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[2.15.38.220]) by smtp.gmail.com with ESMTPSA id w126sm10774349wme.25.2017.10.02.11.28.53 for (version=TLS1 cipher=ECDHE-RSA-AES128-SHA bits=128/128); Mon, 02 Oct 2017 11:28:53 -0700 (PDT) Content-Type: text/plain; charset=us-ascii Mime-Version: 1.0 (Mac OS X Mail 9.3 \(3124\)) Subject: Re: ZFS stalled after some mirror disks were lost From: Ben RUBSON In-Reply-To: <8A189756-028A-465E-9962-D0181FAEBB79@gmail.com> Date: Mon, 2 Oct 2017 20:28:52 +0200 Content-Transfer-Encoding: quoted-printable Message-Id: <953DD379-C03A-4737-BAD8-14BB2DB4AB05@gmail.com> References: <4A0E9EB8-57EA-4E76-9D7E-3E344B2037D2@gmail.com> <71d4416a-3454-df36-adae-34c0b70cd84e@multiplay.co.uk> <8A189756-028A-465E-9962-D0181FAEBB79@gmail.com> To: Freebsd fs X-Mailer: Apple Mail (2.3124) X-BeenThere: freebsd-fs@freebsd.org X-Mailman-Version: 2.1.23 Precedence: list List-Id: Filesystems List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Mon, 02 Oct 2017 18:28:57 -0000 Before disconnecting the targets the pool was online without any issue. > On 02 Oct 2017, at 20:17, Ben RUBSON wrote: >=20 > Unfortunately the command stalls / does not return :/ >=20 >> On 02 Oct 2017, at 20:15, Steven Hartland = wrote: >>=20 >> What does zpool status report when you have disconnected the iscsi = targets? >>=20 >> On 02/10/2017 19:12, Ben RUBSON wrote: >>> Hi, >>>=20 >>> On a FreeBSD 11 server, the following online/healthy zpool : >>>=20 >>> home >>> mirror-0 >>> label/local1 >>> label/local2 >>> label/iscsi1 >>> label/iscsi2 >>> mirror-1 >>> label/local3 >>> label/local4 >>> label/iscsi3 >>> label/iscsi4 >>> cache >>> label/local5 >>> label/local6 >>>=20 >>> A sustained read throughput of 180 MB/s, 45 MB/s on each iscsi disk >>> according to "zpool iostat", nothing on local disks (strange but I >>> noticed that IOs always prefer iscsi disks to local disks). >>> No write IOs. >>>=20 >>> Let's disconnect all iSCSI disks : >>> iscsictl -Ra >>>=20 >>> Expected behavior : >>> IO activity flawlessly continue on local disks. >>>=20 >>> What happened : >>> All IOs stalled, server only answers to IOs are made to its zroot = pool. >>> All commands related to the iSCSI disks (iscsictl), or to ZFS = (zfs/zpool), >>> don't return. >>>=20 >>> Questions : >>> Why this behavior ? >>> How to know what happens ? (/var/log/messages says almost nothing) >>>=20 >>> I already disconnected the iSCSI disks without any issue in the = past, >>> several times, but there were almost no IOs running. >>>=20 >>> Thank you for your help ! >>>=20 >>> Ben >>>=20 >>> _______________________________________________ >>> freebsd-fs@freebsd.org mailing list >>> https://lists.freebsd.org/mailman/listinfo/freebsd-fs >>> To unsubscribe, send any mail to = "freebsd-fs-unsubscribe@freebsd.org" >>=20 >> _______________________________________________ >> freebsd-fs@freebsd.org mailing list >> https://lists.freebsd.org/mailman/listinfo/freebsd-fs >> To unsubscribe, send any mail to "freebsd-fs-unsubscribe@freebsd.org" >=20