Date: Fri, 29 Oct 2010 08:34:36 +0800 From: Lin Ming <ming.m.lin@intel.com> To: Hans Petter Selasky <hselasky@c2i.net>, Andriy Gapon <avg@icyb.net.ua>, Jung-uk Kim <jkim@FreeBSD.org> Cc: freebsd-acpi@freebsd.org, "Moore, Robert" <robert.moore@intel.com> Subject: Re: MacBookPro 5,1 Message-ID: <1288312476.13315.15.camel@minggr.sh.intel.com> In-Reply-To: <201010281810.23668.hselasky@c2i.net> References: <201010121209.06397.hselasky@c2i.net> <1288278300.2459.19.camel@localhost> <1288279472.2459.22.camel@localhost> <201010281810.23668.hselasky@c2i.net>
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On Fri, 2010-10-29 at 00:10 +0800, Hans Petter Selasky wrote:
> On Thursday 28 October 2010 17:24:32 Lin Ming wrote:
> > On Thu, 2010-10-28 at 23:05 +0800, Lin Ming wrote:
> > > On Thu, 2010-10-28 at 22:55 +0800, Hans Petter Selasky wrote:
> > > > On Thursday 28 October 2010 16:44:55 Lin Ming wrote:
> > > > > On Thu, 2010-10-28 at 22:40 +0800, Hans Petter Selasky wrote:
> > > > > > I make two kernel builds, one with the following patch, and one
> > > > > > without.
> > > > >
> > > > > <snip>
> > > > >
> > > > > > Did you get the information you needed? Or do I need to send the
> > > > > > complete dmesg?
> > > > >
> > > > > Yes, please send both dmesgs (with and without the patch)
> > > > >
> > > > > Thanks.
> > > > >
> > > > > > --HPS
> > >
> > > DEBUG: Aml=0xffffff00031f9000, EndAml=0xffffff00031f900d,
> > > AmlSizeNeeded=13 DEBUG: Aml=0xffffff00031f9000, MinimumLength=9,
> > > AmlResourceSource=0xffffff00031f9009 DEBUG: string length=16
> > >
> > > AmlSizeNeeded=13, but string length=16, there is something pretty wrong.
> > >
> > > Thanks for the info.
> > > I'm checking...
> >
> > I find the evil, the resource buffer passed in by driver is wrong.
> >
> > Would you please try below patch?
> > Just apply below patch, no kernel boot acpi options and no other
> > patches.
> >
> > diff --git a/source/components/resources/rscalc.c
> > b/source/components/resources/rscalc.c index 3215c9e..e68b5af 100644
> > --- a/source/components/resources/rscalc.c
> > +++ b/source/components/resources/rscalc.c
> > @@ -203,7 +203,13 @@ AcpiRsStructOptionLength (
> > */
> > if (ResourceSource->StringPtr)
> > {
> > - return ((ACPI_RS_LENGTH) (ResourceSource->StringLength + 1));
> > + if (ACPI_STRLEN (ResourceSource->StringPtr) + 1 !=
> > ResourceSource->StringLength) + {
> > + AcpiOsPrintf("Bug: the passed in resource buffer is wrong,
> > ResourceSource->StringLength=%d, " + "but the real string
> > length is %d\n",
> > + ResourceSource->StringLength, ACPI_STRLEN
> > (ResourceSource->StringPtr) + 1); + }
> > + return ((ACPI_RS_LENGTH) ((ACPI_STRLEN (ResourceSource->StringPtr)
> > + 1) + 1)); }
> >
> > return (0);
> >
> > > Lin Ming
>
> That seems to have done the trick! There are some additional debug prints from
> some other sub-systems which you can ignore.
>
> 1) copied fresh ACPICA sources from kernel tree.
> 2) compiled with your patch.
> 3) Resulting dmesg is attached.
Hi, guys
Hans and I have found the root cause of this bug.
The ResourceSource->StringLength set by up layer driver is wrong, see the patch below.
Below patch fixes the bug and on Hans' machine it prints,
Bug: the passed in resource buffer is wrong, Resource->StringLength=1, but the real string length is 10
Bug: the passed in resource buffer is wrong, Resource->StringLength=1, but the real string length is 10
Bug: the passed in resource buffer is wrong, Resource->StringLength=1, but the real string length is 10
Bug: the passed in resource buffer is wrong, Resource->StringLength=1, but the real string length is 8
Bug: the passed in resource buffer is wrong, Resource->StringLength=1, but the real string length is 10
Bug: the passed in resource buffer is wrong, Resource->StringLength=1, but the real string length is 10
Bug: the passed in resource buffer is wrong, Resource->StringLength=1, but the real string length is 10
Bug: the passed in resource buffer is wrong, Resource->StringLength=1, but the real string length is 10
Bug: the passed in resource buffer is wrong, Resource->StringLength=1, but the real string length is 10
The full dmesg also attached.
Kim,
Could you write a fix in up layer code(seems in acpi_pci_link_route_irqs)?
Thanks.
diff --git a/source/components/resources/rscalc.c b/source/components/resources/rscalc.c
index 3215c9e..e68b5af 100644
--- a/source/components/resources/rscalc.c
+++ b/source/components/resources/rscalc.c
@@ -203,7 +203,13 @@ AcpiRsStructOptionLength (
*/
if (ResourceSource->StringPtr)
{
- return ((ACPI_RS_LENGTH) (ResourceSource->StringLength + 1));
+ if (ACPI_STRLEN (ResourceSource->StringPtr) + 1 != ResourceSource->StringLength)
+ {
+ AcpiOsPrintf("Bug: the passed in resource buffer is wrong, ResourceSource->StringLength=%d, "
+ "but the real string length is %d\n",
+ ResourceSource->StringLength, ACPI_STRLEN (ResourceSource->StringPtr) + 1);
+ }
+ return ((ACPI_RS_LENGTH) ((ACPI_STRLEN (ResourceSource->StringPtr) + 1) + 1));
}
return (0);
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Content-Disposition: attachment; filename="dmesg.freebsd"
Content-Type: text/plain; name="dmesg.freebsd"; charset="UTF-8"
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Copyright (c) 1992-2010 The FreeBSD Project.
Copyright (c) 1979, 1980, 1983, 1986, 1988, 1989, 1991, 1992, 1993, 1994
The Regents of the University of California. All rights reserved.
FreeBSD is a registered trademark of The FreeBSD Foundation.
FreeBSD 9.0-CURRENT #88: Thu Oct 28 18:05:11 CEST 2010
root@hpsbook:/usr/obj/usr/src/sys/GENERIC amd64
WARNING: WITNESS option enabled, expect reduced performance.
MEMGUARD DEBUGGING ALLOCATOR INITIALIZED:
MEMGUARD map base: 0xffffff8000200000
MEMGUARD map limit: 0xffffff8003a99000
MEMGUARD map size: 59346944 (Bytes)
CPU: Intel(R) Core(TM)2 Duo CPU P7550 @ 2.26GHz (2255.39-MHz K8-class CPU)
Origin = "GenuineIntel" Id = 0x1067a Family = 6 Model = 17 Stepping = 10
Features=0xbfebfbff<FPU,VME,DE,PSE,TSC,MSR,PAE,MCE,CX8,APIC,SEP,MTRR,PGE,MCA,CMOV,PAT,PSE36,CLFLUSH,DTS,ACPI,MMX,FXSR,SSE,SSE2,SS,HTT,TM,PBE>
Features2=0x408e3bd<SSE3,DTES64,MON,DS_CPL,VMX,EST,TM2,SSSE3,CX16,xTPR,PDCM,SSE4.1,XSAVE>
AMD Features=0x20100800<SYSCALL,NX,LM>
AMD Features2=0x1<LAHF>
TSC: P-state invariant
real memory = 2147483648 (2048 MB)
avail memory = 1768013824 (1686 MB)
Event timer "LAPIC" frequency 0 Hz quality 500
ACPI APIC Table: <APPLE Apple00>
FreeBSD/SMP: Multiprocessor System Detected: 2 CPUs
FreeBSD/SMP: 1 package(s) x 2 core(s)
cpu0 (BSP): APIC ID: 0
cpu1 (AP): APIC ID: 1
ioapic0: Changing APIC ID to 1
ioapic0 <Version 1.1> irqs 0-23 on motherboard
Cuse4BSD v0.1.13 @ /dev/cuse
kbd0 at kbdmux0
acpi0: <APPLE Apple00> on motherboard
acpi0: [ITHREAD]
acpi_ec0: <Embedded Controller: GPE 0x3f, ECDT> port 0x62,0x66 on acpi0
acpi0: Power Button (fixed)
unknown: I/O range not supported
acpi_hpet0: <High Precision Event Timer> iomem 0xfed00000-0xfed003ff irq 0,8 on acpi0
Timecounter "HPET" frequency 25000000 Hz quality 900
Timecounter "ACPI-safe" frequency 3579545 Hz quality 850
acpi_timer0: <24-bit timer at 3.579545MHz> port 0x408-0x40b on acpi0
cpu0: <ACPI CPU> on acpi0
cpu1: <ACPI CPU> on acpi0
acpi_acad0: <AC Adapter> on acpi0
acpi_lid0: <Control Method Lid Switch> on acpi0
acpi_lid0: enable wake failed
acpi_button0: <Power Button> on acpi0
acpi_button1: <Sleep Button> on acpi0
pcib0: <ACPI Host-PCI bridge> on acpi0
pci0: <ACPI PCI bus> on pcib0
Bug: the passed in resource buffer is wrong, Resource->StringLength=1, but the real string length is 10
Bug: the passed in resource buffer is wrong, Resource->StringLength=1, but the real string length is 10
Bug: the passed in resource buffer is wrong, Resource->StringLength=1, but the real string length is 10
Bug: the passed in resource buffer is wrong, Resource->StringLength=1, but the real string length is 8
Bug: the passed in resource buffer is wrong, Resource->StringLength=1, but the real string length is 10
Bug: the passed in resource buffer is wrong, Resource->StringLength=1, but the real string length is 10
Bug: the passed in resource buffer is wrong, Resource->StringLength=1, but the real string length is 10
Bug: the passed in resource buffer is wrong, Resource->StringLength=1, but the real string length is 10
Bug: the passed in resource buffer is wrong, Resource->StringLength=1, but the real string length is 10
(null) from acpi0(null) from acpi0(null) from acpi0(null) from acpi0(null) from acpi0(null) from acpi0(null) from acpi0(null) from acpi0(null) from acpi0(null) from acpi0(null) from acpi0(null) from acpi0(null) from acpi0(null) from acpi0(null) from acpi0(null) from acpi0(null) from acpi0(null) from acpi0pci0: <memory, RAM> at device 0.1 (no driver attached)
isab0: <PCI-ISA bridge> port 0x2000-0x20ff at device 3.0 on pci0
isa0: <ISA bus> on isab0
pci0: <memory, RAM> at device 3.1 (no driver attached)
pci0: <serial bus, SMBus> at device 3.2 (no driver attached)
pci0: <memory, RAM> at device 3.3 (no driver attached)
pci0: <memory, RAM> at device 3.4 (no driver attached)
pci0: <processor> at device 3.5 (no driver attached)
ohci0: <nVidia nForce MCP79 USB Controller> mem 0x93488000-0x93488fff irq 18 at device 4.0 on pci0
ohci0: [ITHREAD]
usbus0: <nVidia nForce MCP79 USB Controller> on ohci0
ehci0: <NVIDIA nForce MCP79 USB 2.0 controller> mem 0x93489200-0x934892ff irq 19 at device 4.1 on pci0
ehci0: [ITHREAD]
usbus1: EHCI version 1.0
usbus1: <NVIDIA nForce MCP79 USB 2.0 controller> on ehci0
ohci1: <nVidia nForce MCP79 USB Controller> mem 0x93487000-0x93487fff irq 20 at device 6.0 on pci0
ohci1: [ITHREAD]
usbus2: <nVidia nForce MCP79 USB Controller> on ohci1
ehci1: <NVIDIA nForce MCP79 USB 2.0 controller> mem 0x93489100-0x934891ff irq 21 at device 6.1 on pci0
ehci1: [ITHREAD]
usbus3: EHCI version 1.0
usbus3: <NVIDIA nForce MCP79 USB 2.0 controller> on ehci1
hdac0: <NVidia MCP79 High Definition Audio Controller> mem 0x93480000-0x93483fff irq 22 at device 8.0 on pci0
hdac0: HDA Driver Revision: 20100226_0142
hdac0: [ITHREAD]
pcib1: <PCI-PCI bridge> at device 9.0 on pci0
pci1: <PCI bus> on pcib1
nfe0: <NVIDIA nForce MCP79 Networking Adapter> port 0x21e0-0x21e7 mem 0x93486000-0x93486fff,0x93489000-0x934890ff,0x93489300-0x9348930f irq 23 at device 10.0 on pci0
miibus0: <MII bus> on nfe0
rgephy0: <RTL8169S/8110S/8211B media interface> PHY 1 on miibus0
rgephy0: 10baseT, 10baseT-FDX, 100baseTX, 100baseTX-FDX, 1000baseT, 1000baseT-FDX, auto
nfe0: Ethernet address: 00:25:4b:cd:5a:7e
nfe0: [FILTER]
atapci0: <nVidia nForce MCP79 SATA300 controller> port 0x21d8-0x21df,0x21ec-0x21ef,0x21d0-0x21d7,0x21e8-0x21eb,0x21c0-0x21cf mem 0x93484000-0x93485fff irq 16 at device 11.0 on pci0
atapci0: [ITHREAD]
atapci0: AHCI v1.20 controller with 6 3Gbps ports, PM supported
ata2: <ATA channel 0> on atapci0
ata2: [ITHREAD]
ata3: <ATA channel 1> on atapci0
ata3: [ITHREAD]
pcib2: <ACPI PCI-PCI bridge> at device 16.0 on pci0
pci2: <ACPI PCI bus> on pcib2
Bug: the passed in resource buffer is wrong, Resource->StringLength=1, but the real string length is 8
(null) from acpi0vgapci0: <VGA-compatible display> port 0x1000-0x107f mem 0x92000000-0x92ffffff,0x80000000-0x8fffffff,0x90000000-0x91ffffff irq 17 at device 0.0 on pci2
pcib3: <ACPI PCI-PCI bridge> at device 21.0 on pci0
pci3: <ACPI PCI bus> on pcib3
Bug: the passed in resource buffer is wrong, Resource->StringLength=1, but the real string length is 8
(null) from acpi0pci3: <network> at device 0.0 (no driver attached)
pcib4: <ACPI PCI-PCI bridge> at device 22.0 on pci0
pci4: <ACPI PCI bus> on pcib4
Bug: the passed in resource buffer is wrong, Resource->StringLength=1, but the real string length is 10
(null) from acpi0fwohci0: <1394 Open Host Controller Interface> mem 0x93100000-0x93100fff irq 19 at device 0.0 on pci4
fwohci0: [ITHREAD]
fwohci0: OHCI version 1.10 (ROM=0)
fwohci0: No. of Isochronous channels is 8.
fwohci0: EUI64 00:25:4b:ff:fe:cd:5a:7e
fwohci0: invalid speed 7 (fixed to 3).
fwohci0: Phy 1394a available S800, 3 ports.
fwohci0: Link S800, max_rec 4096 bytes.
firewire0: <IEEE1394(FireWire) bus> on fwohci0
fwe0: <Ethernet over FireWire> on firewire0
if_fwe0: Fake Ethernet address: 02:25:4b:cd:5a:7e
fwe0: Ethernet address: 02:25:4b:cd:5a:7e
fwip0: <IP over FireWire> on firewire0
fwip0: Firewire address: 00:25:4b:ff:fe:cd:5a:7e @ 0xfffe00000000, S800, maxrec 4096
sbp0: <SBP-2/SCSI over FireWire> on firewire0
dcons_crom0: <dcons configuration ROM> on firewire0
dcons_crom0: bus_addr 0x11f4000
fwohci0: Initiate bus reset
fwohci0: fwohci_intr_core: BUS reset
fwohci0: fwohci_intr_core: node_id=0x00000000, SelfID Count=2, CYCLEMASTER mode
battery0: <ACPI Control Method Battery> on acpi0
atrtc0: <AT realtime clock> port 0x70-0x77 on acpi0
RTC BIOS diagnostic error f3<clock_battery,ROM_cksum,config_unit,memory_size>
atrtc0: [FILTER]
Event timer "RTC" frequency 32768 Hz quality 0
attimer0: <AT timer> port 0x40-0x43 on acpi0
Timecounter "i8254" frequency 1193182 Hz quality 0
attimer0: [FILTER]
Event timer "i8254" frequency 1193182 Hz quality 100
orm0: <ISA Option ROM> at iomem 0xc0000-0xce7ff on isa0
sc0: <System console> at flags 0x100 on isa0
sc0: VGA <16 virtual consoles, flags=0x300>
vga0: <Generic ISA VGA> at port 0x3c0-0x3df iomem 0xa0000-0xbffff on isa0
ppc0: cannot reserve I/O port range
est0: <Enhanced SpeedStep Frequency Control> on cpu0
p4tcc0: <CPU Frequency Thermal Control> on cpu0
est1: <Enhanced SpeedStep Frequency Control> on cpu1
p4tcc1: <CPU Frequency Thermal Control> on cpu1
Starting kernel event timers: LAPIC @ 1000Hz, i8254 @ 128Hz
Timecounters tick every 1.000 msec
firewire0: 1 nodes, maxhop <= 0 cable IRM irm(0) (me)
firewire0: bus manager 0
usbus0: 12Mbps Full Speed USB v1.0
usbus1: 480Mbps High Speed USB v2.0
usbus2: 12Mbps Full Speed USB v1.0
usbus3: 480Mbps High Speed USB v2.0
ad4: 152627MB <FUJITSU MJA2160BH FFS G1 0081001D> at ata2-master UDMA100 SATA 1.5Gb/s
ugen0.1: <nVidia> at usbus0
uhub0: <nVidia OHCI root HUB, class 9/0, rev 1.00/1.00, addr 1> on usbus0
ugen1.1: <nVidia> at usbus1
uhub1: <nVidia EHCI root HUB, class 9/0, rev 2.00/1.00, addr 1> on usbus1
ugen2.1: <nVidia> at usbus2
uhub2: <nVidia OHCI root HUB, class 9/0, rev 1.00/1.00, addr 1> on usbus2
ugen3.1: <nVidia> at usbus3
uhub3: <nVidia EHCI root HUB, class 9/0, rev 2.00/1.00, addr 1> on usbus3
acd0: DVDR <MATSHITADVD-R UJ-868/KB19> at ata3-master UDMA66 SATA 1.5Gb/s
hdac0: HDA Codec #0: Cirrus Logic CS4206
pcm0: <HDA Cirrus Logic CS4206 PCM #0 Analog> at cad 0 nid 1 on hdac0
pcm1: <HDA Cirrus Logic CS4206 PCM #1 Analog> at cad 0 nid 1 on hdac0
pcm2: <HDA Cirrus Logic CS4206 PCM #2 Digital> at cad 0 nid 1 on hdac0
GEOM: ad4p3: geometry does not match label (255h,63s != 16h,63s).
GEOM: ad4p3: media size does not match label.
GEOM: gpt/Untitled: geometry does not match label (255h,63s != 16h,63s).
GEOM: gpt/Untitled: media size does not match label.
GEOM: gptid/2027da8d-8557-46dc-b0b2-9481d6ca9ef4: geometry does not match label (255h,63s != 16h,63s).
GEOM: gptid/2027da8d-8557-46dc-b0b2-9481d6ca9ef4: media size does not match label.
uhub2: 5 ports with 5 removable, self powered
uhub0: 7 ports with 7 removable, self powered
uhub3: 5 ports with 5 removable, self powered
uhub1: 7 ports with 7 removable, self powered
ugen2.2: <Apple Inc.> at usbus2
uhub4: <Apple Inc. BRCM2046 Hub, class 9/0, rev 2.00/1.00, addr 2> on usbus2
ugen3.2: <Apple> at usbus3
umass0: <Apple Card Reader, class 0/0, rev 2.00/98.33, addr 2> on usbus3
umass0: SCSI over Bulk-Only; quirks = 0x0000
ugen1.2: <Apple Inc.> at usbus1
(null) from uhub1uhub4: 3 ports with 0 removable, self powered
umass0:1:0:-1: Attached to scbus1
(probe7:umass-sim0:0:0:0): TEST UNIT READY. CDB: 0 0 0 0 0 0
(probe7:umass-sim0:0:0:0): CAM status: SCSI Status Error
(probe7:umass-sim0:0:0:0): SCSI status: Check Condition
(probe7:umass-sim0:0:0:0): SCSI sense: NOT READY asc:3a,0 (Medium not present)
SMP: AP CPU #1 Launched!
WARNING: WITNESS option enabled, expect reduced performance.
da0 at umass-sim0 bus 0 scbus1 target 0 lun 0
da0: <APPLE SD Card Reader 1.00> Removable Direct Access SCSI-0 device
da0: 40.000MB/s transfers
da0: Attempt to query device size failed: NOT READY, Medium not present
Root mount waiting for: usbus1
ugen2.3: <Apple Inc.> at usbus2
(null) from uhub4Trying to mount root from ufs:/dev/ufs/hpsRoot
ugen0.2: <Apple Computer, Inc.> at usbus0
uhid0: <Apple Computer, Inc. IR Receiver, class 0/0, rev 2.00/0.16, addr 2> on usbus0
ugen2.4: <vendor 0x05ac> at usbus2
ukbd0: <vendor 0x05ac product 0x820a, class 0/0, rev 2.00/1.00, addr 4> on usbus2
kbd1 at ukbd0
ugen0.3: <Apple Inc.> at usbus0
ukbd1: <Apple Internal Keyboard> on usbus0
kbd2 at ukbd1
uhid1: <Touchpad> on usbus0
ums0: <Touchpad> on usbus0
ums0: 3 buttons and [XY] coordinates ID=2
ugen2.5: <vendor 0x05ac> at usbus2
ums1: <vendor 0x05ac product 0x820b, class 0/0, rev 2.00/1.00, addr 5> on usbus2
ums1: 3 buttons and [XY] coordinates ID=2
GEOM: gpt/Untitled: geometry does not match label (255h,63s != 16h,63s).
GEOM: gpt/Untitled: media size does not match label.
GEOM: gptid/2027da8d-8557-46dc-b0b2-9481d6ca9ef4: geometry does not match label (255h,63s != 16h,63s).
GEOM: gptid/2027da8d-8557-46dc-b0b2-9481d6ca9ef4: media size does not match label.
(null) from uhub1
lock order reversal:
1st 0xffffff0002bce278 ufs (ufs) @ /usr/src/sys/kern/vfs_subr.c:2090
2nd 0xffffff80239d9f38 bufwait (bufwait) @ /usr/src/sys/ufs/ffs/ffs_softdep.c:11357
3rd 0xffffff0002bce098 ufs (ufs) @ /usr/src/sys/kern/vfs_subr.c:2090
KDB: stack backtrace:
db_trace_self_wrapper() at db_trace_self_wrapper+0x2a
_witness_debugger() at _witness_debugger+0x2e
witness_checkorder() at witness_checkorder+0x81e
__lockmgr_args() at __lockmgr_args+0xd11
ffs_lock() at ffs_lock+0x8c
VOP_LOCK1_APV() at VOP_LOCK1_APV+0x9b
_vn_lock() at _vn_lock+0x47
vget() at vget+0x7b
vfs_hash_get() at vfs_hash_get+0xd5
ffs_vgetf() at ffs_vgetf+0x48
softdep_sync_metadata() at softdep_sync_metadata+0x41b
ffs_syncvnode() at ffs_syncvnode+0x213
ffs_truncate() at ffs_truncate+0x18c
ufs_direnter() at ufs_direnter+0x6f1
ufs_mkdir() at ufs_mkdir+0x41f
VOP_MKDIR_APV() at VOP_MKDIR_APV+0x93
kern_mkdirat() at kern_mkdirat+0x270
syscallenter() at syscallenter+0xf0
syscall() at syscall+0x4c
Xfast_syscall() at Xfast_syscall+0xe1
--- syscall (136, FreeBSD ELF64, mkdir), rip = 0x800730aac, rsp = 0x7fffffffec38, rbp = 0x7fffffffef36 ---
ugen3.3: <Kingston> at usbus3
umass1: <Kingston DataTraveler 2.0, class 0/0, rev 2.00/1.10, addr 3> on usbus3
umass1: SCSI over Bulk-Only; quirks = 0x0000
umass1:2:1:-1: Attached to scbus2
(probe0:umass-sim1:1:0:0): TEST UNIT READY. CDB: 0 0 0 0 0 0
(probe0:umass-sim1:1:0:0): CAM status: SCSI Status Error
(probe0:umass-sim1:1:0:0): SCSI status: Check Condition
(probe0:umass-sim1:1:0:0): SCSI sense: UNIT ATTENTION asc:28,0 (Not ready to ready change, medium may have changed)
da1 at umass-sim1 bus 1 scbus2 target 0 lun 0
da1: <Kingston DataTraveler 2.0 PMAP> Removable Direct Access SCSI-0 device
da1: 40.000MB/s transfers
da1: 3842MB (7868416 512 byte sectors: 255H 63S/T 489C)
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