[zfs-discuss] zfs test on external USB connected Hard drive =?utf-8?Q?=3D>_?=unstable

Tren Blackburn iam at theendoftime.net
Sat Apr 23 13:27:24 EDT 2016

On April 23, 2016 at 9:58:40 AM, Jérôme Lanteri (zfs-discuss at list.zfsonlinux.org(mailto:zfs-discuss at list.zfsonlinux.org)) wrote:

> I test zfs on external hard drive.
> creation worked fine
> read/write ok
> import on an other computer ok
> indications about this event connection ok
> but...
> sometimes, if the disk is hard unconnected (usb cable move or
> un-identified disconnection), then it's looks like the hard drive is
> connected, but:
> 1: from file browser (GUI), stay on the directory like nothing happen
> 2: zpool status freeze
> 3: zpool export freeze
> 4: zpool clear freeze
> etc... (all command call zpool/zfs freeze)
> (lsblk -f doesn't show he device at this time)
> after see again the device (lsblk -f), command stay blocked, and other
> freeze same.
> access on other mounted disks zfs formated stay "on".
> questions:
> 1: how to stop command freezing ?

Ensure your storage is stable and not being disconnected without first exporting the pool

> 2: do i need to conclude that ZFS is definitly not for usb connected
> storage devices ?

It is fine on USB devices, but it expects stable storage. While the pool is imported on that machine, you should take care that you don’t accidentally remove the USB cable.



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