August 5, 20178 yr Two issues: 1) lots of errors like these during the clearing of 2 disks, despite them the clear seems successful: Aug 5 18:45:01 Tower1 kernel: Buffer I/O error on dev md6, logical block 732566608, async page read Aug 5 18:46:01 Tower1 kernel: Buffer I/O error on dev md5, logical block 732566608, async page read Aug 5 18:46:01 Tower1 kernel: Buffer I/O error on dev md6, logical block 732566608, async page read Aug 5 18:47:01 Tower1 kernel: Buffer I/O error on dev md5, logical block 732566608, async page read Aug 5 18:47:01 Tower1 kernel: Buffer I/O error on dev md6, logical block 732566608, async page read Aug 5 18:47:12 Tower1 kernel: mdcmd (44): spindown 4 Aug 5 18:47:43 Tower1 kernel: mdcmd (45): spindown 2 Aug 5 18:48:01 Tower1 kernel: Buffer I/O error on dev md5, logical block 732566608, async page read Aug 5 18:48:01 Tower1 kernel: Buffer I/O error on dev md6, logical block 732566608, async page read Aug 5 18:49:01 Tower1 kernel: Buffer I/O error on dev md5, logical block 732566608, async page read Aug 5 18:49:01 Tower1 kernel: Buffer I/O error on dev md6, logical block 732566608, async page read Aug 5 18:50:01 Tower1 kernel: Buffer I/O error on dev md5, logical block 732566608, async page read Aug 5 18:50:01 Tower1 kernel: Buffer I/O error on dev md6, logical block 732566608, async page read Aug 5 18:50:57 Tower1 kernel: mdcmd (46): spindown 3 2) after the clearing finished disks don't format, trying to format /dev/ ?? Aug 5 20:17:57 Tower1 emhttpd: shcmd (218): mkfs.btrfs -f -K -dsingle -msingle /dev/ Aug 5 20:17:57 Tower1 root: ERROR: '/dev/' is too small to make a usable filesystem Aug 5 20:17:57 Tower1 root: ERROR: minimum size for each btrfs device is 41943040 Aug 5 20:17:57 Tower1 root: btrfs-progs v4.10.2 Aug 5 20:17:57 Tower1 root: See http://btrfs.wiki.kernel.org for more information. Aug 5 20:17:57 Tower1 root: Aug 5 20:17:57 Tower1 emhttpd: shcmd (218): exit status: 1 Aug 5 20:17:57 Tower1 emhttpd: shcmd (219): mkdir -p /mnt/disk5 Aug 5 20:17:57 Tower1 emhttpd: shcmd (220): mount -t btrfs,xfs,reiserfs -o noatime,nodiratime /dev/ /mnt/disk5 Aug 5 20:17:57 Tower1 kernel: SGI XFS with ACLs, security attributes, no debug enabled Aug 5 20:17:57 Tower1 root: mount: /mnt/disk5: /dev is not a block device. Aug 5 20:17:57 Tower1 emhttpd: shcmd (220): exit status: 32 Aug 5 20:17:57 Tower1 emhttpd: mount error: No file system (32) Aug 5 20:17:57 Tower1 emhttpd: shcmd (221): umount /mnt/disk5 Aug 5 20:17:57 Tower1 root: umount: /mnt/disk5: not mounted. Aug 5 20:17:57 Tower1 emhttpd: shcmd (221): exit status: 32 Aug 5 20:17:57 Tower1 emhttpd: shcmd (222): rmdir /mnt/disk5 Aug 5 20:17:57 Tower1 emhttpd: shcmd (223): mkfs.btrfs -f -K -dsingle -msingle /dev/ Aug 5 20:17:57 Tower1 root: ERROR: '/dev/' is too small to make a usable filesystem Aug 5 20:17:57 Tower1 root: ERROR: minimum size for each btrfs device is 41943040 Aug 5 20:17:57 Tower1 root: btrfs-progs v4.10.2 Aug 5 20:17:57 Tower1 root: See http://btrfs.wiki.kernel.org for more information. Aug 5 20:17:57 Tower1 root: Aug 5 20:17:57 Tower1 emhttpd: shcmd (223): exit status: 1 Aug 5 20:17:57 Tower1 emhttpd: shcmd (224): mkdir -p /mnt/disk6 Aug 5 20:17:57 Tower1 emhttpd: shcmd (225): mount -t btrfs,xfs,reiserfs -o noatime,nodiratime /dev/ /mnt/disk6 Aug 5 20:17:57 Tower1 root: mount: /mnt/disk6: /dev is not a block device. Aug 5 20:17:57 Tower1 emhttpd: shcmd (225): exit status: 32 Aug 5 20:17:57 Tower1 emhttpd: mount error: No file system (32) Aug 5 20:17:57 Tower1 emhttpd: shcmd (226): umount /mnt/disk6 Aug 5 20:17:57 Tower1 root: umount: /mnt/disk6: not mounted. Aug 5 20:17:57 Tower1 emhttpd: shcmd (226): exit status: 32 Aug 5 20:17:57 Tower1 emhttpd: shcmd (227): rmdir /mnt/disk6 I'm guessing that stopping and re-starting the array will fix this but can't for now as I have a busy VM. Full diags attached. Edit: Like I suspected stopping and re-starting the array allowed me to format both disks. tower1-diagnostics-20170805-2020.zip Edited August 6, 20178 yr by johnnie.black
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