ERROR: No system volume found! System services can't work without system volume !

[Gr-R]

Run a consistency check on the raid array and see if the previous errors can be repaired.

[Franck67]

//dssA0019718> /c7/u0 start verify
Sending start verify message to /c7/u0 ... Done.

//dssA0019718> show alarms

Ctl Date Severity AEN Message
------------------------------------------------------------------------------
c7 [Thu Sep 17 2015 01:47:02] INFO Verify started: unit=0

//dssA0019718> /c7/u0 show all
/c7/u0 status = VERIFYING
/c7/u0 is not rebuilding, its current state is VERIFYING
/c7/u0 is verifying with percent completion = 0%(A)
/c7/u0 is initialized.
/c7/u0 Write Cache = on
/c7/u0 Read Cache = Intelligent
/c7/u0 volume(s) = 1
/c7/u0 name = Vol1
/c7/u0 serial number = 9WM2JY4601B83600A20A
/c7/u0 Ignore ECC policy = on
/c7/u0 Auto Verify Policy = off
/c7/u0 Storsave Policy = balance
/c7/u0 Command Queuing Policy = on
/c7/u0 Rapid RAID Recovery setting = all
/c7/u0 Parity Number = 2

Unit UnitType Status %RCmpl %V/I/M VPort Stripe Size(GB)
------------------------------------------------------------------------
u0 RAID-6 VERIFYING - 0%(A) - 256K 18626.3
u0-0 DISK OK - - p8 - 1862.63
u0-1 DISK OK - - p9 - 1862.63
u0-2 DISK OK - - p10 - 1862.63
u0-3 DISK OK - - p11 - 1862.63
u0-4 DISK OK - - p12 - 1862.63
u0-5 DISK OK - - p13 - 1862.63
u0-6 DISK OK - - p14 - 1862.63
u0-7 DISK OK - - p15 - 1862.63
u0-8 DISK OK - - p16 - 1862.63
u0-9 DISK OK - - p17 - 1862.63
u0-10 DISK OK - - p18 - 1862.63
u0-11 DISK OK - - p19 - 1862.63
u0/v0 Volume - - - - - 18626.3



let's see if it will help, but i have doubts, because after the rebuild, there was an automatic verify, and it found nothing wrong.
Is that the good way to check consistency on 3ware controller btw ?

[Gr-R]

There is a good chance you will need to restore from backups. Wait and see if there are more repairs. The system volume can be rebuilt if needed.

[Franck67]

i have no backups.
If this volume doesnt come back, i dont know what to do...

[Franck67]

and concretely, at the end of this test, what should i do ? just reboot my NAS and it should work ? or some others commands to run ?

[Franck67]

I arrived this morning at work, verify completed, without errors, but no difference, still the same error...

[Pi-L]

System volume is a small partition used for storing configuration of most services. If it is corrupted due to hardware problem you will not be able to access the data, even if it is on completely different device.
Each volume group has its own system volume, so in case one is corrupted you can switch to the other one (if you dont have backup of configuration just create new share/iscsi target with exiting volume to access the data).
What you should do now is to reinstall the os to make sure boot medium is ok, or boot it from flash drive and switch default volume group to other one to use other system volume.
If you need more help open a support ticket so support guys can help you.