Downgrading iOmega ix2-200 drives challenges (part 2)
this is a part 2 of my last post “Downgrading iOmega ix2-200 drives challenges” and resumes from that
so after all my iscsi data was copied over to my machine, i decided to plug the drive back in and do an offline scan…
eventually that failed, so there is no repairing the drive.
on bay 1 i inserted a new 1tb SATA drive and left the existing 2tb SATA drive in there. i tried to rebuild the array but of course the smaller drive is smaller and it was not possible.
however i was determined to do this so what i did was SSH into the NAS using WinSCP and copied the ISCSI files to my computer (just in case).
what i did after i had a copied the files was stop the SCSI service.
from then i broke the RAID array – this told me it needs to delete existing data to change drive configuration which is what i expected (on the below picture you can sort of see the different drive sizes behind the message box)
eventually this completes and i have no data on a non RAID drive. then i powered off the NAS and proceeded to remove the existing 2tb drive to replace with a new 1tb drive (so both drives will be new and 1tb in size each). i powered on NAS expecting to possibly see a WLoD (White Light of Death) which is what happens when neither drive has the boot files/partition. to my suprise it came back up.
again i went to drive management and proceeded to change from protection none to protection mirror (RAID 1) – again, i have to confirm all data will be erased.
once that is clicked RAID will build. youll end up with an empty RAID 1 (mirror) NAS. after this was done, i went and created a ‘fake’ ISCI drive, named it the same name as the previous one, fired up WinSCP and went back to /mnt/pools/A/A0/iSCSI found the new ISCSI there. then i re-stopped the ISCSI service, renamed the file (in case what im trying to do doesnt work) and proceeded to upload my old ISCI file back to the same place as the new file
after this is done, i now have a fake ISCSI file and the real ISCSI file i need. went back and turned on iSCSI service on NAS and proceeded to try and configure my ISCI initiator on my Windows computer to point to NAS.
low and behold, the old file is accepted and im prompted with a BitLocker encryption challenge (my ISCSI was BitLocker encrypted). i authenticated and now can see the file system again.
it took about 3 days since copying the ISCSI files up and down takes a really long time but i have the NAS on RAID 1 with 2 new drives and the ISCSI files still intact.
now i have a big ISCSI container which is 500gb in size. since i dont have this much space, the approach to take is create the fake iSCSI target file, stop the ISCI service in nas, delete the file, upload the intended one, turn on ISCI service and continue as if nothing happened.
i hope that helps who ever stumbles into this. important to note that after the RAID is broken it seems to place the boot files in both drives which allowed me to remove the 2nd drive and end up with all new drives, unless the latest FW somehow puts the boot sector/files NAS RAM and not drives. either way its good to know that you can do a two drive swap and still use the NAS.