Unexpected Shutdown when initializing iSCSI Volume

[nsc]

I check ARECA GUI of my 1680, i don't have a lot of option :

Volume Option:
Volume Stripe Size : 64 KB (or 4, 8 16, 32, 128)
Volume Cache Mode : Write Back (or Write Through)
Tagged Queuing : Enabled

System Option:
SATA NCQ Support : Enabled
HDD Read Ahead Cache : Enabled (or disable Maxtor, Disabled)
Volume Data Read Ahead : Normal (or aggressive, convervative, disable)
HDD Queue Depth : 32 (or 1 2 4 8 16)
Disk Write Cache Mode : Auto (or Enabled Disabled)

And some others options, but i don't think they are "Cache" related.

I have to play with Write Back / Write Through first ?

[To-M]

Use the Write Back feature first.

[nsc]

Write Back is my current config (the one with shutdown...)

May be i could "stress" my second DSS to be sure that is a problem hardware first ?

And to remember, i got a shutdown when applying update 3511, i can suppose that while copying to USB Stick to intern USB the RAID Unit is not used...

[To-M]

When updating with DSS 3511 the system is down so there is no effect on the RAID controller on on the USB DOM.

[nsc]

I got the same shutdown, at 92% of copy, shutdown...

So i could suppose that i have another problem right ?

After this shutdown i made a 4 hours Memtest without any errors...

I could contact my vendor for garanty, but first i need to know which part of the server is deffective...

[To-M]

Did you test with a smaller size, maybe 100GB to see if it crashed again?

[nsc]

After the crash in init volume lv000 : (lv000 1.5 To, lv001 1.4To, lv002 70GB) we restart server and it finish the init without any other trouble.

I removed everything and restart with 10 volumes of 100GB, we'll see.