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Hi @JonathanM, thx for such a brisk answer. I wasn`t sure about the parity drive logic so kudos to your comment. I don`t have other 12TBs on me at the moment so can`t perform the action I pointed out above....now it`s clear to me. I do have backups but it`d take ages to restore them....that`s why I was asking Btw all data drives returned SMART extended status as OK and parity check ended tonight with 0 errors...since then I haven`t started the array in normal mode, only maintance. Therefore, I`ll start the upgrade process as per your comment. In case everything goes fine, I won`t bother you any further 🙂

Hi! I wanted to consult my situation before performing the upgrade. My aim is to upgrade both parity and one data drive - upgrading my 6TBs to 12TBs. I`m scared of data loss or any other crap that might happen during the upgrade and honestly, I`m not confident with just replacing the parity drive, let it sync and then do the same with data drive (because my server uses just 1 parity drive). Therefore, all I wanted to consult is this procedure: - upgrade/update everything in the server so it runs the latest SW - disable all planned activities (mover, parity checks, backups) - disable autostart of the array & docker/VMs - perform flash backup - start array in maintance mode & let it sync the parity - unmount SSD cache disk (assigned in cache pool) and pull out completely - mount the new 12TB drive instead of cache and make it 2nd parity drive - let the new parity drive sync - pull out old data drive & put in new 12TB new one - let the server rebuild the data drive - pull out 1st old parity drive (6TB one) - put in cache drive to the original slot - rewind all the changed settings - live happily ever after Summary: - old state: 1 parity (6TB) + 4 x data (6TB) + 1 SSD cache - new state: 1 parity (12Tb) + 3 x data (6tb) + 1 x data (12TB) + 1 SSD cache) Is this procedure safe & and actually doable? Have I forgotten anything which should be definitely done? PS: My MB offers 6 SATA ports, all of which are used. I wouldn`t be asking if I had large server with all the SATA slots I needed. Thx a lot for the response! (I`m getting gray hair and haven`t even started )

Hi. I was just wondering that making a Czech translation might be a good project. @pavuucek pls let me know if I can assist, make revisions or dig a bit deeper