August 4, 201114 yr I've been running Unraid 4.7 with mysql on my first server for about 2 weeks (1 week with mysql installed). Server has 2 x data disks (no parity disk yet). I have been using the powerdown script to shut down the server (which has been working perfectly). However today I needed to stop the array to make some changes .When I click stop in the control panel, disk 2 will unmount, but disk 1 will hang on unmounting and the server locks up. I have to run the powerdown script from the command line and shut the server down. I did some searching and discovered that something is obviously running on disk 1 and preventing it from unmounting. I found some instructions to identify the offending process: /usr/bin/fuser -mv /mnt/disk* /mnt/user/* The result: USER PID ACCESS COMMAND /mnt/disk1: root 1844 F.c.. mysqld So ...Mysql is stopping disk 1 from being unmounted. So I found this to stop mysql running: killall mysqld I ran it and it then I re-ran: /usr/bin/fuser -mv /mnt/disk* /mnt/user/* and it simply returned me to the prompt, so I assumed this meant nothing was running. I went to the control panel and clicked stop, this time expecting the array to stop, but again it hung on unmounting disk 1, exactly as before. So now I do not know how to proceed. Here is the tail end of the log file where it hung: Aug 4 06:37:12 NAS status[2698]: State: STARTED Aug 4 06:37:12 NAS status[2698]: D# Model / Serial Status Device Aug 4 06:37:12 NAS status[2698]: 0 rdevModel.0 / rdevSerial.0 DISK_DSBL_NP rdevName. Aug 4 06:37:12 NAS status[2698]: 1 WDC WD20EARS-00 / WD-WCAZA3646980 DISK_OK sda Aug 4 06:37:12 NAS status[2698]: 2 WDC WD10EADS-11 / WD-WCAV53474284 DISK_OK sdb Aug 4 06:37:12 NAS status[2698]: SMART overall health assessment Aug 4 06:37:12 NAS status[2698]: /dev/sda: smartctl 5.39.1 2010-01-28 r3054 [i486-slackware-linux-gnu] (local build) Aug 4 06:37:12 NAS status[2698]: Copyright (C) 2002-10 by Bruce Allen, http://smartmontools.sourceforge.net Aug 4 06:37:12 NAS status[2698]: SMART overall-health self-assessment test result: PASSED Aug 4 06:37:12 NAS status[2698]: /dev/sdb: smartctl 5.39.1 2010-01-28 r3054 [i486-slackware-linux-gnu] (local build) Aug 4 06:37:12 NAS status[2698]: Copyright (C) 2002-10 by Bruce Allen, http://smartmontools.sourceforge.net Aug 4 06:37:12 NAS status[2698]: SMART overall-health self-assessment test result: PASSED Aug 4 06:37:12 NAS status[2698]: /dev/sdc: smartctl 5.39.1 2010-01-28 r3054 [i486-slackware-linux-gnu] (local build) Aug 4 06:37:12 NAS status[2698]: Copyright (C) 2002-10 by Bruce Allen, http://smartmontools.sourceforge.net Aug 4 06:37:12 NAS status[2698]: /dev/sdc: Unknown USB bridge [0x0718:0x0533 (0x100)] Aug 4 06:37:12 NAS status[2698]: Smartctl: please specify device type with the -d option. Aug 4 06:37:12 NAS status[2698]: Use smartctl -h to get a usage summary Aug 4 06:37:13 NAS status[2698]: No active PIDS on the array Aug 4 06:37:14 NAS rc.unRAID[2723]: Killing active pids on the array drives Aug 4 06:37:14 NAS rc.unRAID[2733]: Umounting the drives Aug 4 06:37:14 NAS rc.unRAID[2737]: umount: /mnt/disk1: device is busy Aug 4 06:37:14 NAS rc.unRAID[2737]: umount: /mnt/disk1: device is busy Aug 4 06:37:14 NAS rc.unRAID[2739]: Stopping the Array Aug 4 06:37:14 NAS kernel: mdcmd (13): stop Aug 4 06:37:14 NAS kernel: md: 2 devices still in use. Aug 4 06:37:15 NAS emhttp: shcmd (36): umount /mnt/disk1 >/dev/null 2>&1 Aug 4 06:37:15 NAS emhttp: _shcmd: shcmd (36): exit status: 1 Aug 4 06:37:15 NAS emhttp: shcmd (37): rmdir /mnt/disk1 >/dev/null 2>&1 Aug 4 06:37:15 NAS emhttp: _shcmd: shcmd (37): exit status: 1 Aug 4 06:37:15 NAS emhttp: Retry unmounting disk share(s)... Can someone give me a hand with where to go from here. Thanks
August 4, 201114 yr Author Fixed it myself. It turned out to be the swapfile that I had forgotten I had setup that was still active and stopping the drive from unmounting. Unmenu > User Scripts > Disable Swapfile, and the disk could unmount normally.
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