934]: istgt_lu_disk.c:5318:istgt_lu_disk_queue_start: ***WARNING*** transfer abort CmdSN=65964200
Oct 17 20:02:50 STFreeNAS02 istgt[38934]: istgt_lu.c:3255:luworker: ***WARNING*** LU1: lu_disk_queue_start() aborted
Oct 17 20:02:54 STFreeNAS02 istgt[38934]: istgt_iscsi.c:6749:istgt_iscsi_drop_old_conns: ***WARNING*** drop old connections iqn.2013-03.stellarise.com.istgt:freenas02 by iqn.1998-01.com.vmware:localhost-174aa83d,i,0x00023d000001
Oct 17 20:02:58 STFreeNAS02 istgt[38934]: Login from iqn.1998-01.com.vmware:localhost-174aa83d (192.168.105.6) on iqn.2013-03.stellarise.com.istgt:freenas02 LU1 (192.168.105.8:3260,1), ISID=23d000001, TSIH=4, CID=0, HeaderDigest=off, DataDigest=off
Oct 17 20:03:35 STFreeNAS02 istgt[38934]: istgt_lu_disk.c:5318:istgt_lu_disk_queue_start: ***WARNING*** transfer abort CmdSN=65967163
Oct 17 20:03:36 STFreeNAS02 istgt[38934]: istgt_lu.c:3255:luworker: ***WARNING*** LU1: lu_disk_queue_start() aborted
Oct 17 20:03:36 STFreeNAS02 istgt[38934]: istgt_lu_disk.c:5318:istgt_lu_disk_queue_start: ***WARNING*** transfer abort CmdSN=65967164
Oct 17 20:03:36 STFreeNAS02 istgt[38934]: istgt_lu.c:3255:luworker: ***WARNING*** LU1: lu_disk_queue_start() aborted
Oct 17 20:03:36 STFreeNAS02 istgt[38934]: istgt_iscsi.c:4764:istgt_iscsi_transfer_out: ***ERROR*** iscsi_read_pdu() failed, r2t_sent=0
Oct 17 20:03:36 STFreeNAS02 istgt[38934]: istgt_iscsi.c:5852:worker: ***ERROR*** iscsi_task_transfer_out() failed on iqn.2013-03.stellarise.com.istgt:freenas02,t,0x0001(iqn.1998-01.com.vmware:localhost-174aa83d,i,0x00023d000001)
Oct 17 20:03:36 STFreeNAS02 istgt[38934]: istgt_lu_disk.c:5318:istgt_lu_disk_queue_start: ***WARNING*** transfer abort CmdSN=65967165
Oct 17 20:03:36 STFreeNAS02 istgt[38934]: istgt_lu.c:3255:luworker: ***WARNING*** LU1: lu_disk_queue_start() aborted
Oct 17 20:03:39 STFreeNAS02 istgt[38934]: istgt_iscsi.c:6749:istgt_iscsi_drop_old_conns: ***WARNING*** drop old connections iqn.2013-03.stellarise.com.istgt:freenas02 by iqn.1998-01.com.vmware:localhost-174aa83d,i,0x00023d000001
Oct 17 20:03:40 STFreeNAS02 istgt[38934]: Login from iqn.1998-01.com.vmware:localhost-174aa83d (192.168.105.6) on iqn.2013-03.stellarise.com.istgt:freenas02 LU1 (192.168.105.8:3260,1), ISID=23d000001, TSIH=5, CID=0, HeaderDigest=off, DataDigest=off
Oct 17 20:04:29 STFreeNAS02 istgt[38934]: istgt_iscsi.c:4764:istgt_iscsi_transfer_out: ***ERROR*** iscsi_read_pdu() failed, r2t_sent=0
Oct 17 20:04:29 STFreeNAS02 istgt[38934]: istgt_iscsi.c:5852:worker: ***ERROR*** iscsi_task_transfer_out() failed on iqn.2013-03.stellarise.com.istgt:freenas02,t,0x0001(iqn.1998-01.com.vmware:localhost-174aa83d,i,0x00023d000001)
Oct 17 20:04:29 STFreeNAS02 istgt[38934]: istgt_lu_disk.c:5318:istgt_lu_disk_queue_start: ***WARNING*** transfer abort CmdSN=65972008
Oct 17 20:04:29 STFreeNAS02 istgt[38934]: istgt_lu.c:3255:luworker: ***WARNING*** LU1: lu_disk_queue_start() aborted
Oct 17 20:04:32 STFreeNAS02 istgt[38934]: istgt_iscsi.c:6749:istgt_iscsi_drop_old_conns: ***WARNING*** drop old connections iqn.2013-03.stellarise.com.istgt:freenas02 by iqn.1998-01.com.vmware:localhost-174aa83d,i,0x00023d000001
Oct 17 20:04:33 STFreeNAS02 istgt[38934]: Login from iqn.1998-01.com.vmware:localhost-174aa83d (192.168.105.6) on iqn.2013-03.stellarise.com.istgt:freenas02 LU1 (192.168.105.8:3260,1), ISID=23d000001, TSIH=6, CID=0, HeaderDigest=off, DataDigest=off
Oct 17 20:05:17 STFreeNAS02 istgt[38934]: istgt_iscsi.c:4764:istgt_iscsi_transfer_out: ***ERROR*** iscsi_read_pdu() failed, r2t_sent=0
Oct 17 20:05:17 STFreeNAS02 istgt[38934]: istgt_iscsi.c:5852:worker: ***ERROR*** iscsi_task_transfer_out() failed on iqn.2013-03.stellarise.com.istgt:freenas02,t,0x0001(iqn.1998-01.com.vmware:localhost-174aa83d,i,0x00023d000001)
Oct 17 20:05:17 STFreeNAS02 istgt[38934]: istgt_lu_disk.c:5318:istgt_lu_disk_queue_start: ***WARNING*** transfer abort CmdSN=65972589
Oct 17 20:05:17 STFreeNAS02 istgt[38934]: istgt_lu.c:3255:luworker: ***WARNING*** LU1: lu_disk_queue_start() aborted
Oct 17 20:05:20 STFreeNAS02 istgt[38934]: istgt_iscsi.c:6749:istgt_iscsi_drop_old_conns: ***WARNING*** drop old connections iqn.2013-03.stellarise.com.istgt:freenas02 by iqn.1998-01.com.vmware:localhost-174aa83d,i,0x00023d000001
Oct 17 20:05:21 STFreeNAS02 istgt[38934]: Login from iqn.1998-01.com.vmware:localhost-174aa83d (192.168.105.6) on iqn.2013-03.stellarise.com.istgt:freenas02 LU1 (192.168.105.8:3260,1), ISID=23d000001, TSIH=7, CID=0, HeaderDigest=off, DataDigest=off
Oct 17 20:05:49 STFreeNAS02 autorepl.py: [common.pipesubr:58] Popen()ing: /usr/bin/ssh -i /data/ssh/replication -o BatchMode=yes -o StrictHostKeyChecking=yes -o ConnectTimeout=7 -p 22 192.168.105.7 "zfs list -Hr -o name -t snapshot -d 1 volSTSE1SATA01 | tail -n 1 | cut -d@ -f2"
Oct 17 20:05:50 STFreeNAS02 autorepl.py: [common.pipesubr:72] Executing: /usr/bin/ssh -i /data/ssh/replication -o BatchMode=yes -o StrictHostKeyChecking=yes -o ConnectTimeout=7 -p 22 192.168.105.7 "/sbin/zfs inherit freenas:state volSTSE1SATA01@auto-20141017.2000-1w"
Oct 17 20:05:50 STFreeNAS02 autorepl.py: [common.pipesubr:72] Executing: /sbin/zfs inherit freenas:state volSTSE1SSD01@auto-20141017.1930-1w
Oct 17 20:05:50 STFreeNAS02 autorepl.py: [common.pipesubr:72] Executing: /sbin/zfs release -r freenas:repl volSTSE1SSD01@auto-20141017.1930-1w
Oct 17 20:05:50 STFreeNAS02 autorepl.py: [common.pipesubr:72] Executing: /sbin/zfs set freenas:state=LATEST volSTSE1SSD01@auto-20141017.2000-1w
Oct 17 20:05:51 STFreeNAS02 autorepl.py: [common.pipesubr:72] Executing: /sbin/zfs hold -r freenas:repl volSTSE1SSD01@auto-20141017.2000-1w
Oct 17 20:05:51 STFreeNAS02 common.pipesubr: cannot hold snapshot 'volSTSE1SSD01@auto-20141017.2000-1w': tag already exists on this dataset
Oct 17 20:05:51 STFreeNAS02 autorepl.py: [common.pipesubr:58] Popen()ing: /usr/bin/ssh -i /data/ssh/replication -o BatchMode=yes -o StrictHostKeyChecking=yes -o ConnectTimeout=7 -p 22 192.168.105.7 "zfs list -Hr -o name -t snapshot -d 1 volSTSE1SATA02 | tail -n 1 | cut -d@ -f2"
Oct 17 20:00:07 STFreeNAS02 autosnap.py: [tools.autosnap:58] Popen()ing: /sbin/zfs destroy -r -d volSTSE1SSD01@auto-20141010.2000-1w
Oct 17 20:00:08 STFreeNAS02 autosnap.py: [tools.autosnap:58] Popen()ing: /sbin/zfs get -H freenas:state volSTSE1SSD01/.system/rrd@auto-20141010.2000-1w
Oct 17 20:00:08 STFreeNAS02 autosnap.py: [tools.autosnap:58] Popen()ing: /sbin/zfs get -H freenas:state volSTSE1SSD01/.system/samba4@auto-20141010.2000-1w
Oct 17 20:00:09 STFreeNAS02 autorepl.py: [common.pipesubr:58] Popen()ing: /usr/bin/ssh -i /data/ssh/replication -o BatchMode=yes -o StrictHostKeyChecking=yes -o ConnectTimeout=7 -p 22 192.168.105.7 "zfs list -Hr -o name -t snapshot -d 1 volSTSE1SATA01 | tail -n 1 | cut -d@ -f2"
Oct 17 20:02:13 STFreeNAS02 istgt[38934]: istgt_lu_disk.c:5318:istgt_lu_disk_queue_start: ***WARNING*** transfer abort CmdSN=65962579
Oct 17 20:02:13 STFreeNAS02 istgt[38934]: istgt_lu.c:3255:luworker: ***WARNING*** LU1: lu_disk_queue_start() aborted
Oct 17 20:02:13 STFreeNAS02 istgt[38934]: istgt_iscsi.c:4764:istgt_iscsi_transfer_out: ***ERROR*** iscsi_read_pdu() failed, r2t_sent=0
Oct 17 20:02:13 STFreeNAS02 istgt[38934]: istgt_iscsi.c:5852:worker: ***ERROR*** iscsi_task_transfer_out() failed on iqn.2013-03.stellarise.com.istgt:freenas02,t,0x0001(iqn.1998-01.com.vmware:localhost-174aa83d,i,0x00023d000001)
Oct 17 20:02:16 STFreeNAS02 istgt[38934]: istgt_iscsi.c:6749:istgt_iscsi_drop_old_conns: ***WARNING*** drop old connections iqn.2013-03.stellarise.com.istgt:freenas02 by iqn.1998-01.com.vmware:localhost-174aa83d,i,0x00023d000001
Oct 17 20:02:20 STFreeNAS02 istgt[38934]: Login from iqn.1998-01.com.vmware:localhost-174aa83d (192.168.105.6) on iqn.2013-03.stellarise.com.istgt:freenas02 LU1 (192.168.105.8:3260,1), ISID=23d000001, TSIH=3, CID=0, HeaderDigest=off, DataDigest=off
Oct 17 20:02:50 STFreeNAS02 istgt[38934]: istgt_lu_disk.c:5318:istgt_lu_disk_queue_start: ***WARNING*** transfer abort CmdSN=65964200
Oct 17 20:02:50 STFreeNAS02 istgt[38934]: istgt_lu.c:3255:luworker: ***WARNING*** LU1: lu_disk_queue_start() aborted
Oct 17 20:02:54 STFreeNAS02 istgt[38934]: istgt_iscsi.c:6749:istgt_iscsi_drop_old_conns: ***WARNING*** drop old connections iqn.2013-03.stellarise.com.istgt:freenas02 by iqn.1998-01.com.vmware:localhost-174aa83d,i,0x00023d000001
Oct 17 20:02:58 STFreeNAS02 istgt[38934]: Login from iqn.1998-01.com.vmware:localhost-174aa83d (192.168.105.6) on iqn.2013-03.stellarise.com.istgt:freenas02 LU1 (192.168.105.8:3260,1), ISID=23d000001, TSIH=4, CID=0, HeaderDigest=off, DataDigest=off
Oct 17 20:03:35 STFreeNAS02 istgt[38934]: istgt_lu_disk.c:5318:istgt_lu_disk_queue_start: ***WARNING*** transfer abort CmdSN=65967163
Oct 17 20:03:36 STFreeNAS02 istgt[38934]: istgt_lu.c:3255:luworker: ***WARNING*** LU1: lu_disk_queue_start() aborted
Oct 17 20:03:36 STFreeNAS02 istgt[38934]: istgt_lu_disk.c:5318:istgt_lu_disk_queue_start: ***WARNING*** transfer abort CmdSN=65967164
Oct 17 20:03:36 STFreeNAS02 istgt[38934]: istgt_lu.c:3255:luworker: ***WARNING*** LU1: lu_disk_queue_start() aborted
Oct 17 20:03:36 STFreeNAS02 istgt[38934]: istgt_iscsi.c:4764:istgt_iscsi_transfer_out: ***ERROR*** iscsi_read_pdu() failed, r2t_sent=0
Oct 17 20:03:36 STFreeNAS02 istgt[38934]: istgt_iscsi.c:5852:worker: ***ERROR*** iscsi_task_transfer_out() failed on iqn.2013-03.stellarise.com.istgt:freenas02,t,0x0001(iqn.1998-01.com.vmware:localhost-174aa83d,i,0x00023d000001)
Oct 17 20:03:36 STFreeNAS02 istgt[38934]: istgt_lu_disk.c:5318:istgt_lu_disk_queue_start: ***WARNING*** transfer abort CmdSN=65967165
Oct 17 20:03:36 STFreeNAS02 istgt[38934]: istgt_lu.c:3255:luworker: ***WARNING*** LU1: lu_disk_queue_start() aborted
Oct 17 20:03:39 STFreeNAS02 istgt[38934]: istgt_iscsi.c:6749:istgt_iscsi_drop_old_conns: ***WARNING*** drop old connections iqn.2013-03.stellarise.com.istgt:freenas02 by iqn.1998-01.com.vmware:localhost-174aa83d,i,0x00023d000001
Oct 17 20:03:40 STFreeNAS02 istgt[38934]: Login from iqn.1998-01.com.vmware:localhost-174aa83d (192.168.105.6) on iqn.2013-03.stellarise.com.istgt:freenas02 LU1 (192.168.105.8:3260,1), ISID=23d000001, TSIH=5, CID=0, HeaderDigest=off, DataDigest=off
Oct 17 20:04:29 STFreeNAS02 istgt[38934]: istgt_iscsi.c:4764:istgt_iscsi_transfer_out: ***ERROR*** iscsi_read_pdu() failed, r2t_sent=0
Oct 17 20:04:29 STFreeNAS02 istgt[38934]: istgt_iscsi.c:5852:worker: ***ERROR*** iscsi_task_transfer_out() failed on iqn.2013-03.stellarise.com.istgt:freenas02,t,0x0001(iqn.1998-01.com.vmware:localhost-174aa83d,i,0x00023d000001)
Oct 17 20:04:29 STFreeNAS02 istgt[38934]: istgt_lu_disk.c:5318:istgt_lu_disk_queue_start: ***WARNING*** transfer abort CmdSN=65972008
Oct 17 20:04:29 STFreeNAS02 istgt[38934]: istgt_lu.c:3255:luworker: ***WARNING*** LU1: lu_disk_queue_start() aborted
Oct 17 20:04:32 STFreeNAS02 istgt[38934]: istgt_iscsi.c:6749:istgt_iscsi_drop_old_conns: ***WARNING*** drop old connections iqn.2013-03.stellarise.com.istgt:freenas02 by iqn.1998-01.com.vmware:localhost-174aa83d,i,0x00023d000001
Oct 17 20:04:33 STFreeNAS02 istgt[38934]: Login from iqn.1998-01.com.vmware:localhost-174aa83d (192.168.105.6) on iqn.2013-03.stellarise.com.istgt:freenas02 LU1 (192.168.105.8:3260,1), ISID=23d000001, TSIH=6, CID=0, HeaderDigest=off, DataDigest=off
Oct 17 20:05:17 STFreeNAS02 istgt[38934]: istgt_iscsi.c:4764:istgt_iscsi_transfer_out: ***ERROR*** iscsi_read_pdu() failed, r2t_sent=0
Oct 17 20:05:17 STFreeNAS02 istgt[38934]: istgt_iscsi.c:5852:worker: ***ERROR*** iscsi_task_transfer_out() failed on iqn.2013-03.stellarise.com.istgt:freenas02,t,0x0001(iqn.1998-01.com.vmware:localhost-174aa83d,i,0x00023d000001)
Oct 17 20:05:17 STFreeNAS02 istgt[38934]: istgt_lu_disk.c:5318:istgt_lu_disk_queue_start: ***WARNING*** transfer abort CmdSN=65972589
Oct 17 20:05:17 STFreeNAS02 istgt[38934]: istgt_lu.c:3255:luworker: ***WARNING*** LU1: lu_disk_queue_start() aborted
Oct 17 20:05:20 STFreeNAS02 istgt[38934]: istgt_iscsi.c:6749:istgt_iscsi_drop_old_conns: ***WARNING*** drop old connections iqn.2013-03.stellarise.com.istgt:freenas02 by iqn.1998-01.com.vmware:localhost-174aa83d,i,0x00023d000001
Oct 17 20:05:21 STFreeNAS02 istgt[38934]: Login from iqn.1998-01.com.vmware:localhost-174aa83d (192.168.105.6) on iqn.2013-03.stellarise.com.istgt:freenas02 LU1 (192.168.105.8:3260,1), ISID=23d000001, TSIH=7, CID=0, HeaderDigest=off, DataDigest=off
Oct 17 20:05:49 STFreeNAS02 autorepl.py: [common.pipesubr:58] Popen()ing: /usr/bin/ssh -i /data/ssh/replication -o BatchMode=yes -o StrictHostKeyChecking=yes -o ConnectTimeout=7 -p 22 192.168.105.7 "zfs list -Hr -o name -t snapshot -d 1 volSTSE1SATA01 | tail -n 1 | cut -d@ -f2"
Oct 17 20:05:50 STFreeNAS02 autorepl.py: [common.pipesubr:72] Executing: /usr/bin/ssh -i /data/ssh/replication -o BatchMode=yes -o StrictHostKeyChecking=yes -o ConnectTimeout=7 -p 22 192.168.105.7 "/sbin/zfs inherit freenas:state volSTSE1SATA01@auto-20141017.2000-1w"
Oct 17 20:05:50 STFreeNAS02 autorepl.py: [common.pipesubr:72] Executing: /sbin/zfs inherit freenas:state volSTSE1SSD01@auto-20141017.1930-1w
Oct 17 20:05:50 STFreeNAS02 autorepl.py: [common.pipesubr:72] Executing: /sbin/zfs release -r freenas:repl volSTSE1SSD01@auto-20141017.1930-1w
Oct 17 20:05:50 STFreeNAS02 autorepl.py: [common.pipesubr:72] Executing: /sbin/zfs set freenas:state=LATEST volSTSE1SSD01@auto-20141017.2000-1w
Oct 17 20:05:51 STFreeNAS02 autorepl.py: [common.pipesubr:72] Executing: /sbin/zfs hold -r freenas:repl volSTSE1SSD01@auto-20141017.2000-1w
Oct 17 20:05:51 STFreeNAS02 common.pipesubr: cannot hold snapshot 'volSTSE1SSD01@auto-20141017.2000-1w': tag already exists on this dataset
Oct 17 20:05:51 STFreeNAS02 autorepl.py: [common.pipesubr:58] Popen()ing: /usr/bin/ssh -i /data/ssh/replication -o BatchMode=yes -o StrictHostKeyChecking=yes -o ConnectTimeout=7 -p 22 192.168.105.7 "zfs list -Hr -o name -t snapshot -d 1 volSTSE1SATA02 | tail -n 1 | cut -d@ -f2"
And taken away a few lessons which have helped reduce the frequency of these issues but still can't shake it off permanently.
The specs of the machine this is running on are as follows;
FreeNAS 9.2.1.6 64-bit
Intel Xeon Quad Core 3.00Ghz (Core 2 Era)
8GB DDR2 ECC Memory
2x 1TB Samsung Evo 840 SSD's
Currently we use ZFS with RAIDing through FreeNAS (If that's how to term it), currently banging my head against a wall on this one. I'm a little bit worried about making changes if I don't understand what it's doing so I've been a little conservative on this one. Any tips?