tool to recover SFS formated HD

[lionstorm]

Hi all,
My boot partition is having SFS1.190 as filesystem (noted CF0 in HDtoolBox). Yesterday I wanted to add the newest SFS version 1.205 so I just copy the needed file to L and run HDtoolbox to update the FS. After a reset my amiga says : non DOS disk in HD0 so I lost everything  :-(
So now what do you advise me to do ? I tried the emergency disk from OS39 but it does not work.

Please help (my last backup is from march2003 and in between I played around a lot so the only option would be to recover my partition, but how?)
Lio

[lionstorm]

I can not access the drive and all the needed files are on this partition. At the moment I search on aminet to get all SFS related tools including SFSsalv. I already try to downgrade but HDtoolBox is telling me before I save that all datas will be lost which I can not affor at all costs.
I can boot on another HD and try to repair from there.
Lio

[lionstorm]

Before I was upgrading from SFS1.190 to SFS1.205 and now I downgrade from 1.205 to 1.190 and there I got this warning message.
Lio

[lionstorm]

Essentially you dont advise me to use SFSsalv or others SFS related tools ?
Anyway will try this evening.
Thanks
Lio

[lionstorm]

A little update :
I used RDBrecov to check my HD and start cyl and size are the same as in HDTB. The only difference is the dos type : RDB says it is 53465300 and HDTB says 0x43465300. So I change the dos identifier in HDTB to what RDB said and reboot. And now my HD is rebooting in a loop and sometimes I cant access the early startup menu at all ?? Nothing is working anymore (only constantly rebooting) as long as this HD is connected. So I transfer this HD to my other A1200. Partitions are only viewable under HDTB with SFS/0 as filesystem (before was CF/0) but still no access.
Lio

[lionstorm]

Do you think that the fact I changed only the filesystem on one partition (the boot) would explain why my amiga keeps resetting ?
Lio

[lionstorm]

Problem solved, thanks to all of you !! I learnt a few things from this : always backup regularly, create a small bootable partition with a lower boot priority, update the filesystem on all partitions using the same filesystem in HDTB, use the same version of HDTB to recover.
Lio