Date: Mon, 7 May 2012 14:26:46 GMT From: Jeff Kletsky <freebsd@wagsky.com> To: freebsd-gnats-submit@FreeBSD.org Subject: kern/167685: ZFS on USB drive prevents shutdown / reboot Message-ID: <201205071426.q47EQkDJ037324@red.freebsd.org> Resent-Message-ID: <201205071430.q47EUBW5066309@freefall.freebsd.org>
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>Number: 167685 >Category: kern >Synopsis: ZFS on USB drive prevents shutdown / reboot >Confidential: no >Severity: critical >Priority: high >Responsible: freebsd-bugs >State: open >Quarter: >Keywords: >Date-Required: >Class: sw-bug >Submitter-Id: current-users >Arrival-Date: Mon May 07 14:30:11 UTC 2012 >Closed-Date: >Last-Modified: >Originator: Jeff Kletsky >Release: 9.0-STABLE >Organization: >Environment: $ uname -a FreeBSD usb.wagsky.com 9.0-STABLE FreeBSD 9.0-STABLE #0: Mon May 7 00:17:49 PDT 2012 jeff@usb.wagsky.com:/usr/obj/usr/src/sys/GENERIC amd64 >Description: Installing 9.0-RELEASE on a UFS filesystem then creating a ZFS filesystem on a USB drive causes no evident problems. However, after upgrading to 9.0-STABLE the machine will not shutdown or reboot, getting "stuck" apparently trying to shut down the USB controller. IMPACT -- Cannot reboot or shutdown machine without physical access to manually reset or power-down Can be replicated on a "stock" install and with a memory card (spare 2GB SD used) in a reader (Elago used) in the USB port (Intel Atom 330 CPU and ICH7 chipset). Nothing has been added to the ZFS filesystem, just creating it using zpool is sufficient. Also reported as far back as February 11th, 2012 at http://forums.freebsd.org/showthread.php?t=29700 on different hardware and with ZFS root. Note that this does *not* require ZFS root, only that there be a ZFS filesystem on USB. I have seen this on three machines here, including both with i686 and amd64 architectures. >How-To-Repeat: Fresh install of 9.0-RELEASE off FreeBSD-9.0-RELEASE-amd64-memstick.img Set hostname Decline custom keyboard map Select default distributions + src * games * lib32 * ports * src Guided partitioning tool, accept defaults offerred Observe base,txz, kernel.txz, games.txz, lib32.txz, ports.txz, src.txz install Set root password Configure IPv4 static for Class C private network and its gateway Configure resolv.conf to point at DNS on local network Timezone; CMOS set to UTC, PDT zone selected Services, only default sshd Enable crash dumps Add user 'jeff' Apply configuration and exit Decline making manual changes Reboot First boot: Add jeff to wheel ssh in and... 2 GB SD card in USB reader appears as /dev/da0 # dd if=/dev/zero of=/dev/da0 bs=64k * stick in and zeroed -- reboots fine * zfs_enable="YES" -- reboots fine # zpool create stick /dev/da0 # reboot now Reboots fine # uname -a FreeBSD usb.wagsky.com 9.0-RELEASE FreeBSD 9.0-RELEASE #0: Tue Jan 3 07:46:30 UTC 2012 root@farrell.cse.buffalo.edu:/usr/obj/usr/src/sys/GENERIC amd64 ##### ##### Confirmed -- OK on "stock" 9.0-RELEASE ##### Copy /boot/kernel to /boot/GENERIC-RELEASE Make world using distributed sources (2012-05-06-1325) Make GENERIC kernel using distributed sources (2012-05-06-1833) Install as per http://www.freebsd.org/doc/en_US.ISO8859-1/books/handbook/makeworld.html 25.7.1 The Canonical Way to Update Your System Reboot to single -- OK Only thing that was reported as different in mergemaster was MOTD, left original Reboot to live (no ZFS mounted) FreeBSD usb.wagsky.com 9.0-RELEASE FreeBSD 9.0-RELEASE #0: Sun May 6 18:58:31 PDT 2012 jeff@usb.wagsky.com:/usr/obj/usr/src/sys/GENERIC amd64 Reboot after boot -- OK ##### ##### Confirmed -- OK on "home-built" 9.0-RELEASE ##### pkg_add -r cvsup-without-gui cvsup -h cvsup7.freebsd.org /usr/share/examples/cvsup/stable-supfile run it again, just to make sure no missed commits -- Sun May 6 19:58:37 PDT 2012 buildworld, buildkernel, installkernel (GENERIC) ##### ##### FAILS -- with just new kernel ##### (kernel alone tested as there have been many changes in /etc/rc.d/ and I wanted to see if it could be replicated without the changes) installworld, mergemaster ##### ##### FAILS -- with completed upgrade ##### Log output of shutdown/boot cycle (note that reset button or power switch is required to complete shutdown/reboot process) May 7 07:10:23 usb reboot: rebooted by jeff May 7 07:10:23 usb syslogd: exiting on signal 15 May 7 07:11:36 usb syslogd: kernel boot file is /boot/kernel/kernel May 7 07:11:36 usb kernel: Waiting (max 60 seconds) for system process `vnlru' to stop...done May 7 07:11:36 usb kernel: Waiting (max 60 seconds) for system process `bufdaemon' to stop...done May 7 07:11:36 usb kernel: Waiting (max 60 seconds) for system process `syncer' to stop... May 7 07:11:36 usb kernel: Syncing disks, vnodes remaining...1 1 0 done May 7 07:11:36 usb kernel: All buffers synced. May 7 07:11:36 usb kernel: Uptime: 2m23s May 7 07:11:36 usb kernel: usbus0: Controller shutdown May 7 07:11:36 usb kernel: uhub0: at usbus0, port 1, addr 1 (disconnected) May 7 07:11:36 usb kernel: usbus0: Controller shutdown complete May 7 07:11:36 usb kernel: usbus1: Controller shutdown May 7 07:11:36 usb kernel: uhub1: at usbus1, port 1, addr 1 (disconnected) May 7 07:11:36 usb kernel: usbus1: Controller shutdown complete May 7 07:11:36 usb kernel: usbus2: Controller shutdown May 7 07:11:36 usb kernel: uhub2: at usbus2, port 1, addr 1 (disconnected) May 7 07:11:36 usb kernel: usbus2: Controller shutdown complete May 7 07:11:36 usb kernel: usbus3: Controller shutdown May 7 07:11:36 usb kernel: uhub3: at usbus3, port 1, addr 1 (disconnected) May 7 07:11:36 usb kernel: usbus3: Controller shutdown complete May 7 07:11:36 usb kernel: usbus4: Controller shutdown ##### ##### -- Manual use of reset or power switch required here to complete ##### May 7 07:11:36 usb kernel: Copyright (c) 1992-2012 The FreeBSD Project. May 7 07:11:36 usb kernel: Copyright (c) 1979, 1980, 1983, 1986, 1988, 1989, 1991, 1992, 1993, 1994 May 7 07:11:36 usb kernel: The Regents of the University of California. All rights reserved. May 7 07:11:36 usb kernel: FreeBSD is a registered trademark of The FreeBSD Foundation. May 7 07:11:36 usb kernel: FreeBSD 9.0-STABLE #0: Mon May 7 00:17:49 PDT 2012 May 7 07:11:36 usb kernel: jeff@usb.wagsky.com:/usr/obj/usr/src/sys/GENERIC amd64 May 7 07:11:36 usb kernel: CPU: Intel(R) Atom(TM) CPU 330 @ 1.60GHz (1600.03-MHz K8-class CPU) May 7 07:11:36 usb kernel: Origin = "GenuineIntel" Id = 0x106c2 Family = 6 Model = 1c Stepping = 2 May 7 07:11:36 usb kernel: Features=0xbfe9fbff<FPU,VME,DE,PSE,TSC,MSR,PAE,MCE,CX8,APIC,SEP,MTRR,PGE,MCA,CMOV,PAT,CLFLUSH,DTS,ACPI,MMX,FXSR,SSE,SSE2,SS,HTT,TM,PBE> May 7 07:11:36 usb kernel: Features2=0x40e31d<SSE3,DTES64,MON,DS_CPL,TM2,SSSE3,CX16,xTPR,PDCM,MOVBE> May 7 07:11:36 usb kernel: AMD Features=0x20100800<SYSCALL,NX,LM> May 7 07:11:36 usb kernel: AMD Features2=0x1<LAHF> May 7 07:11:36 usb kernel: TSC: P-state invariant, performance statistics May 7 07:11:36 usb kernel: real memory = 2147483648 (2048 MB) May 7 07:11:36 usb kernel: avail memory = 2037760000 (1943 MB) May 7 07:11:36 usb kernel: Event timer "LAPIC" quality 400 May 7 07:11:36 usb kernel: ACPI APIC Table: <A_M_I_ OEMAPIC > May 7 07:11:36 usb kernel: FreeBSD/SMP: Multiprocessor System Detected: 4 CPUs May 7 07:11:36 usb kernel: FreeBSD/SMP: 1 package(s) x 2 core(s) x 2 HTT threads May 7 07:11:36 usb kernel: cpu0 (BSP): APIC ID: 0 May 7 07:11:36 usb kernel: cpu1 (AP/HT): APIC ID: 1 May 7 07:11:36 usb kernel: cpu2 (AP): APIC ID: 2 May 7 07:11:36 usb kernel: cpu3 (AP/HT): APIC ID: 3 May 7 07:11:36 usb kernel: ioapic0: Changing APIC ID to 4 May 7 07:11:36 usb kernel: ioapic0 <Version 2.0> irqs 0-23 on motherboard May 7 07:11:36 usb kernel: kbd1 at kbdmux0 May 7 07:11:36 usb kernel: ctl: CAM Target Layer loaded May 7 07:11:36 usb kernel: acpi0: <A_M_I_ OEMXSDT> on motherboard May 7 07:11:36 usb kernel: acpi0: Power Button (fixed) May 7 07:11:36 usb kernel: acpi0: reservation of 0, a0000 (3) failed May 7 07:11:36 usb kernel: acpi0: reservation of 100000, 7f700000 (3) failed May 7 07:11:36 usb kernel: cpu0: <ACPI CPU> on acpi0 May 7 07:11:36 usb kernel: cpu1: <ACPI CPU> on acpi0 May 7 07:11:36 usb kernel: cpu2: <ACPI CPU> on acpi0 May 7 07:11:36 usb kernel: cpu3: <ACPI CPU> on acpi0 May 7 07:11:36 usb kernel: attimer0: <AT timer> port 0x40-0x43 irq 0 on acpi0 May 7 07:11:36 usb kernel: Timecounter "i8254" frequency 1193182 Hz quality 0 May 7 07:11:36 usb kernel: Event timer "i8254" frequency 1193182 Hz quality 100 May 7 07:11:36 usb kernel: atrtc0: <AT realtime clock> port 0x70-0x71 irq 8 on acpi0 May 7 07:11:36 usb kernel: Event timer "RTC" frequency 32768 Hz quality 0 May 7 07:11:36 usb kernel: hpet0: <High Precision Event Timer> iomem 0xfed00000-0xfed003ff on acpi0 May 7 07:11:36 usb kernel: Timecounter "HPET" frequency 14318180 Hz quality 950 May 7 07:11:36 usb kernel: Event timer "HPET" frequency 14318180 Hz quality 450 May 7 07:11:36 usb kernel: Event timer "HPET1" frequency 14318180 Hz quality 440 May 7 07:11:36 usb kernel: Event timer "HPET2" frequency 14318180 Hz quality 440 May 7 07:11:36 usb kernel: Timecounter "ACPI-fast" frequency 3579545 Hz quality 900 May 7 07:11:36 usb kernel: acpi_timer0: <24-bit timer at 3.579545MHz> port 0x808-0x80b on acpi0 May 7 07:11:36 usb kernel: pcib0: <ACPI Host-PCI bridge> port 0xcf8-0xcff on acpi0 May 7 07:11:36 usb kernel: pci0: <ACPI PCI bus> on pcib0 May 7 07:11:36 usb kernel: vgapci0: <VGA-compatible display> port 0xb800-0xb807 mem 0xefd00000-0xefd7ffff,0xd0000000-0xdfffffff,0xefd80000-0xefdbffff irq 16 at device 2.0 on pci0 May 7 07:11:36 usb kernel: agp0: <Intel 82945G (945G GMCH) SVGA controller> on vgapci0 May 7 07:11:36 usb kernel: agp0: aperture size is 256M, detected 7932k stolen memory May 7 07:11:36 usb kernel: hdac0: <Intel 82801G HDA Controller> mem 0xefdf8000-0xefdfbfff irq 19 at device 27.0 on pci0 May 7 07:11:36 usb kernel: pcib1: <ACPI PCI-PCI bridge> irq 16 at device 28.0 on pci0 May 7 07:11:36 usb kernel: pci3: <ACPI PCI bus> on pcib1 May 7 07:11:36 usb kernel: pcib2: <ACPI PCI-PCI bridge> irq 17 at device 28.1 on pci0 May 7 07:11:36 usb kernel: pci2: <ACPI PCI bus> on pcib2 May 7 07:11:36 usb kernel: re0: <RealTek 8168/8111 B/C/CP/D/DP/E/F PCIe Gigabit Ethernet> port 0xe800-0xe8ff mem 0xeffff000-0xefffffff irq 17 at device 0.0 on pci2 May 7 07:11:36 usb kernel: re0: Using 1 MSI message May 7 07:11:36 usb kernel: re0: Chip rev. 0x38000000 May 7 07:11:36 usb kernel: re0: MAC rev. 0x00000000 May 7 07:11:36 usb kernel: miibus0: <MII bus> on re0 May 7 07:11:36 usb kernel: rgephy0: <RTL8169S/8110S/8211 1000BASE-T media interface> PHY 1 on miibus0 May 7 07:11:36 usb kernel: rgephy0: none, 10baseT, 10baseT-FDX, 10baseT-FDX-flow, 100baseTX, 100baseTX-FDX, 100baseTX-FDX-flow, 1000baseT, 1000baseT-master, 1000baseT-FDX, 1000baseT-FDX-master, 1000baseT-FDX-flow, 1000baseT-FDX-flow-master, auto, auto-flow May 7 07:11:36 usb kernel: re0: Ethernet address: 00:26:18:bc:9e:44 May 7 07:11:36 usb kernel: uhci0: <Intel 82801G (ICH7) USB controller USB-A> port 0xb880-0xb89f irq 20 at device 29.0 on pci0 May 7 07:11:36 usb kernel: uhci0: LegSup = 0x2f00 May 7 07:11:36 usb kernel: usbus0 on uhci0 May 7 07:11:36 usb kernel: uhci1: <Intel 82801G (ICH7) USB controller USB-B> port 0xbc00-0xbc1f irq 17 at device 29.1 on pci0 May 7 07:11:36 usb kernel: uhci1: LegSup = 0x2f00 May 7 07:11:36 usb kernel: usbus1 on uhci1 May 7 07:11:36 usb kernel: uhci2: <Intel 82801G (ICH7) USB controller USB-C> port 0xc000-0xc01f irq 18 at device 29.2 on pci0 May 7 07:11:36 usb kernel: uhci2: LegSup = 0x2f00 May 7 07:11:36 usb kernel: usbus2 on uhci2 May 7 07:11:36 usb kernel: uhci3: <Intel 82801G (ICH7) USB controller USB-D> port 0xc080-0xc09f irq 19 at device 29.3 on pci0 May 7 07:11:36 usb kernel: uhci3: LegSup = 0x2f00 May 7 07:11:36 usb kernel: usbus3 on uhci3 May 7 07:11:36 usb kernel: ehci0: <Intel 82801GB/R (ICH7) USB 2.0 controller> mem 0xefdffc00-0xefdfffff irq 20 at device 29.7 on pci0 May 7 07:11:36 usb kernel: usbus4: EHCI version 1.0 May 7 07:11:36 usb kernel: usbus4 on ehci0 May 7 07:11:36 usb kernel: pcib3: <ACPI PCI-PCI bridge> at device 30.0 on pci0 May 7 07:11:36 usb kernel: pci1: <ACPI PCI bus> on pcib3 May 7 07:11:36 usb kernel: em0: <Intel(R) PRO/1000 Legacy Network Connection 1.0.3> port 0xdc00-0xdc3f mem 0xefee0000-0xefefffff,0xefec0000-0xefedffff irq 17 at device 0.0 on pci1 May 7 07:11:36 usb kernel: em0: Ethernet address: 00:1b:21:1d:f4:ec May 7 07:11:36 usb kernel: isab0: <PCI-ISA bridge> at device 31.0 on pci0 May 7 07:11:36 usb kernel: isa0: <ISA bus> on isab0 May 7 07:11:36 usb kernel: atapci0: <Intel ICH7 UDMA100 controller> port 0x1f0-0x1f7,0x3f6,0x170-0x177,0x376,0xffa0-0xffaf at device 31.1 on pci0 May 7 07:11:36 usb kernel: ata0: <ATA channel> at channel 0 on atapci0 May 7 07:11:36 usb kernel: atapci1: <Intel ICH7 SATA300 controller> port 0xcc00-0xcc07,0xc880-0xc883,0xc800-0xc807,0xc480-0xc483,0xc400-0xc40f irq 23 at device 31.2 on pci0 May 7 07:11:36 usb kernel: ata2: <ATA channel> at channel 0 on atapci1 May 7 07:11:36 usb kernel: ata3: <ATA channel> at channel 1 on atapci1 May 7 07:11:36 usb kernel: pci0: <serial bus, SMBus> at device 31.3 (no driver attached) May 7 07:11:36 usb kernel: acpi_button0: <Power Button> on acpi0 May 7 07:11:36 usb kernel: atkbdc0: <Keyboard controller (i8042)> port 0x60,0x64 irq 1 on acpi0 May 7 07:11:36 usb kernel: atkbd0: <AT Keyboard> irq 1 on atkbdc0 May 7 07:11:36 usb kernel: kbd0 at atkbd0 May 7 07:11:36 usb kernel: atkbd0: [GIANT-LOCKED] May 7 07:11:36 usb kernel: psm0: <PS/2 Mouse> irq 12 on atkbdc0 May 7 07:11:36 usb kernel: psm0: [GIANT-LOCKED] May 7 07:11:36 usb kernel: psm0: model IntelliMouse Explorer, device ID 4 May 7 07:11:36 usb kernel: uart0: <16550 or compatible> port 0x3f8-0x3ff irq 4 flags 0x10 on acpi0 May 7 07:11:36 usb kernel: ppc0: <Parallel port> port 0x378-0x37f irq 7 on acpi0 May 7 07:11:36 usb kernel: ppc0: Generic chipset (NIBBLE-only) in COMPATIBLE mode May 7 07:11:36 usb kernel: ppbus0: <Parallel port bus> on ppc0 May 7 07:11:36 usb kernel: lpt0: <Printer> on ppbus0 May 7 07:11:36 usb kernel: lpt0: Interrupt-driven port May 7 07:11:36 usb kernel: ppi0: <Parallel I/O> on ppbus0 May 7 07:11:36 usb kernel: plip0: <PLIP network interface> on ppbus0 May 7 07:11:36 usb kernel: orm0: <ISA Option ROM> at iomem 0xcb000-0xcbfff on isa0 May 7 07:11:36 usb kernel: sc0: <System console> at flags 0x100 on isa0 May 7 07:11:36 usb kernel: sc0: VGA <16 virtual consoles, flags=0x300> May 7 07:11:36 usb kernel: vga0: <Generic ISA VGA> at port 0x3c0-0x3df iomem 0xa0000-0xbffff on isa0 May 7 07:11:36 usb kernel: p4tcc0: <CPU Frequency Thermal Control> on cpu0 May 7 07:11:36 usb kernel: p4tcc1: <CPU Frequency Thermal Control> on cpu1 May 7 07:11:36 usb kernel: p4tcc2: <CPU Frequency Thermal Control> on cpu2 May 7 07:11:36 usb kernel: p4tcc3: <CPU Frequency Thermal Control> on cpu3 May 7 07:11:36 usb kernel: Timecounters tick every 1.000 msec May 7 07:11:36 usb kernel: hdacc0: <VIA VT1708S_4 HDA CODEC> at cad 0 on hdac0 May 7 07:11:36 usb kernel: hdaa0: <VIA VT1708S_4 HDA CODEC Audio Function Group> at nid 1 on hdacc0 May 7 07:11:36 usb kernel: pcm0: <VIA VT1708S_4 HDA CODEC PCM (Analog 2.0+HP/2.0)> at nid 28,29 and 26,31,30,27 on hdaa0 May 7 07:11:36 usb kernel: usbus0: 12Mbps Full Speed USB v1.0 May 7 07:11:36 usb kernel: usbus1: 12Mbps Full Speed USB v1.0 May 7 07:11:36 usb kernel: usbus2: 12Mbps Full Speed USB v1.0 May 7 07:11:36 usb kernel: usbus3: 12Mbps Full Speed USB v1.0 May 7 07:11:36 usb kernel: usbus4: 480Mbps High Speed USB v2.0 May 7 07:11:36 usb kernel: ugen0.1: <Intel> at usbus0 May 7 07:11:36 usb kernel: uhub0: <Intel UHCI root HUB, class 9/0, rev 1.00/1.00, addr 1> on usbus0 May 7 07:11:36 usb kernel: ugen1.1: <Intel> at usbus1 May 7 07:11:36 usb kernel: uhub1: <Intel UHCI root HUB, class 9/0, rev 1.00/1.00, addr 1> on usbus1 May 7 07:11:36 usb kernel: ugen2.1: <Intel> at usbus2 May 7 07:11:36 usb kernel: uhub2: <Intel UHCI root HUB, class 9/0, rev 1.00/1.00, addr 1> on usbus2 May 7 07:11:36 usb kernel: ugen3.1: <Intel> at usbus3 May 7 07:11:36 usb kernel: uhub3: <Intel UHCI root HUB, class 9/0, rev 1.00/1.00, addr 1> on usbus3 May 7 07:11:36 usb kernel: ugen4.1: <Intel> at usbus4 May 7 07:11:36 usb kernel: uhub4: <Intel EHCI root HUB, class 9/0, rev 2.00/1.00, addr 1> on usbus4 May 7 07:11:36 usb kernel: uhub0: 2 ports with 2 removable, self powered May 7 07:11:36 usb kernel: uhub1: 2 ports with 2 removable, self powered May 7 07:11:36 usb kernel: uhub2: 2 ports with 2 removable, self powered May 7 07:11:36 usb kernel: uhub3: 2 ports with 2 removable, self powered May 7 07:11:36 usb kernel: ada0 at ata2 bus 0 scbus1 target 0 lun 0 May 7 07:11:36 usb kernel: ada0: <M4-CT064M4SSD2 0309> ATA-9 SATA 3.x device May 7 07:11:36 usb kernel: ada0: 150.000MB/s transfers (SATA, UDMA5, PIO 8192bytes) May 7 07:11:36 usb kernel: ada0: 61057MB (125045424 512 byte sectors: 16H 63S/T 16383C) May 7 07:11:36 usb kernel: ada0: Previously was known as ad4 May 7 07:11:36 usb kernel: SMP: AP CPU #2 Launched! May 7 07:11:36 usb kernel: SMP: AP CPU #1 Launched! May 7 07:11:36 usb kernel: SMP: AP CPU #3 Launched! May 7 07:11:36 usb kernel: Root mount waiting for: usbus4 May 7 07:11:36 usb kernel: uhub4: 8 ports with 8 removable, self powered May 7 07:11:36 usb kernel: Root mount waiting for: usbus4 May 7 07:11:36 usb kernel: ugen4.2: <Generic> at usbus4 May 7 07:11:36 usb kernel: umass0: <Generic USB2.0-CRW, class 0/0, rev 2.00/19.81, addr 2> on usbus4 May 7 07:11:36 usb kernel: umass0: SCSI over Bulk-Only; quirks = 0x4000 May 7 07:11:36 usb kernel: umass0:4:0:-1: Attached to scbus4 May 7 07:11:36 usb kernel: Trying to mount root from ufs:/dev/ada0p2 [rw]... May 7 07:11:36 usb kernel: (probe0:umass-sim0:0:0:0): TEST UNIT READY. CDB: 0 0 0 0 0 0 May 7 07:11:36 usb kernel: (probe0:umass-sim0:0:0:0): CAM status: SCSI Status Error May 7 07:11:36 usb kernel: (probe0:umass-sim0:0:0:0): SCSI status: Check Condition May 7 07:11:36 usb kernel: (probe0:umass-sim0:0:0:0): SCSI sense: UNIT ATTENTION asc:28,0 (Not ready to ready change, medium may have changed) May 7 07:11:36 usb kernel: da0 at umass-sim0 bus 0 scbus4 target 0 lun 0 May 7 07:11:36 usb kernel: da0: <Generic- SD/MMC 1.00> Removable Direct Access SCSI-0 device May 7 07:11:36 usb kernel: da0: 40.000MB/s transfers May 7 07:11:36 usb kernel: da0: 1962MB (4019200 512 byte sectors: 255H 63S/T 250C) May 7 07:11:36 usb kernel: ZFS NOTICE: Prefetch is disabled by default if less than 4GB of RAM is present; May 7 07:11:36 usb kernel: to enable, add "vfs.zfs.prefetch_disable=0" to /boot/loader.conf. May 7 07:11:36 usb kernel: ZFS filesystem version 5 May 7 07:11:36 usb kernel: ZFS storage pool version 28 May 7 07:11:37 usb kernel: . >Fix: >Release-Note: >Audit-Trail: >Unformatted:
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