so, about following your link :

lqqqqqqqqqqqq Volume group selection qqqqqqqqqqqqk
x Select default volume group (system volume x
x will be used on selected volume group): x
x lqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqk x
x x (X) vg00 x x
x mqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqj x
tqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqu
x < OK > <Cancel> x
mqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqj


i get no choice in the menu.
but vg00 seems already chosen, so it changes nothing in the end.

i added a new disk in the NAS :

//dssA0019718> /c7 show

Unit UnitType Status %RCmpl %V/I/M Stripe Size(GB) Cache AVrfy
------------------------------------------------------------------------------
u0 RAID-6 OK - - 256K 18626.3 RiW OFF

VPort Status Unit Size Type Phy Encl-Slot Model
------------------------------------------------------------------------------
p8 OK u0 1.82 TB SATA - /c7/e0/slt0 ST32000644NS
p9 OK u0 1.82 TB SATA - /c7/e0/slt1 ST32000644NS
p10 OK u0 1.82 TB SATA - /c7/e0/slt2 ST2000NM0033-9ZM175
p11 OK u0 1.82 TB SATA - /c7/e0/slt3 ST32000644NS
p12 OK u0 1.82 TB SATA - /c7/e0/slt4 ST32000644NS
p13 OK u0 1.82 TB SATA - /c7/e0/slt5 ST32000644NS
p14 OK u0 1.82 TB SATA - /c7/e0/slt6 ST2000NM0033-9ZM175
p15 OK u0 1.82 TB SATA - /c7/e0/slt7 ST32000644NS
p16 OK u0 1.82 TB SATA - /c7/e0/slt8 ST32000644NS
p17 OK u0 1.82 TB SATA - /c7/e0/slt9 ST32000644NS
p18 OK u0 1.82 TB SATA - /c7/e0/slt10 ST32000644NS
p19 OK u0 1.82 TB SATA - /c7/e0/slt11 ST32000644NS
p20 OK - 1.82 TB SATA - /c7/e0/slt23 ST2000NM0033-9ZM175


in the slot23, so what should i do now ? sorry im a bit confused, and stressed to damage something else, that would lose my datas for good, so i ask many questions.