for those who want to know about :

netapp used to code its Ontapp soft the way it permit any spare from one filer to go to another one, transparently (your hand doing the job though), hot swappable and so on you were able to keep one spare in each filer and one extra disk in a safe place (in case of emergency)

now there is a little trick that worth to be known : if a some of your filer are in >= 65 and other filer are in <= 64 you can get a 64 spare disk and put it in one of your 65 filer but you can't do the reverse also if you have putted a disk in 65 (just as like a spare one) you cant put it back in a 64 filer

ontap code something - i dont know what - that trigger an error message when you put a 65 spare disk in a 64 filer : "X..._ST... this disk is from a newer version, either remove this disk or upgrade the os"

i was told you have 3 possibilities : - ask netapp for a disk as a replacement to this one - put the disk in a 65 ontap which will "write" on the disk a way it could be include in a 64 system - upgrade the dot in 65

i tested the second solution unsuccessfully and in case you don't want to wait for a replacement and do not want to upgrade (for the moment) the only solution i found is to zeroing the disk

zeroing the disk mean erasing all data on all disks in order to reinstall a new filesystem from scratch so, do so only if u know what you are doing

bye