Date: Wed, 17 Jun 2015 15:24:51 -0400 From: Michael Powell <nightrecon@hotmail.com> To: freebsd-questions@freebsd.org Subject: Re: ZFS passdevgonecb Message-ID: <mlshi7$3of$1@ger.gmane.org> References: <557F90DB.80601@herveybayaustralia.com.au>
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Da Rock wrote: > I hate jumping in like this out of the blue, but time is not on my side > atm with a lot going on. > > I have a problem with some devices disappearing on various versions of > FreeBSD and machines (laptops, workstations/servers). Umass are the > norm, with the message occurring most on usb sticks and sd cards. > > Big problem atm is that my file server has a failed disk in the raid, > and I've tried replacing it with a new drive (twice now), and both times > it begins to resilver and then it is "REMOVED". If I online it again, it > goes for about 10mins then REMOVED again. > > Dmesg shows that the device is removed from the devfs with a > passdevgonecb/lost device message. This apparently occurs right at boot > too, as it shows amongst the usual scrolling during boot. > > I had a chat with someone and they mentioned the cable and/or controller > could be the issue. Could anyone add any insight or tests I could do? > I'm not exactly claim to be an expert at zfs, so maybe something might > need addressing there too. > > I'd particularly appreciate a means of testing the controller. > > ATM the main theory is to replace the board - not a happy thought! :/ > Another item to consider, even if only to exclude it, is: what kind of drives are these? Are they server RAID certified or are they 'consumer' desktop types. RAID certified are designed to time-limit attempts at error recovery. There is a window in time that if a consumer drive takes too long at internal ECC the controller will drop it. Doubt this is your case, I bet you have server drives. I just mention it because using consumer desktop drives on RAID controllers can sometimes be problematic. -Mike
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