Pool status is 'Unknown'

BadMike · Post by **BadMike** » 24 May 2013 23:56

I have a 5 disk RaidZ2 array, all the disks appear healthy but the pool status is unknown.

How can I recover my data, do I delete and recreate the pool?

Output from the report generator is below:

NAS4Free 9.1.0.1 (revision 724) x64-embedded
ALASKA A M I Intel(R) Core(TM) i3-3225 CPU @ 3.30GHz 8678MiB RAM

mem 0xf7c13000-0xf7c133ff irq
23 at device 29.0 on pci0 PHY 1 on miibus0 Intel Panther Point USB 3.0 controller
mem 0xf7c00000-0xf7c0ffff irq
16 at device 20.0 on pci0 bus=2 hubaddr=4 port=1 devaddr=3 interface=0
RTL8169S/8110S/8211 1000BASE-T media interface bus=1 hubaddr=1 port=2
devaddr=2 interface=0 Intel Panther Point USB 2.0 controller mem 0xf7c14000-0xf7c143ff irq 16 at
device 26.0 on pci0 bus=1 hubaddr=1 port=1 devaddr=2 interface=0

Any help much appreciated!

couper101 · Post by **couper101** » 25 May 2013 15:28

How can I recover my data, do I delete and recreate the pool? NO! that will destroy your data....

You'll need to provide more info if you want help. More system info and what was going on when it stopped working ect...
Get to the command line and give us the out put of the following for starters.

zpool status -v
zpool list -v

BadMike · Post by **BadMike** » 25 May 2013 17:57

I was copying some files to the NAS when it rebooted, when it came back the pool was gone.

I have run the two commands you suggested, the output doesn't look very promising:

$ zpool status -v
no pools available

$ zpool list -v
no pools available

couper101 · Post by **couper101** » 26 May 2013 12:23

cat /var/run/dmesg.boot it will be a big long list. post it all. We are looking to see what hard drives, the system is seeing at boot.

zpool import see what this command returns.

BadMike · Post by **BadMike** » 26 May 2013 12:43

Code: Select all

$ cat /var/run/dmesg.boot 
Copyright (c) 1992-2012 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 9.1-RELEASE-p3 #0 r250880M: Tue May 21 21:48:08 CEST 2013
    root@dev.nas4free.org:/usr/obj/nas4free/usr/src/sys/NAS4FREE-amd64 amd64
CPU: Intel(R) Core(TM) i3-3225 CPU @ 3.30GHz (3292.59-MHz K8-class CPU)
  Origin = "GenuineIntel"  Id = 0x306a9  Family = 6  Model = 3a  Stepping = 9
  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=0x3d9ae3bf<SSE3,PCLMULQDQ,DTES64,MON,DS_CPL,VMX,EST,TM2,SSSE3,CX16,xTPR,PDCM,PCID,SSE4.1,SSE4.2,POPCNT,TSCDLT,XSAVE,OSXSAVE,AVX,F16C>
  AMD Features=0x28100800<SYSCALL,NX,RDTSCP,LM>
  AMD Features2=0x1<LAHF>
  TSC: P-state invariant, performance statistics
real memory  = 8589934592 (8192 MB)
avail memory = 7887101952 (7521 MB)
Event timer "LAPIC" quality 600
ACPI APIC Table: <ALASKA A M I>
FreeBSD/SMP: Multiprocessor System Detected: 4 CPUs
FreeBSD/SMP: 1 package(s) x 2 core(s) x 2 SMT threads
 cpu0 (BSP): APIC ID:  0
 cpu1 (AP): APIC ID:  1
 cpu2 (AP): APIC ID:  2
 cpu3 (AP): APIC ID:  3
ioapic0 <Version 2.0> irqs 0-23 on motherboard
kbd1 at kbdmux0
cryptosoft0: <software crypto> on motherboard
acpi0: <ALASKA A M I> on motherboard
acpi0: Power Button (fixed)
acpi0: reservation of 67, 1 (4) failed
cpu0: <ACPI CPU> on acpi0
cpu1: <ACPI CPU> on acpi0
cpu2: <ACPI CPU> on acpi0
cpu3: <ACPI CPU> on acpi0
hpet0: <High Precision Event Timer> iomem 0xfed00000-0xfed003ff on acpi0
Timecounter "HPET" frequency 14318180 Hz quality 950
Event timer "HPET" frequency 14318180 Hz quality 550
Event timer "HPET1" frequency 14318180 Hz quality 440
Event timer "HPET2" frequency 14318180 Hz quality 440
Event timer "HPET3" frequency 14318180 Hz quality 440
Event timer "HPET4" frequency 14318180 Hz quality 440
atrtc0: <AT realtime clock> port 0x70-0x77 irq 8 on acpi0
atrtc0: Warning: Couldn't map I/O.
Event timer "RTC" frequency 32768 Hz quality 0
attimer0: <AT timer> port 0x40-0x43,0x50-0x53 irq 0 on acpi0
Timecounter "i8254" frequency 1193182 Hz quality 0
Event timer "i8254" frequency 1193182 Hz quality 100
Timecounter "ACPI-fast" frequency 3579545 Hz quality 900
acpi_timer0: <24-bit timer at 3.579545MHz> port 0x408-0x40b on acpi0
pcib0: <ACPI Host-PCI bridge> port 0xcf8-0xcff on acpi0
pci0: <ACPI PCI bus> on pcib0
vgapci0: <VGA-compatible display> port 0xf000-0xf03f mem 0xf7800000-0xf7bfffff,0xe0000000-0xefffffff irq 16 at device 2.0 on pci0
agp0: <IvyBridge desktop GT2 IG> on vgapci0
agp0: aperture size is 256M, detected 65532k stolen memory
xhci0: <Intel Panther Point USB 3.0 controller> mem 0xf7c00000-0xf7c0ffff irq 16 at device 20.0 on pci0
xhci0: 32 byte context size.
usbus0 on xhci0
pci0: <simple comms> at device 22.0 (no driver attached)
ehci0: <Intel Panther Point USB 2.0 controller> mem 0xf7c14000-0xf7c143ff irq 16 at device 26.0 on pci0
usbus1: EHCI version 1.0
usbus1 on ehci0
pcib1: <ACPI PCI-PCI bridge> irq 16 at device 28.0 on pci0
pci1: <ACPI PCI bus> on pcib1
pcib2: <ACPI PCI-PCI bridge> irq 16 at device 28.4 on pci0
pci2: <ACPI PCI bus> on pcib2
re0: <RealTek 8168/8111 B/C/CP/D/DP/E/F PCIe Gigabit Ethernet> port 0xe000-0xe0ff mem 0xf0004000-0xf0004fff,0xf0000000-0xf0003fff irq 16 at device 0.0 on pci2
re0: Using 1 MSI-X message
re0: Chip rev. 0x2c800000
re0: MAC rev. 0x00000000
miibus0: <MII bus> on re0
rgephy0: <RTL8169S/8110S/8211 1000BASE-T media interface> PHY 1 on miibus0
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
re0: Ethernet address: 90:2b:34:95:7c:5b
ehci1: <Intel Panther Point USB 2.0 controller> mem 0xf7c13000-0xf7c133ff irq 23 at device 29.0 on pci0
usbus2: EHCI version 1.0
usbus2 on ehci1
pcib3: <ACPI PCI-PCI bridge> at device 30.0 on pci0
pci3: <ACPI PCI bus> on pcib3
isab0: <PCI-ISA bridge> at device 31.0 on pci0
isa0: <ISA bus> on isab0
ahci0: <Intel Panther Point AHCI SATA controller> port 0xf0b0-0xf0b7,0xf0a0-0xf0a3,0xf090-0xf097,0xf080-0xf083,0xf060-0xf07f mem 0xf7c12000-0xf7c127ff irq 19 at device 31.2 on pci0
ahci0: AHCI v1.30 with 6 6Gbps ports, Port Multiplier not supported
ahcich0: <AHCI channel> at channel 0 on ahci0
ahcich1: <AHCI channel> at channel 1 on ahci0
ahcich2: <AHCI channel> at channel 2 on ahci0
ahcich3: <AHCI channel> at channel 3 on ahci0
ahcich4: <AHCI channel> at channel 4 on ahci0
ahcich5: <AHCI channel> at channel 5 on ahci0
pci0: <serial bus, SMBus> at device 31.3 (no driver attached)
acpi_button0: <Power Button> on acpi0
acpi_tz0: <Thermal Zone> on acpi0
acpi_tz1: <Thermal Zone> on acpi0
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
atkbdc0: <Keyboard controller (i8042)> at port 0x60,0x64 on isa0
atkbd0: <AT Keyboard> irq 1 on atkbdc0
kbd0 at atkbd0
atkbd0: [GIANT-LOCKED]
ppc0: cannot reserve I/O port range
ctl: CAM Target Layer loaded
coretemp0: <CPU On-Die Thermal Sensors> on cpu0
est0: <Enhanced SpeedStep Frequency Control> on cpu0
p4tcc0: <CPU Frequency Thermal Control> on cpu0
coretemp1: <CPU On-Die Thermal Sensors> on cpu1
est1: <Enhanced SpeedStep Frequency Control> on cpu1
p4tcc1: <CPU Frequency Thermal Control> on cpu1
coretemp2: <CPU On-Die Thermal Sensors> on cpu2
est2: <Enhanced SpeedStep Frequency Control> on cpu2
p4tcc2: <CPU Frequency Thermal Control> on cpu2
coretemp3: <CPU On-Die Thermal Sensors> on cpu3
est3: <Enhanced SpeedStep Frequency Control> on cpu3
p4tcc3: <CPU Frequency Thermal Control> on cpu3
ZFS filesystem version 5
ZFS storage pool version 28
Timecounters tick every 1.000 msec
ipfw2 (+ipv6) initialized, divert loadable, nat loadable, rule-based forwarding disabled, default to accept, logging disabled
iSCSI boot driver version 0.2.6
md0: Preloaded image </mfsroot> 232783872 bytes at 0xffffffff819a3c58
usbus0: 5.0Gbps Super Speed USB v3.0
usbus1: 480Mbps High Speed USB v2.0
usbus2: 480Mbps High Speed USB v2.0
ugen0.1: <0x8086> at usbus0
uhub0: <0x8086 XHCI root HUB, class 9/0, rev 3.00/1.00, addr 1> on usbus0
ugen1.1: <Intel> at usbus1
uhub1: <Intel EHCI root HUB, class 9/0, rev 2.00/1.00, addr 1> on usbus1
ugen2.1: <Intel> at usbus2
uhub2: <Intel EHCI root HUB, class 9/0, rev 2.00/1.00, addr 1> on usbus2
uhub0: 8 ports with 8 removable, self powered
uhub1: 2 ports with 2 removable, self powered
uhub2: 2 ports with 2 removable, self powered
ugen1.2: <vendor 0x8087> at usbus1
uhub3: <vendor 0x8087 product 0x0024, class 9/0, rev 2.00/0.00, addr 2> on usbus1
ugen2.2: <vendor 0x8087> at usbus2
uhub4: <vendor 0x8087 product 0x0024, class 9/0, rev 2.00/0.00, addr 2> on usbus2
uhub3: 6 ports with 6 removable, self powered
uhub4: 6 ports with 6 removable, self powered
ugen1.3: <Pretec> at usbus1
umass0: <Pretec UG-04GB, class 0/0, rev 2.00/11.00, addr 3> on usbus1
umass0:  SCSI over Bulk-Only; quirks = 0x0100
umass0:7:0:-1: Attached to scbus7
da0 at umass-sim0 bus 0 scbus7 target 0 lun 0
da0: <Pretec UltimateGuard 1100> Removable Direct Access SCSI-4 device 
da0: 40.000MB/s transfers
da0: 3862MB (7909376 512 byte sectors: 255H 63S/T 492C)
ada0 at ahcich0 bus 0 scbus0 target 0 lun 0
ada0: <WDC WD30EZRX-00MMMB0 80.00A80> ATA-8 SATA 3.x device
ada0: 600.000MB/s transfers (SATA 3.x, UDMA6, PIO 8192bytes)
ada0: Command Queueing enabled
ada0: 2861588MB (5860533168 512 byte sectors: 16H 63S/T 16383C)
ada0: Previously was known as ad4
ada1 at ahcich1 bus 0 scbus1 target 0 lun 0
ada1: <WDC WD30EZRX-00MMMB0 80.00A80> ATA-8 SATA 3.x device
ada1: 300.000MB/s transfers (SATA 2.x, UDMA6, PIO 8192bytes)
ada1: Command Queueing enabled
ada1: 2861588MB (5860533168 512 byte sectors: 16H 63S/T 16383C)
ada1: Previously was known as ad6
ada2 at ahcich2 bus 0 scbus2 target 0 lun 0
ada2: <WDC WD30EZRX-00MMMB0 80.00A80> ATA-8 SATA 3.x device
ada2: 300.000MB/s transfers (SATA 2.x, UDMA6, PIO 8192bytes)
ada2: Command Queueing enabled
ada2: 2861588MB (5860533168 512 byte sectors: 16H 63S/T 16383C)
ada2: Previously was known as ad8
ada3 at ahcich3 bus 0 scbus3 target 0 lun 0
ada3: <WDC WD30EZRX-00DC0B0 80.00A80> ATA-9 SATA 3.x device
ada3: 300.000MB/s transfers (SATA 2.x, UDMA6, PIO 8192bytes)
ada3: Command Queueing enabled
ada3: 2861588MB (5860533168 512 byte sectors: 16H 63S/T 16383C)
ada3: Previously was known as ad10
ada4 at ahcich4 bus 0 scbus4 target 0 lun 0
ada4: <WDC WD30EZRX-00MMMB0 80.00A80> ATA-8 SATA 3.x device
ada4: 300.000MB/s transfers (SATA 2.x, UDMA6, PIO 8192bytes)
ada4: Command Queueing enabled
ada4: 2861588MB (5860533168 512 byte sectors: 16H 63S/T 16383C)
ada4: Previously was known as ad12
SMP: AP CPU #1 Launched!
SMP: AP CPU #2 Launched!
SMP: AP CPU #3 Launched!
Timecounter "TSC-low" frequency 12861667 Hz quality 1000
GEOM: da0: geometry does not match label (16h,63s != 255h,63s).
GEOM: da0: media size does not match label.
Trying to mount root from ufs:/dev/md0 []...
GEOM_NOP: Device ada0.nop created.
GEOM_NOP: Device ada1.nop created.
GEOM_NOP: Device ada2.nop created.
GEOM_NOP: Device ada3.nop created.
GEOM_NOP: Device ada4.nop created.

$ zpool import
pool: VPoolR5Z2
id: 13223230138929577216
state: ONLINE
action: The pool can be imported using its name or numeric identifier.
config:

VPoolR5Z2 ONLINE
raidz2-0 ONLINE
ada0.nop ONLINE
ada1.nop ONLINE
ada2.nop ONLINE
ada3.nop ONLINE
ada4.nop ONLINE

couper101 · Post by **couper101** » 26 May 2013 13:48

VPoolR5Z2 is that the name of the zpool you want to access?

zpool import VPoolR5Z2 try that. If that don't work. you'll have to wait till someone with more knowledge than me reads this thread. One thing, dont use '-f' during the import without getting back to us.

Now to sort out the nas4free GUI after you import, we will have to ask other people on the forum. I dont really use the GUI for ZFS.
The next question is why the zpool was unknown in the first place.

BadMike · Post by **BadMike** » 26 May 2013 16:46

Thanks for all your help so far.

zpool import VPoolR5Z2
Cannot import 'VpoolR5Z2' : pool may be in use from other system use '-f' to import anyway

I have resisted the urge to use '-f' as you suggested.

Cheers

sleid · Post by **sleid** » 26 May 2013 17:26

BadMike · Post by **BadMike** » 26 May 2013 18:25

Hi

This is from the Disks Management screen in the GUI; 5 x 3TB drives and a 4GB flashdrive as the boot device.

ada0 2861589MB WDC WD30EZRX-00MMMB0 80.00A80 WDC WD30EZRX-00MMMB0 WD-WCAWZ2959337 Always on ZFS storage pool device ONLINE
ada1 2861589MB WDC WD30EZRX-00MMMB0 80.00A80 WDC WD30EZRX-00MMMB0 WD-WCAWZ2927513 Always on ZFS storage pool device ONLINE
ada2 2861589MB WDC WD30EZRX-00MMMB0 80.00A80 WDC WD30EZRX-00MMMB0 WD-WCAWZ2872124 Always on ZFS storage pool device ONLINE
ada3 2861589MB WDC WD30EZRX-00DC0B0 80.00A80 WDC WD30EZRX-00DC0B0 WD-WMC1T0324870 Always on ZFS storage pool device ONLINE
ada4 2861589MB WDC WD30EZRX-00MMMB0 80.00A80 WDC WD30EZRX-00MMMB0 WD-WCAWZ2937377 Always on ZFS storage pool device ONLINE
da0 3862MB Pretec UltimateGuard 1100 Pretec UltimateGuard 1100 TT00000000001549 Always on UFS ONLINE

Yes the config.xml is backed up.

couper101 · Post by **couper101** » 26 May 2013 21:18

zpool import VPoolR5Z2
Cannot import 'VpoolR5Z2' : pool may be in use from other system use '-f' to import anyway

That error message looks ok.

Go ahead and use -f

zpool import -f VPoolR5Z2

BadMike · Post by **BadMike** » 26 May 2013 22:43

cannot import 'VPoolR5Z2' : I/O error
Destroy and re-create the pool from a backup source.

I am guessing that's not good...

I didn't even realise I could backup the pool, needless to say I don't have a backup.

sleid · Post by **sleid** » 26 May 2013 22:50

BadMike · Post by **BadMike** » 26 May 2013 22:58

$ zpool import -f
pool: VPoolR5Z2
id: 13223230138929577216
state: ONLINE
action: The pool can be imported using its name or numeric identifier.
config:

VPoolR5Z2 ONLINE
raidz2-0 ONLINE
ada0.nop ONLINE
ada1.nop ONLINE
ada2.nop ONLINE
ada3.nop ONLINE
ada4.nop ONLINE

I am not sure how to answer your first question, the drives are all identical but I don't know how to check the ZFS configuration.

sleid · Post by **sleid** » 26 May 2013 23:20

NO !!!

goto disk --> zfs--> configuration -->Detected what you see ?
------------------------------------------->Current what you see ?

zpool import -D

BadMike · Post by **BadMike** » 26 May 2013 23:29

OK

Detected configuration:

Pools (0)
Virtual devices (0)
Datasets (0)
Volumes (0)

Current configuration:

Code: Select all

Pools (1)
Name	Size	Used	Free	Dedup	Health	Mount point	AltRoot
VPoolR5Z2	Unknown	Unknown (Unknown)	Unknown		Unknown		-

Virtual devices (1)
Name	Type	Pool	Devices
R5Z2	raidz2	VPoolR5Z2	/dev/ada0, /dev/ada1, /dev/ada2, /dev/ada3, /dev/ada4

Datasets (0)
Name	Pool	Compression	Dedup	Sync	Canmount	Quota	Extended attributes	Readonly	Snapshot Visibility

Volumes (1)
Name	Pool	Size	Blocksize	Sparse	Compression	Dedup	Sync
zVolume1	VPoolR5Z2	7T	-	-	off	off	standard

sleid · Post by **sleid** » 26 May 2013 23:30

zpool import -D

BadMike · Post by **BadMike** » 26 May 2013 23:39

zpool import -D

no pools available to import

couper101 · Post by **couper101** » 27 May 2013 01:41

Has system been rebooted since problem started? Am going to guess no! Try a reboot and i thinking it might crash at boot.
Power off the system, check all the connection in the system.
Reboot and try an import again.

Next, if that dont work. Power off and disconnect one drive, reboot and try to import. Repeat this by disconnecting one drive at a time. Hopefully zfs will be able to import the zpool minus a problem drive. Once its imported with minus one drive, reboot and reconnect the problem drive, zfs should them be able to sort its self out from there.

If that dont work, your in trouble....

Post by **kkd** » 27 May 2013 10:15

Hi

read this: http://docs.oracle.com/cd/E19082-01/817 ... index.html

Daniel

couper101 · Post by **couper101** » 27 May 2013 12:49

Thats a good document above. The last two paragraphs apply i think. Try, zpool clear VPoolR5Z2

Post by **kkd** » 27 May 2013 12:54

couper101 wrote:Thats a good document above. The last two paragraphs apply i think. Try, zpool clear VPoolR5Z2

it worths 5 mins to read the doc. after that try anything...

BadMike · Post by **BadMike** » 27 May 2013 15:11

I've been through the doc and tried pretty much everything, but no joy.

I've accepted I am going to have to rebuild my NAS4Free box and restore all the files from a backup.

The big question is what can I do differently next time to stop this happening again? I am beginning to the F in ZFS stands for Fragile...

Post by **kkd** » 27 May 2013 15:38

I always use mirror=RAID1.
If u really need performace use raid10, but never raid 5 or raidZ. Hard to rebuild, and can fragile.
http://en.wikipedia.org/wiki/Non-standa ... els#RAID-Z
"RAID-Z is not actually a kind of RAID..."

and never ever forget backup regularly!!!!

ps: ZFS is great, but u need memory (and cpu).

Post by **kkd** » 27 May 2013 15:52

@BadMike
If u want to build better nas using raid: http://blog.kj.stillabower.net/?p=93
u'll suprise.

Post by **kkd** » 27 May 2013 18:22

and use wd nas red hdds

couper101 · Post by **couper101** » 27 May 2013 21:29

Did you try this?

"Next, if that dont work. Power off and disconnect one drive, reboot and try to import. Repeat this by disconnecting one drive at a time. Hopefully zfs will be able to import the zpool minus a problem drive. Once its imported with minus one drive, reboot and reconnect the problem drive, zfs should them be able to sort its self out from there."

Post by **kkd** » 27 May 2013 22:38

i dont think this will work, because of the error appeared after a reboot while copying to a raidz. there is no bad drive, it was a software error.

couper101 · Post by **couper101** » 28 May 2013 01:17

I dont think there will be a hardware fault either. However i stand by what i suggested, it will force the software to go at things from a different angle so to speak.

Post by **kkd** » 28 May 2013 08:55

couper101 wrote:I dont think there will be a hardware fault either. However i stand by what i suggested, it will force the software to go at things from a different angle so to speak.

sure, worths a try.

BadMike · Post by **BadMike** » 28 May 2013 16:06

I tried with each drive, no joy.

So... Given that I have an i3 CPU, 8GB Ram and 5x3TB WD Greens, what would you recommend as my best config?

Ideally I want to access via iSCSI with reasonable read performance (write is not so critical).

Apologies if this is going off topic now!

XigmaNAS

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