Hello Erik,

Monday, June 16, 2008, 9:45:13 AM, you wrote:

ET> One thing I should mention on this is that I've had  _very_ bad 
ET> experience with using single-LUN ZFS filesystems over FC.

ET> that is, using an external SAN box to create a single LUN, export that
ET> LUN to a FC-connected host, then creating a pool as follows:

ET> zpool create tank <LUN_ID>

ET> It works fine, up until something bad happens to the array, or the FC 
ET> connection (like, say, losing power to the whole system), and the host
ET> computer cannot talk to the LUN.

ET> This will corrupt the zpool permanently, and there is no way to fix the
ET> pool  (and, without some magic in /etc/system , will leave the host in a
ET> permanent kernel panic loop).  This is a known bug, and the fix isn't 
ET> looking to be available anytime soon.

ET> This problem doesn't seem to manifest itself if the zpool has redundant
ET> members, even if they are on the same array (and thus, the host loses 
ET> contact with both LUNs at the same time).

ET> So, for FC or iSCSI targets, I would HIGHLY recommend that ZFS _ALWAYS_
ET> be configured in a redundant setup.


Have you got more details or at least bug ids?
Is it only (I dboubt) fc related?

-- 
Best regards,
 Robert                            mailto:[EMAIL PROTECTED]
                                       http://milek.blogspot.com

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