This is current/i386 on an ALIX.1E (demsg below). I have an USB disk connected for /backup.
Upon every reboot, the filesystem on that disk is dirty: WARNING: R/W mount of /backup denied. Filesystem is not clean - run fsck It seems that it does not get properly umounted when shutting down. I added 'umount /backup' to my rc.shutdown and that works around it. However, what could be causing this? Jan OpenBSD 6.0-current (GENERIC) #2062: Sun Sep 18 23:12:44 MDT 2016 dera...@i386.openbsd.org:/usr/src/sys/arch/i386/compile/GENERIC cpu0: Geode(TM) Integrated Processor by AMD PCS ("AuthenticAMD" 586-class) 499 MHz cpu0: FPU,DE,PSE,TSC,MSR,CX8,SEP,PGE,CMOV,CFLUSH,MMX,MMXX,3DNOW2,3DNOW real mem = 259207168 (247MB) avail mem = 241659904 (230MB) mpath0 at root scsibus0 at mpath0: 256 targets mainbus0 at root bios0 at mainbus0: date 07/19/10, BIOS32 rev. 0 @ 0xfa950 apm0 at bios0: Power Management spec V1.2 (slowidle) pcibios0 at bios0: rev 2.1 @ 0xf0000/0xdfb4 pcibios0: PCI IRQ Routing Table rev 1.0 @ 0xfdf30/128 (6 entries) pcibios0: PCI Exclusive IRQs: 5 10 11 pcibios0: no compatible PCI ICU found: ICU vendor 0x1022 product 0x2090 pcibios0: Warning, unable to fix up PCI interrupt routing pcibios0: PCI bus #0 is the last bus bios0: ROM list: 0xc0000/0x8000 0xc8000/0xa800 0xef000/0x1000! cpu0 at mainbus0: (uniprocessor) mtrr: K6-family MTRR support (2 registers) amdmsr0 at mainbus0 pci0 at mainbus0 bus 0: configuration mode 1 (bios) pchb0 at pci0 dev 1 function 0 "AMD Geode LX" rev 0x33 vga1 at pci0 dev 1 function 1 "AMD Geode LX Video" rev 0x00 wsdisplay0 at vga1 mux 1: console (80x25, vt100 emulation) wsdisplay0: screen 1-5 added (80x25, vt100 emulation) glxsb0 at pci0 dev 1 function 2 "AMD Geode LX Crypto" rev 0x00: RNG AES vr0 at pci0 dev 13 function 0 "VIA VT6105M RhineIII" rev 0x96: irq 11, address 00:0d:b9:0e:9e:f4 ukphy0 at vr0 phy 1: Generic IEEE 802.3u media interface, rev. 3: OUI 0x004063, model 0x0034 glxpcib0 at pci0 dev 15 function 0 "AMD CS5536 ISA" rev 0x03: rev 3, 32-bit 3579545Hz timer, watchdog, gpio, i2c gpio0 at glxpcib0: 32 pins iic0 at glxpcib0 pciide0 at pci0 dev 15 function 2 "AMD CS5536 IDE" rev 0x01: DMA, channel 0 wired to compatibility, channel 1 wired to compatibility wd0 at pciide0 channel 0 drive 0: <SanDisk SDCFHSNJC-016G> wd0: 1-sector PIO, LBA48, 15259MB, 31250432 sectors wd0(pciide0:0:0): using PIO mode 4, Ultra-DMA mode 2 pciide0: channel 1 ignored (disabled) auglx0 at pci0 dev 15 function 3 "AMD CS5536 Audio" rev 0x01: irq 11, CS5536 AC97 ac97: codec id 0x414c4770 (Avance Logic ALC203 rev 0) ac97: codec features headphone, 20 bit DAC, 18 bit ADC, No 3D Stereo audio0 at auglx0 ohci0 at pci0 dev 15 function 4 "AMD CS5536 USB" rev 0x02: irq 5, version 1.0, legacy support ehci0 at pci0 dev 15 function 5 "AMD CS5536 USB" rev 0x02: irq 5 usb0 at ehci0: USB revision 2.0 uhub0 at usb0 configuration 1 interface 0 "AMD EHCI root hub" rev 2.00/1.00 addr 1 isa0 at glxpcib0 isadma0 at isa0 com0 at isa0 port 0x3f8/8 irq 4: ns16550a, 16 byte fifo com1 at isa0 port 0x2f8/8 irq 3: ns16550a, 16 byte fifo pckbc0 at isa0 port 0x60/5 irq 1 irq 12 pckbd0 at pckbc0 (kbd slot) wskbd0 at pckbd0: console keyboard, using wsdisplay0 pcppi0 at isa0 port 0x61 spkr0 at pcppi0 lpt0 at isa0 port 0x378/4 irq 7 wbsio0 at isa0 port 0x2e/2: W83627HF rev 0x41 lm1 at wbsio0 port 0x290/8: W83627HF npx0 at isa0 port 0xf0/16: reported by CPUID; using exception 16 usb1 at ohci0: USB revision 1.0 uhub1 at usb1 configuration 1 interface 0 "AMD OHCI root hub" rev 1.00/1.00 addr 1 umass0 at uhub0 port 4 configuration 1 interface 0 "Prolific Technology Inc. Mass Storage Device" rev 2.00/1.00 addr 2 umass0: using SCSI over Bulk-Only scsibus1 at umass0: 2 targets, initiator 0 sd0 at scsibus1 targ 1 lun 0: <ST980815, A, 3.AL> SCSI0 0/direct fixed serial.067b2506000000000000 sd0: 76319MB, 512 bytes/sector, 156301488 sectors vscsi0 at root scsibus2 at vscsi0: 256 targets softraid0 at root scsibus3 at softraid0: 256 targets root on wd0a (5162f658323b2b07.a) swap on wd0b dump on wd0b WARNING: R/W mount of /backup denied. Filesystem is not clean - run fsck