Guys I could really do with some help/advice here or I am losing my job.
Two raidz pools each of 4TB x 4 called master and backup have been attached to a macmini running 10.10 from two USB raid cases and working fine until yesterday.
Master was backed-up to backup each night using Chronosync. Then somebody in the office mistakenly filled backup to the brink with a set of HD videos and it was so full that Chronsync could not backup to it and we could not delete any files. The best thing seemed to be to recreate the raidz pool on it and let tonight's Chronosyc run. Then someone (me—bloody fool) mentioned that maybe we should update it to 10.11 and I went ahead and exported master, switched it off and ran the 10.11 upgrade. It went normally. At the final powering-up, of course master did not mount because of the new SIP in 10.11 so I switched SIP off (Recovery Mod—csrutil disable), ran the latest 1.4.5 zfs installer and rebooted. Then TSHTF—no master mounting. I tried import master and get the message that the disk is busy (the LEDs on the front of the disks are flashing like crazy for sure as if some processing is running); zpool status shows that all disks 1 through 4 are ONLINE and there are no data errors, and zpool list shows master as having a size of 14.5 TB with 5.85 ALLOC and 6.65TB FREE at 40% capacity, so the raidz disk seems fine and the amount of data is about right (see enclosed screenshot). It seems like the data is still on the raidz and healthy BUT try as I might I cannot get master to mount on the macmini desktop. I have to tread lightly now and not make a stupid misyake because this is now the only disk with all the company data as the backup disk still does not have a copy.
I have read all the Oracle documents on mountpoints and cannot see my way out for the trees.
First, what command can I use to check the existing mountpoint of the now unmounted raid, and second, how can I set a new mountpoint to get master mounted on the desktop again?
Be gentle and clear like talking to a baby, it's been a REALLY long day.
The office it now closed but I do have remote access into screensharing and can work in terminal on the disk or collect other screenshots to post as requested.
I'll buy anyone in Tokyo a few pints for some help here. Lundman do you drink?
Robert