Volume storage (ZFS) status is UNKNOWN - zpool import fails

[TheWizzard]

Hi,
First of all, I want to thank the makers of FreeNAS! I was using FreeNAS since a little over two years without any problems in a small fileserver-setup. I am running 4 3TB Hdds in a ZFS storage pool with replication.

The only issues i encountered were that from time to time the web-interface would no longer refresh but rebooting the system always worked.

Today I could no longer access neither my shares nor the web interface, so I had to shutdown the systems (maybe the system encountered a power outage tonight but this is just a guess and I have no proof).

After rebooting, the system started (it used to be 8.3) but the storage showed a warning and status unknown. I was unable to auto-import the drives.

After searching the web and the forum, prepared a new USB drive with a clean FreeNAS installation (9.2.1.8) and booted from that device. It works, but it doesn't recognize the storage, although the volumes are visible. Importing the storage didn't work.

Following another hint from the forum, I imported the configuration files from the old installation and the storage is recognized, but I end up with the same yellow warning and ZFS status unknown.

Trying to import the zpool manually didn't work either (please find the status enclosed) and I thought it might be better to ask now before I damage anything.

Could you please help me?

I tried to describe my problem as good as possible, but I am sure a missed a lot information that you guys might need - just let me know and I'll try to provide as much detail as possible.

Thanks and best regards,
Dominik

Code:

[root@freenas ~]# zpool status                                                 
no pools available                                                             
[root@freenas ~]# zpool import                                                 
   pool: storage                                                               
     id: 7468699150851196970                                                   
  state: UNAVAIL                                                               
status: The pool was last accessed by another system.                         
action: The pool cannot be imported due to damaged devices or data.           
   see: http://illumos.org/msg/ZFS-8000-EY                                     
config:                                                                       
                                                                               
        storage                                         UNAVAIL  insufficient re
plicas                                                                         
          raidz1-0                                      UNAVAIL  insufficient re
plicas                                                                         
            gptid/e30eebe4-42e1-11e2-911d-00151731a67f  ONLINE                 
            4694448216509377380                         UNAVAIL  cannot open   
            16020346307811284986                        UNAVAIL  cannot open   
            gptid/e4d80488-42e1-11e2-911d-00151731a67f  ONLINE                 
[root@freenas ~]#   

 

[anodos]

I'm not a ZFS expert, but it looks like two of your drives are missing. In raidz1 that's fatal. Do you have backups?

 

[TheWizzard]

actually, that _was_ my backup server ;-) No, no further backup exists... :(
This is why I ran it wir replication...
The drives seem to run (physically, motor running) and don't give or gave me S.M.A.R.T. errors... Could it be that the controller went to nirvana (but they're still showing up...)

I really don't know what to do...

EDIT:
zpool import storage gives the following output:

Code:

[root@freenas ~]# zpool import storage                                         
cannot import 'storage': pool may be in use from other system, it was last acces
sed by  (hostid: 0x2d82e648) on Thu Jan  1 01:00:00 1970                       
use '-f' to import anyway  

Should I run -f?

 

[anodos]

actually, that _was_ my backup server ;-) No, no further backup exists... :(
This is why I ran it wir replication...
The drives seem to run (physically, motor running) and don't give or gave me S.M.A.R.T. errors... Could it be that the controller went to nirvana (but they're still showing up...)

I really don't know what to do...

EDIT:
zpool import storage gives the following output:

Code:

[root@freenas ~]# zpool import storage                                       
cannot import 'storage': pool may be in use from other system, it was last acces
sed by  (hostid: 0x2d82e648) on Thu Jan  1 01:00:00 1970                     
use '-f' to import anyway  

Should I run -f?

I would hold off on trying to force the import at this time. It would be better to figure out why two of your drives aren't showing up.
What are your hardware specs?
What type of controller are you using?
Post smartctl output

 

[TheWizzard]

ok, thanks for your reply.
I have 4 x 3TB Seagate Barracuda in a Fujitsu HomeServer Hardware
Sata-Controller is unknown.
I just started booting the system with 3 of 4 HDDs disconnected in order to find out if there is a HW malfunction - so far it seems there isn't.

 

[anodos]

ok, thanks for your reply.
I have 4 x 3TB Seagate Barracuda in a Fujitsu HomeServer Hardware
Sata-Controller is unknown.
I just started booting the system with 3 of 4 HDDs disconnected in order to find out if there is a HW malfunction - so far it seems there isn't.

Amount of RAM and "smartctl -a" output for all drives would be helpful

 

[TheWizzard]

Checked again, and in the Disks view, only two drives are visible.
smartctl (i assume -a) gives no errors in the two visible drives. How do I check the not visible drives?
Thanks!

 

[TheWizzard]

amount of RAM: 2GB (unfortunately, the machine doesn't support more)
How can I copy all the output of smartctl? I cannot "scroll up" in the output (sorry for the noob question)...

 

[TheWizzard]

I should also mention, that in the old installation (8.3.) all 4 drives were still visible in the drives menu this afternoon...

(and, as I forgot it in the other messages: A big THANK YOU to all the helpers so far! thanks for the quick and productive answers!)

 

[anodos]

Enable SSH and use putty to run the commands.

2GB is well below the minimum hardware requirements for FreeNAS. I think the chances of recovery are slim.

You can also try moving the HDDs to a system with 8GB RAM and try booting FreeNAS / importing the pool.

 

[TheWizzard]

Thanks for your answer... Hm, the FAQ section provides this:
FreeNAS Minimum Hardware:

• 64-bit x86 Processor
• 2GB RAM
• 2GB Flash Drive for installation (use 4GB to be sure it's big enough)
• At least one additional disk for storage.
• Wired network port (wireless not supported)
• Computer on the same network with a modern web browser (for management)

And so far it seemed to work (for the last two years...)

I will try to provide the output via SSH...

 

[anodos]

Thanks for your answer... Hm, the FAQ section provides this:
FreeNAS Minimum Hardware:

• 64-bit x86 Processor
• 2GB RAM
• 2GB Flash Drive for installation (use 4GB to be sure it's big enough)
• At least one additional disk for storage.
• Wired network port (wireless not supported)
• Computer on the same network with a modern web browser (for management)

And so far it seemed to work (for the last two years...)

I will try to provide the output via SSH...

Interesting. Probably out of date information. See this: http://olddoc.freenas.org/index.php/Hardware_Requirements#RAM

 

[TheWizzard]

Thanks :-(
btw: I didn't want to be a smartass, I just wanted to reference, where I got the spec from...

Please find enclosed smartctl for one of the two visible drives...

Code:

=== START OF INFORMATION SECTION ===
Model Family:     Seagate Barracuda 7200.14 (AF)
Device Model:     ST3000DM001-1CH166
Serial Number:    Z1F1K3JX
LU WWN Device Id: 5 000c50 04ed3dd6c
Firmware Version: CC24
User Capacity:    3,000,592,982,016 bytes [3.00 TB]
Sector Sizes:     512 bytes logical, 4096 bytes physical
Rotation Rate:    7200 rpm
Device is:        In smartctl database [for details use: -P show]
ATA Version is:   ATA8-ACS T13/1699-D revision 4
SATA Version is:  SATA 3.0, 6.0 Gb/s (current: 3.0 Gb/s)
Local Time is:    Mon Oct 20 22:13:39 2014 CEST

==> WARNING: A firmware update for this drive may be available,
see the following Seagate web pages:
http://knowledge.seagate.com/articles/en_US/FAQ/207931en
http://knowledge.seagate.com/articles/en_US/FAQ/223651en

SMART support is: Available - device has SMART capability.
SMART support is: Enabled

=== START OF READ SMART DATA SECTION ===
SMART overall-health self-assessment test result: PASSED

General SMART Values:
Offline data collection status:  (0x82)    Offline data collection activity
                    was completed without error.
                    Auto Offline Data Collection: Enabled.
Self-test execution status:      (   0)    The previous self-test routine completed
                    without error or no self-test has ever
                    been run.
Total time to complete Offline
data collection:         (  584) seconds.
Offline data collection
capabilities:              (0x7b) SMART execute Offline immediate.
                    Auto Offline data collection on/off support.
                    Suspend Offline collection upon new
                    command.
                    Offline surface scan supported.
                    Self-test supported.
                    Conveyance Self-test supported.
                    Selective Self-test supported.
SMART capabilities:            (0x0003)    Saves SMART data before entering
                    power-saving mode.
                    Supports SMART auto save timer.
Error logging capability:        (0x01)    Error logging supported.
                    General Purpose Logging supported.
Short self-test routine
recommended polling time:      (   1) minutes.
Extended self-test routine
recommended polling time:      ( 329) minutes.
Conveyance self-test routine
recommended polling time:      (   2) minutes.
SCT capabilities:            (0x3085)    SCT Status supported.

SMART Attributes Data Structure revision number: 10
Vendor Specific SMART Attributes with Thresholds:
ID# ATTRIBUTE_NAME          FLAG     VALUE WORST THRESH TYPE      UPDATED  WHEN_FAILED RAW_VALUE
  1 Raw_Read_Error_Rate     0x000f   119   099   006    Pre-fail  Always       -       207751352
  3 Spin_Up_Time            0x0003   095   094   000    Pre-fail  Always       -       0
  4 Start_Stop_Count        0x0032   100   100   020    Old_age   Always       -       52
  5 Reallocated_Sector_Ct   0x0033   100   100   010    Pre-fail  Always       -       0
  7 Seek_Error_Rate         0x000f   061   057   030    Pre-fail  Always       -       8592981722
  9 Power_On_Hours          0x0032   084   084   000    Old_age   Always       -       14612
10 Spin_Retry_Count        0x0013   100   100   097    Pre-fail  Always       -       0
12 Power_Cycle_Count       0x0032   100   100   020    Old_age   Always       -       52
183 Runtime_Bad_Block       0x0032   100   100   000    Old_age   Always       -       0
184 End-to-End_Error        0x0032   100   100   099    Old_age   Always       -       0
187 Reported_Uncorrect      0x0032   100   100   000    Old_age   Always       -       0
188 Command_Timeout         0x0032   100   100   000    Old_age   Always       -       0 0 0
189 High_Fly_Writes         0x003a   100   100   000    Old_age   Always       -       0
190 Airflow_Temperature_Cel 0x0022   065   056   045    Old_age   Always       -       35 (Min/Max 30/35)
191 G-Sense_Error_Rate      0x0032   100   100   000    Old_age   Always       -       0
192 Power-Off_Retract_Count 0x0032   100   100   000    Old_age   Always       -       41
193 Load_Cycle_Count        0x0032   100   100   000    Old_age   Always       -       83
194 Temperature_Celsius     0x0022   035   044   000    Old_age   Always       -       35 (0 21 0 0 0)
197 Current_Pending_Sector  0x0012   100   100   000    Old_age   Always       -       0
198 Offline_Uncorrectable   0x0010   100   100   000    Old_age   Offline      -       0
199 UDMA_CRC_Error_Count    0x003e   200   200   000    Old_age   Always       -       0
240 Head_Flying_Hours       0x0000   100   253   000    Old_age   Offline      -       14612h+32m+02.976s
241 Total_LBAs_Written      0x0000   100   253   000    Old_age   Offline      -       2003186404
242 Total_LBAs_Read         0x0000   100   253   000    Old_age   Offline      -       98608437

SMART Error Log Version: 1
No Errors Logged

SMART Self-test log structure revision number 1
Num  Test_Description    Status                  Remaining  LifeTime(hours)  LBA_of_first_error
# 1  Short offline       Completed without error       00%     13420         -
# 2  Short offline       Completed without error       00%     12901         -
# 3  Short offline       Completed without error       00%     12637         -
# 4  Short offline       Completed without error       00%     12157         -
# 5  Short offline       Completed without error       00%     11917         -
# 6  Short offline       Completed without error       00%     11437         -
# 7  Short offline       Completed without error       00%     11136         -
# 8  Short offline       Completed without error       00%     10896         -
# 9  Short offline       Completed without error       00%     10416         -
#10  Short offline       Completed without error       00%     10153         -
#11  Short offline       Completed without error       00%      9673         -
#12  Short offline       Completed without error       00%      9481         -
#13  Short offline       Completed without error       00%      9001         -
#14  Short offline       Completed without error       00%      8737         -
#15  Short offline       Completed without error       00%      8257         -
#16  Short offline       Completed without error       00%      7993         -
#17  Short offline       Completed without error       00%      7513         -
#18  Short offline       Completed without error       00%      7273         -
#19  Short offline       Completed without error       00%      6771         -
#20  Short offline       Completed without error       00%      6291         -
#21  Short offline       Completed without error       00%      6027         -

SMART Selective self-test log data structure revision number 1
SPAN  MIN_LBA  MAX_LBA  CURRENT_TEST_STATUS
    1        0        0  Not_testing
    2        0        0  Not_testing
    3        0        0  Not_testing
    4        0        0  Not_testing
    5        0        0  Not_testing
Selective self-test flags (0x0):
  After scanning selected spans, do NOT read-scan remainder of disk.
If Selective self-test is pending on power-up, resume after 0 minute delay.

 

[anodos]

post output of "dmesg" and "camcontrol devlist".

 

[TheWizzard]

just booted with the old 8.3 for checking: there I see three drives, not two. One seems really to be "missing" ...

now back in 9.x.x.x

dmesg:

Code:

Copyright (c) 1992-2013 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 9.2-RELEASE-p12 #0 r262572+b043649: Sun Sep 28 23:03:31 PDT 2014
    root@build3.ixsystems.com:/tank/home/jkh/build/921/freenas/os-base/amd64/fusion/jkh/921/freenas/FreeBSD/src/sys/FREENAS.amd64 amd64
gcc version 4.2.1 20070831 patched [FreeBSD]
CPU: Intel(R) Celeron(R) CPU          420  @ 1.60GHz (1600.03-MHz K8-class CPU)
  Origin = "GenuineIntel"  Id = 0x10661  Family = 0x6  Model = 0x16  Stepping = 1
  Features=0xafebfbff<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,TM,PBE>
  Features2=0xe31d<SSE3,DTES64,MON,DS_CPL,TM2,SSSE3,CX16,xTPR,PDCM>
  AMD Features=0x20100800<SYSCALL,NX,LM>
  AMD Features2=0x1<LAHF>
  TSC: P-state invariant, performance statistics
real memory  = 2147483648 (2048 MB)
avail memory = 2035609600 (1941 MB)
Event timer "LAPIC" quality 400
ACPI APIC Table: <121907 APIC1340>
WARNING: VIMAGE (virtualized network stack) is a highly experimental feature.
ioapic0 <Version 2.0> irqs 0-23 on motherboard
kbd1 at kbdmux0
cryptosoft0: <software crypto> on motherboard
aesni0: No AESNI support.
padlock0: No ACE support.
acpi0: <121907 XSDT1340> on motherboard
acpi0: Power Button (fixed)
acpi0: reservation of 0, a0000 (3) failed
acpi0: reservation of 100000, 7f700000 (3) failed
cpu0: <ACPI CPU> on acpi0
attimer0: <AT timer> port 0x40-0x43 irq 0 on acpi0
Timecounter "i8254" frequency 1193182 Hz quality 0
Event timer "i8254" frequency 1193182 Hz quality 100
atrtc0: <AT realtime clock> port 0x70-0x71 irq 8 on acpi0
Event timer "RTC" frequency 32768 Hz quality 0
Timecounter "ACPI-fast" frequency 3579545 Hz quality 900
acpi_timer0: <24-bit timer at 3.579545MHz> port 0x808-0x80b on acpi0
pcib0: <ACPI Host-PCI bridge> port 0xcf8-0xcff on acpi0
pci0: <ACPI PCI bus> on pcib0
vgapci0: <VGA-compatible display> port 0xec00-0xec07 mem 0xffa80000-0xffafffff,0xe0000000-0xefffffff,0xffa40000-0xffa7ffff irq 16 at device 2.0 on pci0
agp0: <Intel 82945G (945G GMCH) SVGA controller> on vgapci0
agp0: aperture size is 256M, detected 7932k stolen memory
pcib1: <ACPI PCI-PCI bridge> irq 16 at device 28.0 on pci0
pci1: <ACPI PCI bus> on pcib1
em0: <Intel(R) PRO/1000 Network Connection 7.3.8> port 0xbc00-0xbc1f mem 0xff6e0000-0xff6fffff irq 16 at device 0.0 on pci1
em0: Using an MSI interrupt
em0: Ethernet address: 00:15:17:31:a6:7f
pcib2: <ACPI PCI-PCI bridge> irq 18 at device 28.2 on pci0
pci2: <ACPI PCI bus> on pcib2
siis0: <SiI3132 SATA controller> port 0xcc00-0xcc7f mem 0xff8ffc00-0xff8ffc7f,0xff8f8000-0xff8fbfff irq 18 at device 0.0 on pci2
siisch0: <SIIS channel> at channel 0 on siis0
siisch1: <SIIS channel> at channel 1 on siis0
uhci0: <Intel 82801G (ICH7) USB controller USB-A> port 0xe000-0xe01f irq 23 at device 29.0 on pci0
uhci0: LegSup = 0x2f00
usbus0 on uhci0
uhci1: <Intel 82801G (ICH7) USB controller USB-B> port 0xdc00-0xdc1f irq 19 at device 29.1 on pci0
uhci1: LegSup = 0x2f00
usbus1 on uhci1
uhci2: <Intel 82801G (ICH7) USB controller USB-C> port 0xd880-0xd89f irq 18 at device 29.2 on pci0
uhci2: LegSup = 0x2f00
usbus2 on uhci2
uhci3: <Intel 82801G (ICH7) USB controller USB-D> port 0xd800-0xd81f irq 16 at device 29.3 on pci0
uhci3: LegSup = 0x2f00
usbus3 on uhci3
ehci0: <Intel 82801GB/R (ICH7) USB 2.0 controller> mem 0xffa3f800-0xffa3fbff irq 23 at device 29.7 on pci0
usbus4: EHCI version 1.0
usbus4 on ehci0
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
atapci0: <Intel ICH7 UDMA100 controller> port 0x1f0-0x1f7,0x3f6,0x170-0x177,0x376,0xffa0-0xffaf at device 31.1 on pci0
ata0: <ATA channel> at channel 0 on atapci0
ahci0: <Intel ICH7 AHCI SATA controller> port 0xe880-0xe887,0xe800-0xe803,0xe480-0xe487,0xe400-0xe403,0xe080-0xe08f mem 0xffa3fc00-0xffa3ffff irq 19 at device 31.2 on pci0
ahci0: AHCI v1.10 with 4 3Gbps 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
pci0: <serial bus, SMBus> at device 31.3 (no driver attached)
acpi_button0: <Power Button> on acpi0
uart0: <16550 or compatible> port 0x3f8-0x3ff irq 4 flags 0x10 on acpi0
ichwd0 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
atkbdc0: <Keyboard controller (i8042)> at port 0x60,0x64 on isa0
atkbd0: <AT Keyboard> irq 1 on atkbdc0
kbd0 at atkbd0
atkbd0: [GIANT-LOCKED]
wbwd0: HEFRAS and EFER do not align: EFER 0x2e DevID 0xff DevRev 0xff CR26 0xff
coretemp0: <CPU On-Die Thermal Sensors> on cpu0
coretemp0: Tj(target) value 0 does not seem right.
p4tcc0: <CPU Frequency Thermal Control> on cpu0
Timecounters tick every 1.000 msec
ipfw2 (+ipv6) initialized, divert enabled, nat enabled, default to accept, logging disabled
DUMMYNET 0xfffffe00023ea100 with IPv6 initialized (100409)
load_dn_sched dn_sched RR loaded
load_dn_sched dn_sched WF2Q+ loaded
load_dn_sched dn_sched FIFO loaded
load_dn_sched dn_sched PRIO loaded
load_dn_sched dn_sched QFQ loaded
usbus0: 12Mbps Full Speed USB v1.0
usbus1: 12Mbps Full Speed USB v1.0
usbus2: 12Mbps Full Speed USB v1.0
usbus3: 12Mbps Full Speed USB v1.0
usbus4: 480Mbps High Speed USB v2.0
ugen0.1: <Intel> at usbus0
uhub0: <Intel UHCI root HUB, class 9/0, rev 1.00/1.00, addr 1> on usbus0
ugen1.1: <Intel> at usbus1
uhub1: <Intel UHCI root HUB, class 9/0, rev 1.00/1.00, addr 1> on usbus1
ugen2.1: <Intel> at usbus2
uhub2: <Intel UHCI root HUB, class 9/0, rev 1.00/1.00, addr 1> on usbus2
ugen3.1: <Intel> at usbus3
uhub3: <Intel UHCI root HUB, class 9/0, rev 1.00/1.00, addr 1> on usbus3
ugen4.1: <Intel> at usbus4
uhub4: <Intel EHCI root HUB, class 9/0, rev 2.00/1.00, addr 1> on usbus4
uhub0: 2 ports with 2 removable, self powered
uhub1: 2 ports with 2 removable, self powered
uhub2: 2 ports with 2 removable, self powered
uhub3: 2 ports with 2 removable, self powered
(aprobe1:ahcich1:0:0:0): SET_MULTI. ACB: c6 00 00 00 00 40 00 00 00 00 10 00
(aprobe1:ahcich1:0:0:0): CAM status: ATA Status Error
(aprobe1:ahcich1:0:0:0): ATA status: 51 (DRDY SERV ERR), error: 04 (ABRT )
(aprobe1:ahcich1:0:0:0): RES: 51 04 00 00 00 40 00 00 00 10 00
(aprobe1:ahcich1:0:0:0): Retrying command
(aprobe1:ahcich1:0:0:0): SET_MULTI. ACB: c6 00 00 00 00 40 00 00 00 00 10 00
(aprobe1:ahcich1:0:0:0): CAM status: ATA Status Error
(aprobe1:ahcich1:0:0:0): ATA status: 51 (DRDY SERV ERR), error: 04 (ABRT )
(aprobe1:ahcich1:0:0:0): RES: 51 04 00 00 00 40 00 00 00 10 00
(aprobe1:ahcich1:0:0:0): Error 5, Retries exhausted
(aprobe1:ahcich2:0:0:0): SET_MULTI. ACB: c6 00 00 00 00 40 00 00 00 00 10 00
(aprobe1:ahcich2:0:0:0): CAM status: ATA Status Error
(aprobe1:ahcich2:0:0:0): ATA status: 51 (DRDY SERV ERR), error: 04 (ABRT )
(aprobe1:ahcich2:0:0:0): RES: 51 04 00 00 00 40 00 00 00 10 00
(aprobe1:ahcich2:0:0:0): Retrying command
(aprobe1:ahcich2:0:0:0): SET_MULTI. ACB: c6 00 00 00 00 40 00 00 00 00 10 00
(aprobe1:ahcich2:0:0:0): CAM status: ATA Status Error
(aprobe1:ahcich2:0:0:0): ATA status: 51 (DRDY SERV ERR), error: 04 (ABRT )
(aprobe1:ahcich2:0:0:0): RES: 51 04 00 00 00 40 00 00 00 10 00
(aprobe1:ahcich2:0:0:0): Error 5, Retries exhausted
ada0 at ahcich0 bus 0 scbus3 target 0 lun 0
ada0: <ST3000DM001-1CH166 CC24> ATA-8 SATA 3.x device
ada0: Serial Number Z1F1K3JX
ada0: 300.000MB/s transfers (SATA 2.x, UDMA6, PIO 8192bytes)
ada0: Command Queueing enabled
ada0: 2861588MB (5860533168 512 byte sectors: 16H 63S/T 16383C)
ada0: quirks=0x1<4K>
ada0: Previously was known as ad8
ada1 at ahcich3 bus 0 scbus6 target 0 lun 0
ada1: <ST3000DM001-1CH166 CC24> ATA-8 SATA 3.x device
ada1: Serial Number Z1F1JW9V
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: quirks=0x1<4K>
ada1: Previously was known as ad14
Timecounter "TSC" frequency 1600029824 Hz quality 1000
Root mount waiting for: usbus4
Root mount waiting for: usbus4
Root mount waiting for: usbus4
uhub4: 8 ports with 8 removable, self powered
Root mount waiting for: usbus4
Root mount waiting for: usbus4
ugen4.2: <Verbatim> at usbus4
umass0: <Verbatim STORE N GO, class 0/0, rev 2.10/1.00, addr 2> on usbus4
umass0:  SCSI over Bulk-Only; quirks = 0x4100
umass0:8:0:-1: Attached to scbus8
Trying to mount root from ufs:/dev/ufs/FreeNASs1a [ro]...
mountroot: waiting for device /dev/ufs/FreeNASs1a ...
da0 at umass-sim0 bus 0 scbus8 target 0 lun 0
da0: <Verbatim STORE N GO PMAP> Removable Direct Access SCSI-4 device 
da0: Serial Number 070725EB0CD7E064
da0: 40.000MB/s transfers
da0: 14786MB (30283008 512 byte sectors: 255H 63S/T 1885C)
da0: quirks=0x2<NO_6_BYTE>
GEOM_RAID5: Module loaded, version 1.1.20130907.44 (rev 5c6d2a159411)
ZFS NOTICE: Prefetch is disabled by default if less than 4GB of RAM is present;
            to enable, add "vfs.zfs.prefetch_disable=0" to /boot/loader.conf.
ZFS filesystem version: 5
ZFS storage pool version: features support (5000)
GEOM_ELI: Device ada0p1.eli created.
GEOM_ELI: Encryption: AES-XTS 256
GEOM_ELI:     Crypto: software
GEOM_ELI: Device ada1p1.eli created.
GEOM_ELI: Encryption: AES-XTS 256
GEOM_ELI:     Crypto: software

camcontrol:

Code:

<ST3000DM001-1CH166 CC24>          at scbus3 target 0 lun 0 (pass0,ada0)
<ST3000DM001-1CH166 CC24>          at scbus6 target 0 lun 0 (pass1,ada1)
<Verbatim STORE N GO PMAP>         at scbus8 target 0 lun 0 (pass2,da0)

 

[anodos]

A few thoughts on this:
1) If you have spare SATA cables, try swapping out the cables of the drives that don't show up with ones that are known to be good.
2) You can try switching your motherboard from AHCI to IDE.

 

[TheWizzard]

ok, thanks!
Or should I try to use another PC/Server? Can this do harm, if I swap the platform?

 

[anodos]

ok, thanks!
Or should I try to use another PC/Server? Can this do harm, if I swap the platform?

I don't know any reason why it should cause harm. Just make sure it has 8GB RAM and enough SATA ports.

 

[Ericloewe]

amount of RAM: 2GB (unfortunately, the machine doesn't support more)

Well, there's your problem. Hardware requirements are there for a reason. Sudden, inexplicable pool loss is a common symptom of memory starvation on FreeNAS, hence the 8GB requirement.

 

[anodos]

Well, there's your problem. Hardware requirements are there for a reason. Sudden, inexplicable pool loss is a common symptom of memory starvation on FreeNAS, hence the 8GB requirement.

Let me guess, you sometimes blurt out the ending to a movie halfway through. :)